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  • 1.
    Anasori, Babak
    et al.
    Drexel University, PA 19104 USA.
    Halim, Joseph
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Drexel University, USA.
    Lu, Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Voigt, Cooper A.
    Drexel University, PA 19104 USA.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Barsoum, Michel W.
    Drexel University, PA 19104 USA.
    Mo2TiAlC2: A new ordered layered ternary carbide2015Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 101, s. 5-7Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Herein we report on the synthesis of a new layered ternary carbide, Mo2TiAlC2, that was synthesized by heating an elemental mixture at 1600 degrees C for 4 h under an Ar flow. Its hexagonal, a and c lattice parameters were calculated via Rietveld analysis of powder X-ray diffraction patterns to be, respectively, 2.997 angstrom and 18.661 angstrom. High-resolution scanning transmission electron microscopy showed that this phase is ordered, with Ti layers sandwiched between two Mo layers in a M(3)AX(2) type ternary carbide structure. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

  • 2.
    Asp Grönhagen, Klara
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Agren, J.
    Royal Institute Technology, Sweden.
    Odén, Magnus
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Phase-field modelling of spinodal decomposition in TiAlN including the effect of metal vacancies2015Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 95, s. 42-45Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Using a CALPHAD approach together with a Cahn-Hilliard model, we describe the microstructure evolution in cubic Ti1-xAlxN including vacancies on the metal sublattice. Our results show that vacancy content has a pronounced effect on the decomposition kinetics. Furthermore, vacancies show a strong tendency to segregate to the coherent AlN-TiN interface regions. We illustrate how vacancies anneal to grain boundaries, and finally, we compare our prediction to experimental differential scanning calorimetry data and attribute the second peak in the thermogram to vacancy depletion.

  • 3.
    Barrirero, Jenifer
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi. Linköpings universitet, Tekniska fakulteten. University of Saarland, Germany.
    Li, Jiehua
    University of Leoben, Austria.
    Engstler, Michael
    University of Saarland, Germany.
    Ghafoor, Naureen
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska fakulteten.
    Schumacher, Peter
    University of Leoben, Austria.
    Odén, Magnus
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska fakulteten.
    Muecklich, Frank
    University of Saarland, Germany.
    Cluster formation at the Si/liquid interface in Sr and Na modified Al-Si alloys2016Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 117, s. 16-19Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Atom probe tomography was used to compare Na and Sr modified Al-Si hypoeutectic alloys. Both Na and Sr promote the formation of nanometre-sized clusters in the Si eutectic phase. Compositional analyses of the clusters show an Al:Sr ratio of 2.92 +/- 0.46 and an Al:Na ratio of 1.07 +/- 0.23. It is proposed that SrAl2Si2 and NaAlSi clusters are formed at the Si/liquid interface and take part in the modification process by altering the eutectic Si growth.

  • 4.
    Bartosik, M.
    et al.
    TU Wien, Austria.
    Keckes, J.
    University of Leoben, Austria.
    Persson, Per O A
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Riedl, H.
    TU Wien, Austria.
    Mayrhofer, P. H.
    TU Wien, Austria.
    Interface controlled microstructure evolution in nanolayered thin films2016Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 123, s. 13-16Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    X-ray nano-diffraction and transmission electron microscopy were conducted along the thickness of a similar to 4 pm thick CrN/AlN multilayer with continuously increasing AlN layer thicknesses from similar to 1 to 15 nm on similar to 7 nm thick CrN template layers. The experiments reveal coherent growth, large columnar grains extending over several (bi-)layers for thin AlN layer thicknesses below similar to 4 nm. Above similar to 4 nm, the nucleation of the thermodynamically stable wurtzite structured AlN is favored, leading to coherency breakdown and reduction of the overall strains, disrupting the columnar microstructure and limiting the maximum grain size in film growth direction to the layer thickness. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd.

  • 5.
    Broitman, Esteban
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Tengdelius, Lina
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Hangen, Ude D.
    Hysitron Inc., Minneapolis, Minnesota, USA.
    Lu, Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Högberg, Hans
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    High-temperature nanoindentation of epitaxial ZrB2 thin films2016Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 124, s. 117-120Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We use in-situ heated nanoindentation to investigate the high-temperature nanomechanical properties of epitaxial and textured ZrB2 films deposited by magnetron sputtering. Epitaxial films deposited on 4H-SiC(0001) show a hardness decrease from 47 GPa at room temperature to 33 GPa at 600 °C, while the reduced elastic modulus does not change significantly. High resolution electron microscopy (HRTEM) with selected area electron diffraction of the indented area in a 0001-textured film reveals a retained continuous ZrB2 film and no sign of crystalline phase transformation, despite massive deformation of the Si substrate. HRTEM analysis supports the high elastic recovery of 96% in the films.

  • 6.
    Chai, Guocai
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Zhou, Nian
    Sandvik Materials Technology, Sandviken.
    Ciurea, Sorina
    Sandvik Materials Technology, Sandviken.
    Andersson, Marcus
    Sandvik Materials Technology, Sandviken.
    Peng, Ru
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Local Plasticity Exhaustion in a Very High Cycle Fatigue Regime2012Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 66, nr 10, s. 769-772Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Very high cycle fatigue behaviors of four metal materials with different microstructures have been studied focusing on their damage mechanisms. It was found that the cyclic plastic deformation in the materials was highly localized in the very high cycle regime or the elastic deformation regime. This high strain localization can cause local plasticity exhaustion, which leads to a stress concentration and consequently fatigue crack initation, and finally the formation of a subsurface non-defect fatigue crack origin.

  • 7.
    Fashandi, Hossein
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Andersson, Mike
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Eriksson, Jens
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Lu, Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Smedfors, K.
    School of Information and Communication Technology, KTH, Stockholm, Sweden.
    Zetterling, C. -M
    School of Information and Communication Technology, KTH, Stockholm, Sweden.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Eklund, Per
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Single-step synthesis process of Ti3SiC2 ohmic contacts on 4H-SiC by sputter-deposition of Ti2015Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 99, s. 53-56Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report a single-step procedure for growth of ohmic Ti3SiC2 on 4H-SiC by sputter-deposition of Ti at 960 °C, based on the Ti–SiC solid-state reaction during deposition. X-ray diffraction and electron microscopy show the growth of interfacial Ti3SiC2. The as-deposited contacts are ohmic, in contrast to multistep processes with deposition followed by rapid thermal annealing. This procedure also offers the possibility of direct synthesis of oxygen-barrier capping layers before exposure to air, potentially improving contact stability in high-temperature and high-power devices.

  • 8.
    Greczynski, Grzegorz
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Lu, Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Tengstrand, Olof
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Petrov, Ivan
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten. Materials Science and Physics Departments, Frederick Seitz Materials Research Laboratory, University of of Illinois, Urbana, IL, United States.
    Greene, Joseph E.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten. Materials Science and Physics Departments, Frederick Seitz Materials Research Laboratory, University of of Illinois, Urbana, IL, United States.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Nitrogen-doped bcc-Cr films: Combining ceramic hardness with metallic toughness and conductivity2016Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 122, s. 40-44Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report the first results on nanostructured N-doped bcc-Cr films exhibiting the unique combination of ceramic hardness with metallic toughness and electrical conductivity at unexpectedly low N concentrations, ~ 5 at.%. The Cr:N films are deposited at 200 C in N2/Ar mixtures by high-power pulsed magnetron sputtering using tunable time-domain control of Cr+ and Cr2+ ion fluxes incident at the film growth surface. Subplanted N atoms impede annealing of metal-ion induced point defects and hinder bcc-Cr grain growth, resulting in a material with a nearly isotropic nanostructure and atomically smooth surface, rather than typical Cr:N solid solutions consisting of faceted microcolumns. © 2016 Elsevier Ltd.

  • 9.
    Hedstrom, Peter
    et al.
    Luleå University of Technology.
    Lienert, Ulrich
    Luleå University of Technology.
    Almer, Jon
    Luleå University of Technology.
    Oden, Magnus
    Luleå University of Technology.
    Stepwise transformation behavior of the strain-induced martensitic transformation in a metastable stainless steel2007Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 56, nr 3, s. 213-216Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In situ high-energy X-ray diffraction during tensile loading has been used to investigate the evolution of lattice strains and the accompanying strain-induced martensitic transformation in cold-rolled sheets of a metastable stainless steel. At high applied strains the transformation to alpha-martensite occurs in stepwise bursts. These stepwise transformation events are correlated with stepwise increased lattice strains and peak broadening in the austenite phase. The stepwise transformation arises from growth of alpha-martensite embryos by autocatalytic transformation.

  • 10.
    Larsson, Cecilia
    et al.
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Clausen, B.
    Los Alamos National Laboratory, Los Alamos, USA.
    Holden, T.M.
    Los Alamos National Laboratory, Los Alamos, USA.
    Bourke, M.A.M.
    Los Alamos National Laboratory, Los Alamos, USA.
    Measurements and predictions of strain pole figures for uniaxially compressed stainless steel2004Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 51, nr 6, s. 571-575Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Strain pole figures representative of residual intergranular strains were determined from an −2.98% uniaxially compressed austenitic stainless steel sample. The measurements were made using neutron diffraction on the recently commissioned Spectrometer for Materials Research at Temperature and Stress (SMARTS) at Los Alamos National Laboratory, USA. The measurements were compared with predictions from an elasto-plastic self-consistent model and found to be in good agreement.

  • 11.
    Meshkian, Rahele
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Näslund, Lars-Åke
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Halim, Joseph
    Department of Materials Science & Engineering, Drexel University, Philadelphia, USA.
    Lu, Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Barsoum, Michel W.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Rosén, Johanna
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Synthesis of two-dimensional molybdenum carbide, Mo2C, from the gallium based atomic laminate Mo2Ga2C2015Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 108, s. 147-150Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report on the synthesis of a two-dimensional transition metal carbide, Mo2C, (MXene) obtained by immersing Mo2Ga2C thin films in hydrofluoric acid. Experimental evidences for neither synthesis of a Mo-based MXene nor selective etching of Ga from an atomic nanolaminate have previously been presented. MXene formation is verified through X-ray diffraction, transmission electron microscopy, and energy dispersive X-ray spectroscopy. This discovery unlocks new potential applications for Mo-based MXenes in a host of applications, from thermoelectrics to catalysis and energy storage.

  • 12.
    Mockuté, Aurelija
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Palisaitis, Justinas
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Alling, Björn
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten. Max Planck Institute Eisenforsch GmbH, Germany.
    Berastegui, P.
    Uppsala University, Sweden.
    Broitman, Esteban
    Linköpings universitet, Institutionen för fysik, kemi och biologi. Linköpings universitet, Tekniska fakulteten.
    Näslund, Lars-Åke
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik.
    Nedfors, Nils
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Lu, Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Jensen, Jens
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Patscheider, J.
    EMPA, Switzerland.
    Jansson, U.
    Uppsala University, Sweden.
    Persson, Per O A
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Rosén, Johanna
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
    Age hardening in (Ti1-xAlx)B2+Delta thin films2017Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 127, s. 122-126Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Thin films of (Ti0.71Al0.29)B2+1.08 have been deposited by magnetron sputtering. Post-deposition annealing at 1000 degrees C for 1 h results in increased hardness and elastic modulus, from 32 to 37 GPa and from 436 to 461 GPa, respectively. In both as-deposited and annealed states the films adhere well to the substrate, indicating no considerable internal stress. The initial high hardness is attributed to a columnar microstructure consisting of crystalline (Ti,Al)B-2 columns separated by an amorphous B matrix. The observed age hardening corresponds to phase separation within the (Ti,Al)B-2 columns including the formation of Ti-deficient crystallites within the grain interior upon annealing. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

  • 13.
    Molina-Aldareguia, J.M.
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Emmerlich, Jens
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Palmquist, J.-P.
    Ångström Laboratory, Department of Materials Chemistry, Uppsala University, Uppsala, Sweden.
    Jansson, U.
    Ångström Laboratory, Department of Materials Chemistry, Uppsala University, Uppsala, Sweden.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Kink formation around indents in laminated Ti3SiC2 thin films studied in the nanoscale2003Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 49, nr 2, s. 155-160Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The deformation mechanisms in ductile Ti3SiC2(0 0 0 1) single-crystal films have been analysed by nanoindentation and cross-sectional transmission electron microscopy. Permanent deformation includes formation of kink bands, as the nanolaminated material buckles out at the perimeter of the contact area, and delamination cracks. Evidence is presented for incipient kink-band formation.

  • 14.
    Panagopoulos, C.N.
    et al.
    Laboratory of Physical Metallurgy, Natl. Tech. Univ. Athens, 157 80 Z., Athens, Greece.
    Papachristos, V.D.
    Laboratory of Physical Metallurgy, Natl. Tech. Univ. Athens, 157 80 Z., Athens, Greece.
    Wahlstrom, U.
    Industrial Microelectronics Center, Linkoping 581 83, Sweden.
    Leisner, P.
    Industrial Microelectronics Center, Linkoping 581 83, Sweden.
    Christoffersen, L.W.
    Dept. of Manufacturing Engineering, Tech. University of Denmark, 2800, Lyngby, Denmark.
    Ni-P-W multilayered alloy coatings produced by pulse plating2000Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 43, nr 7, s. 677-683Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The possibility of producing multilayered alloy coatings consisting of alternate amorphous layers, by the electrodeposition method, using pulsed current was investigated. The alternate metallic amorphous layers were selected to consist of Ni-P-W ternary alloys, in order to study the effect of the incorporation of a third element in the structure of an electrodeposited Ni-P multilayered alloy coating. The well-defined layered structure found in the Ni-P-W multilayered alloy coatings, consisting of X-ray amorphous layers, shows that production of a ternary Ni-P-W multilayered alloy coating with the selected method is feasible and this may expand the potential applications of a Ni-P based multilayered alloy coating.

  • 15.
    Pozina, Galia
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Trinh, David H.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Högberg, Hans
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Collin, M.
    Sandvik Toolin AB.
    Reineck, I.
    Sandvik Tooling AB.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Phase identification in γ- and κ-alumina coatings by cathodoluminescence2009Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 61, nr 4, s. 379-382Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Cathodoluminescence (CL) properties were studied for metastable γ- and κ-Al2O3 coatings for cutting tool inserts. The alumina films demonstrate a strong CL, with peak energies depending on the Al2O3 polymorphs. The phase transformation caused by heat treatment is shown to correlate with strong CL modification in the annealed coatings. Spatially resolved CL is found to be a powerful nondestructive technique for identification of different alumina phases on the microscopic level. The corresponding optical properties of γ- and κ-Al2O3 are discussed.

  • 16.
    Rogström, Lina
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Johnson, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Johansson, Mats P.
    SECO Tools AB, Fagersta, Sweden.
    Ahlgren, Mats
    Sandvik Tooling AB.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Odén, Magnus
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Age hardening in arc-evaporated ZrAlN thin films2010Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 62, nr 10, s. 739-741Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Zr0.44Al0.56N1.20 films were deposited by reactive arc evaporation on WC-Co substrates. As-deposited films have a defect-rich NaCl-cubic and wurtzite phase mixture. During annealing at 1100 degrees C the films undergo simultaneous recovery of the ZrN-rich c-ZrAlN nanoscale domains and formation of semicoherent w-ZrAlN nanobricks, while the excess nitrogen is released. This process results in an age hardening effect as high as 36%, as determined by nanoindentation. At 1200 degrees C, the w-AlN recrystallizes and the hardening effect is lost.

  • 17.
    Scabarozi, T H
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Hettinger, J D
    Rowan University.
    Lofland, S E
    Rowan University.
    Lu, Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Jensen, Jens
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Eklund, Per
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Epitaxial growth and electrical-transport properties of Ti(7)Si(2)C(5) thin films synthesized by reactive sputter-deposition2011Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 65, nr 9, s. 811-814Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Epitaxial predominantly phase-pure Ti(7)Si(2)C(5) thin films were grown onto Al(2)O(3)(0 0 0 1) by reactive magnetron sputtering. The c-axis lattice constant is similar to 60.2 angstrom; the Ti(7)Si(2)C(5) unit cell comprises alternating Ti(3)SiC(2)-like and Ti(4)SiC(3)-like half-unit-cell stacking repeated three times. Elastic recoil detection analysis showed a few percent of nitrogen in the films from the acetylene gas used. The nitrogen-induced stabilization mechanism for Ti(7)Si(2)C(5) relative to Ti(3)SiC(2) and Ti(4)SiC(3) is discussed. Electrical-transport measurements showed metallic temperature dependence and a room-temperature resistivity of similar to 45 mu Omega cm.

  • 18.
    Sun, Jun
    et al.
    Tech Univ Denmark, Denmark; Xnovo Technol, Denmark.
    Yu, Tianbo
    Tech Univ Denmark, Denmark.
    Xu, Chaoling
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska fakulteten.
    Ludwig, Wolfgang
    ESRF, France; Univ Lyon, France.
    Zhang, Yubin
    Tech Univ Denmark, Denmark.
    3D characterization of partially recrystallized Al using high resolution diffraction contrast tomography2018Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 157, s. 72-75Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Synchrotron diffraction contrast tomography (DCT) is for the first time used to characterize recrystallized grains in partially recrystallized Al. The positions, orientations and 3D shapes of amp;gt;900 recrystallized grains are reconstructed within a gauge volume. The results are compared with those obtained using electron backscattered diffraction based on a statistical analysis. It is found that recrystallized grains with size larger than 10 mu m, corresponding to similar to 98% of the total recrystallized volume of the sample, are well characterized by DCT. The advantages of DCT for recrystallization studies and new possibilities with DCT on new generation synchrotron sources are discussed. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

  • 19.
    Ul Hassan Alvi, Naveed
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Usman Ali, Syed
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Hussain, S
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Nour, Omer
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Willander, Magnus
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Fabrication and comparative optical characterization of n-ZnO nanostructures (nanowalls, nanorods, nanoflowers and nanotubes)/p-GaN white-light-emitting diodes2011Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 64, nr 8, s. 697-700Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    White light-emitting diodes (LED) based on ZnO (nanowalls, nanorods, nanoflowers and nanotubes)/p-GaN were fabricated and their electrical, optical and electro-optical characteristics were comparatively characterized. All the LED showed rectifying behavior. The nanowalls and nanorods structures have the highest photoluminescence emission intensity in the visible and UV (at 3.29 eV) regions, respectively. The nanowalls have the highest color rendering index, with a value of 95, and the highest electroluminescence intensity with peaks approximately centered at 420, 450 nm and broad peak covering the visible region.

  • 20.
    Wang, Y D
    et al.
    Studsvik Neutron Research Lab Uppsala University.
    Peng, Ru
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för konstruktions- och produktionsteknik, Konstruktionsmaterial.
    McGreevy, R
    Studsvik Neutron Research Lab Uppsala University.
    High Anisotropy of Orentation Dependent Residual Stress in Austenite of Cold Rolled Stainless Steel1999Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, ISSN 1359-6462, Vol. 41, nr No 9, s. 995-1000Artikkel i tidsskrift (Fagfellevurdert)
  • 21.
    Willmann, Herbert
    et al.
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik.
    Beckers, Manfred
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi.
    Giuliani, Finn
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi.
    Birch, Jens
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik.
    Mayrhofer, P.H.
    Department of Physical Metallurgy and Materials Testing, University of Leoben, 8700 Leoben, Austria.
    Mitterer, C.
    Department of Physical Metallurgy and Materials Testing, University of Leoben, 8700 Leoben, Austria.
    Hultman, Lars
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik.
    Single-crystal growth of NaCl-structure Al-Cr-N thin films on MgO(0 0 1) by magnetron sputter epitaxy2007Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 57, nr 12, s. 1089-1092Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Single-crystal NaCl-structure Al0.68Cr0.32N thin films were deposited onto MgO(0 0 1) substrates. The films exhibit cube-on-cube epitaxial growth with an initial pseudomorphic strained layer before complete relaxation into an isotropic lattice parameter of 4.119 Å as shown by symmetric high-resolution X-ray diffraction and asymmetric reciprocal space maps. The relaxation proceeds via a threading dislocation network as revealed by transmission electron microscopy. Films of 900 nm thickness have a hardness of 32.4 ± 0.5 GPa, an elastic modulus of 460.8 ± 5 GPa, and a room-temperature resistivity of 2.7 × 103 O cm as determined by nanoindentation and four-point probe measurements, respectively. © 2007 Acta Materialia Inc.

  • 22.
    Willmann, Herbert
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Mayrhofer, P. H.
    University of Leoben, Austria.
    Persson, Per
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Reiter, A. E.
    Balzers Ltd, Liechtenstein.
    Hultman, Lars
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
    Mitterer, C.
    University of Leoben, Austria.
    Thermal stability of Al-Cr-N hard coatings2006Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 54, nr 11, s. 1847-1851Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Heat treatment of arc-evaporated cubic Al0.7Cr0.3N hard coatings in Ar up to 1450 °C causes precipitation of AlN. The Cr-enriched matrix transforms into Cr via Cr2N under N2 release. These reactions are investigated by simultaneous thermal analysis, mass spectrometry, X-ray diffraction, and analytical transmission electron microscopy.

1 - 22 of 22
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