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Rogström, Lina
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Chen, Y.-H., Roa, J. J., Chen, Y.-H., Johansson-Jõesaar, M. P., Andersson, J. M., Anglada, M. J., . . . Rogström, L. (2018). Enhanced thermal stability and fracture toughness of TiAlN coatings by Cr, Nb and V-alloying. Surface & Coatings Technology, 342, 85-93
Öppna denna publikation i ny flik eller fönster >>Enhanced thermal stability and fracture toughness of TiAlN coatings by Cr, Nb and V-alloying
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2018 (Engelska)Ingår i: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 342, s. 85-93Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The effect of metal alloying on mechanical properties including hardness and fracture toughness were investigated in three alloys, Ti 0.33Al0.50(Me) 0.17N (Me = Cr, Nb and V), and compared to Ti0.50Al0.50N, in the as-deposited state and after annealing. All studied alloys display similar as-deposited hardness while the hardness evolution during annealing is found to be connected to phase transformations, related to the alloy’s thermal stability. The most pronounced hardening was observed in Ti0.50Al0.50N, while all the coatings with additional metal elements sustain their hardness better and they are harder than Ti0.50Al0.50N after annealing at 1100 °C. Fracture toughness properties were extracted from scratch tests. In all tested conditions, as-deposited and annealed at 900 and 1100 °C, Ti0.33Al0.50Nb0.17N show the least surface and sub-surface damage when scratched despite the differences in decomposition behavior and h-AlN formation. Theoretically estimated ductility of phases existing in the coatings correlates well with their crack resistance. In summary, Ti0.33Al0.50Nb0.17N is the toughest alloy in both as-deposited and post-annealed states.

Ort, förlag, år, upplaga, sidor
Elsevier, 2018
Nyckelord
Thermal stability, Quaternary transition metal nitrides, Scratch test, Fracture toughness, Arc evaporation
Nationell ämneskategori
Fysik
Identifikatorer
urn:nbn:se:liu:diva-147842 (URN)10.1016/j.surfcoat.2018.02.059 (DOI)000440120700010 ()2-s2.0-85042726396 (Scopus ID)
Tillgänglig från: 2018-05-15 Skapad: 2018-05-15 Senast uppdaterad: 2018-08-16Bibliografiskt granskad
Schroeder, J., Thomson, W., Howard, B., Schell, N., Näslund, L.-Å., Rogström, L., . . . Birch, J. (2015). Industry-relevant magnetron sputtering and cathodic arc ultra-high vacuum deposition system for in situ x-ray diffraction studies of thin film growth using high energy synchrotron radiation. Review of Scientific Instruments, 86(9), 095113
Öppna denna publikation i ny flik eller fönster >>Industry-relevant magnetron sputtering and cathodic arc ultra-high vacuum deposition system for in situ x-ray diffraction studies of thin film growth using high energy synchrotron radiation
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2015 (Engelska)Ingår i: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 86, nr 9, s. 095113-Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We present an industry-relevant, large-scale, ultra-high vacuum (UHV) magnetron sputtering and cathodic arc deposition system purposefully designed for time-resolved in situ thin film deposition/annealing studies using high-energy (greater than50 keV), high photon flux (greater than10(12) ph/s) synchrotron radiation. The high photon flux, combined with a fast-acquisition-time (less than1 s) two-dimensional (2D) detector, permits time-resolved in situ structural analysis of thin film formation processes. The high-energy synchrotron-radiation based x-rays result in small scattering angles (less than11 degrees), allowing large areas of reciprocal space to be imaged with a 2D detector. The system has been designed for use on the 1-tonne, ultra-high load, high-resolution hexapod at the P07 High Energy Materials Science beamline at PETRA III at the Deutsches Elektronen-Synchrotron in Hamburg, Germany. The deposition system includes standard features of a typical UHV deposition system plus a range of special features suited for synchrotron radiation studies and industry-relevant processes. We openly encourage the materials research community to contact us for collaborative opportunities using this unique and versatile scientific instrument. (C) 2015 AIP Publishing LLC.

Ort, förlag, år, upplaga, sidor
AMER INST PHYSICS, 2015
Nationell ämneskategori
Fysik
Identifikatorer
urn:nbn:se:liu:diva-122441 (URN)10.1063/1.4930243 (DOI)000362573300065 ()26429486 (PubMedID)
Anmärkning

Funding Agencies|Swedish Research Council via the Rontgen Angstrom Cluster (RAC) Frame Program [2011-6505]; German Federal Ministry of Education and Research (BMBF) [05K12CG1]

Tillgänglig från: 2015-11-03 Skapad: 2015-11-02 Senast uppdaterad: 2019-10-07
Shulumba, N., Hellman, O., Rogström, L., Raza, Z., Tasnádi, F., Abrikosov, I. & Odén, M. (2015). Temperature-dependent elastic properties of Ti1−xAlxN alloys. Applied Physics Letters, 107(23)
Öppna denna publikation i ny flik eller fönster >>Temperature-dependent elastic properties of Ti1−xAlxN alloys
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2015 (Engelska)Ingår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 107, nr 23Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Ti1−xAlxN is a technologically important alloy that undergoes a process of high temperature age-hardening that is strongly influenced by its elastic properties. We have performed first principles calculations of the elastic constants and anisotropy using the newly developed symmetry imposed force constant temperature dependent effective potential method, that include lattice vibrations and therefore the effects of temperature, including thermal expansion and intrinsic anharmonicity. These are compared with in situ high temperature x-ray diffraction measurements of the lattice parameter. We show that anharmonic effects are crucial to the recovery of finite temperature elasticity. The effects of thermal expansion and intrinsic anharmonicity on the elastic constants are of the same order, and cannot be considered separately. Furthermore, the effect of thermal expansion on elastic constants is such that the volume change induced by zero point motion has a significant effect. For TiAlN, the elastic constants soften non-uniformly with temperature: C11 decreases substantially when the temperature increases for all compositions, resulting in an increased anisotropy. These findings suggest that an increased Al content and annealing at higher temperatures will result in a harder alloy.

Nationell ämneskategori
Den kondenserade materiens fysik Fysik
Identifikatorer
urn:nbn:se:liu:diva-122957 (URN)10.1063/1.4936896 (DOI)000367010800017 ()
Anmärkning

Funding agencies: Swedish Research Council (VR) [621-2011-4426, 621-2012-4401, 637-2013-7296]; Swedish Foundation for Strategic Research (SSF) [RMA08-0069, SRL10-0026]; VINNOVA [2013-02355(MC2)]; Erasmus Mundus Joint European Doctoral Program DocMASE; Ministry of Education

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Tillgänglig från: 2015-11-30 Skapad: 2015-11-30 Senast uppdaterad: 2017-12-01Bibliografiskt granskad
Rogström, L., Ghafoor, N., Schroeder, J., Schell, N., Birch, J., Ahlgren, M. & Odén, M. (2015). Thermal stability of wurtzite Zr1-xAlxN coatings studied by in situ high-energy x-ray diffraction during annealing. Journal of Applied Physics, 118(3), Article ID 035309.
Öppna denna publikation i ny flik eller fönster >>Thermal stability of wurtzite Zr1-xAlxN coatings studied by in situ high-energy x-ray diffraction during annealing
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2015 (Engelska)Ingår i: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 118, nr 3, artikel-id 035309Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We study the thermal stability of wurtzite (w) structure ZrAlN coatings by a combination of in situ high-energy x-ray scattering techniques during annealing and electron microscopy. Wurtzite structure Zr1-xAlxN coatings with Al-contents from x = 0.46 to x = 0.71 were grown by cathodic arc evaporation. The stability of the w-ZrAlN phase depends on chemical composition where the higher Al-content coatings are more stable. The wurtzite ZrAlN phase was found to phase separate through spinodal decomposition, resulting in nanoscale compositional modulations, i.e., alternating Al-rich ZrAlN layers and Zr-rich ZrAlN layers, forming within the hexagonal lattice. The period of the compositional modulations varies between 1.7 and 2.5 nm and depends on the chemical composition of the coating where smaller periods form in the more unstable, high Zr-content coatings. In addition, Zr leaves the w-ZrAlN lattice to form cubic ZrN precipitates in the column boundaries. (C) 2015 AIP Publishing LLC.

Ort, förlag, år, upplaga, sidor
American Institute of Physics (AIP), 2015
Nationell ämneskategori
Fysik
Identifikatorer
urn:nbn:se:liu:diva-120742 (URN)10.1063/1.4927156 (DOI)000358429200055 ()
Anmärkning

Funding Agencies|VINN Excellence Center on Functional Nanoscale Materials (FunMat); Rontgen-Angstrom Cluster [VR 2011-6505]

Tillgänglig från: 2015-08-24 Skapad: 2015-08-24 Senast uppdaterad: 2017-12-04
Kumar Yalamanchili, P., Schramm, I. C., Jimenez-Pique, E., Rogström, L., Muecklich, F., Odén, M. & Ghafoor, N. (2015). Tuning hardness and fracture resistance of ZrN/Zr0.63Al0.37N nanoscale multilayers by stress-induced transformation toughening. Acta Materialia, 89, 22-31
Öppna denna publikation i ny flik eller fönster >>Tuning hardness and fracture resistance of ZrN/Zr0.63Al0.37N nanoscale multilayers by stress-induced transformation toughening
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2015 (Engelska)Ingår i: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 89, s. 22-31Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Structure and mechanical properties of nanoscale multilayers of ZrN/Zr0.63Al0.37N grown by reactive magnetron sputtering on MgO (0 0 1) substrates at a temperature of 700 degrees C are investigated as a function of the Zr0.63Al0.37N layer thickness. The Zr0.63Al0.37N undergoes in situ chemical segregation into ZrN-rich and AlN-rich domains. The AlN-rich domains undergo transition from cubic to wurtzite crystal structure as a function of Zr0.63Al0.37N layer thickness. Such structural transformation allows systematic variation of hardness as well as fracture resistance of the films. A maximum fracture resistance is achieved for 2 nm thick Zr0.63Al0.37N layers where the AlN-rich domains are epitaxially stabilized in the metastable cubic phase. The metastable cubic-AlN phase undergoes stress-induced transformation to wurtzite-AlN when subjected to indentation, which results in the enhanced fracture resistance. A maximum hardness of 34 GPa is obtained for 10 nm thick Zr0.63Al0.37N layers where the wurtzite-AlN and cubic-ZrN rich domains form semi-coherent interfaces.

Ort, förlag, år, upplaga, sidor
Elsevier, 2015
Nyckelord
Nitride multilayer thin films; Mechanical properties; Fracture toughness
Nationell ämneskategori
Fysik
Identifikatorer
urn:nbn:se:liu:diva-118029 (URN)10.1016/j.actamat.2015.01.066 (DOI)000353249100003 ()
Anmärkning

Funding Agencies|European Unions Erasmus-Mundus graduate school in Material Science and Engineering (DocMASE); Swedish Foundation for Strategic Research (SSF) through the grant Designed Multicomponent Coatings (MultiFilms); Swedish Governmental Agency for Innovation Systems (Vinnova) through the VINN Excellence Centre FunMat; VINNMER Grant [2011-03464]; EU [C/4-EFRE-13/2009/Br]; DFG; federal state government of Saarland [INST 256/298-1 FUGG]

Tillgänglig från: 2015-05-21 Skapad: 2015-05-20 Senast uppdaterad: 2017-12-04Bibliografiskt granskad
Rogström, L., Johansson-Jöesaar, M. P., Landälv, L., Ahlgren, M. & Odén, M. (2015). Wear behavior of ZrAlN coated cutting tools during turning. Surface & Coatings Technology, 282, 180-187
Öppna denna publikation i ny flik eller fönster >>Wear behavior of ZrAlN coated cutting tools during turning
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2015 (Engelska)Ingår i: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 282, s. 180-187Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In this study we explore the cutting performance of ZrAlN coatings. WC:Co cutting inserts coated by cathodic arc evaporated Zr1-xAlxN coatings with x between 0 and 0.83 were testeciin a longitudinal turning operation. The progress of wear was studied by optical microscopy and the used inserts were studied by electron microscopy. The cutting performance was correlated to the coating composition and the best performance was found for the coating with highest Al-content consisting of a wurtzite ZrAlN phase which is assigned to its high thermal stability. Material from the work piece was observed to adhere to the inserts during turning and the amount of adhered material and its chemical composition is independent on the Al-content of the coating. (C) 2015 Elsevier B.V. All rights reserved.

Ort, förlag, år, upplaga, sidor
ELSEVIER SCIENCE SA, 2015
Nyckelord
Zr-Al-N; Cathodic arc evaporation; Wear; Electron microscopy; Metal cutting
Nationell ämneskategori
Fysik
Identifikatorer
urn:nbn:se:liu:diva-123519 (URN)10.1016/j.surfcoat.2015.10.029 (DOI)000365370200023 ()
Anmärkning

Funding Agencies|Vinnova (Swedish Governmental Agency for Innovation Systems) through the VINN Excellence Center on Functional Nanoscale Materials (Fun Mat)

Tillgänglig från: 2015-12-22 Skapad: 2015-12-21 Senast uppdaterad: 2018-01-03Bibliografiskt granskad
Lind, H., Pilemalm, R., Rogström, L., Tasnadi, F., Ghafoor, N., Forsén, R., . . . Abrikosov, I. (2014). High temperature phase decomposition in TixZryAlzN. AIP Advances, 4(12), 127147-1-127147-9
Öppna denna publikation i ny flik eller fönster >>High temperature phase decomposition in TixZryAlzN
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2014 (Engelska)Ingår i: AIP Advances, ISSN 2158-3226, E-ISSN 2158-3226, Vol. 4, nr 12, s. 127147-1-127147-9Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Through a combination of theoretical and experimental observations we study the high temperature decomposition behavior of c-(TixZryAlzN) alloys. We show that for most concentrations the high formation energy of (ZrAl)N causes a strong tendency for spinodal decomposition between ZrN and AlN while other decompositions tendencies are suppressed. In addition we observe that entropic  effects due to configurational disorder favor a formation of a stable Zr-rich (TiZr)N phase with increasing temperature. Our calculations also predict that at high temperatures a Zr rich (TiZrAl)N disordered phase should become more resistant against the spinodal decomposition despite its high and positive formation energy due to the specific topology of the free energy surface at the relevant concentrations. Our experimental observations confirm this prediction by showing strong tendency towards decomposition in a Zr-poor sample while a Zr-rich alloy shows a greatly reduced decomposition rate, which is mostly attributable to binodal decomposition processes. This result highlights the importance of considering the second derivative of the free energy, in addition to its absolute value in predicting decomposition trends of thermodynamically unstable alloys.

Ort, förlag, år, upplaga, sidor
American Institute of Physics (AIP), 2014
Nationell ämneskategori
Fysik
Identifikatorer
urn:nbn:se:liu:diva-110682 (URN)10.1063/1.4905138 (DOI)000347170100078 ()
Anmärkning

On the day of the defence date the status of this article was Manuscript.

Tillgänglig från: 2014-09-18 Skapad: 2014-09-18 Senast uppdaterad: 2019-05-07Bibliografiskt granskad
Norrby, N., Rogström, L., Johansson Jöesaar, M. P., Schell, N. & Odén, M. (2014). In-situ x-ray scattering study of the cubic to hexagonal transformation of AlN in Ti1-xAlxN. Acta Materialia, 73, 205-214
Öppna denna publikation i ny flik eller fönster >>In-situ x-ray scattering study of the cubic to hexagonal transformation of AlN in Ti1-xAlxN
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2014 (Engelska)Ingår i: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 73, s. 205-214Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In the present work, we have studied the decomposition of arc evaporated Ti0.55Al0.45N and Ti0.36Al0.64N during heat treatment in vacuum by in-situ synchrotron wide angle x-ray scattering primarily to characterize the kinetics of the phase transformation of AlN from the cubic NaCl-structure to the hexagonal wurtzite-structure. In addition, in-situ small angle x-ray scattering measurements were conducted to explore details of the wavelength evolution of the spinodal decomposition, thus providing information about the critical size of the c-AlN rich domains prior to the onset of the h-AlN transformation. We report the fractional cubic to hexagonal transformation of AlN in Ti1-xAlxN as a function of time and extract activation energies between 320 and 350 kJ/mol dependent on alloy composition. The onset of the hexagonal transformation occurs at about 50 K lower temperature in Ti0.36Al0.64N compared to Ti0.55Al0.45N where the high Al content alloy also has a significantly higher transformation rate. A critical wavelength for the cubic domains of about 13 nm was observed for both alloys. Scanning transmission electron microscopy shows a c-TiN/h-AlN microstructure with a striking morphology resemblance to the c-TiN/c-AlN microstructure present prior to the hexagonal transformation.

Ort, förlag, år, upplaga, sidor
Elsevier, 2014
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:liu:diva-106506 (URN)10.1016/j.actamat.2014.04.014 (DOI)000337853100020 ()
Forskningsfinansiär
VINNOVA
Anmärkning

On the day of the defence date of the thesis the status of this article was Manuscript.

Tillgänglig från: 2014-05-09 Skapad: 2014-05-09 Senast uppdaterad: 2018-01-03Bibliografiskt granskad
Knutsson, A., Ullbrand, J., Rogström, L., Norrby, N., Johnson, L., Hultman, L., . . . Odén, M. (2013). Microstructure evolution during the isostructural decomposition of TiAlN: a combined in-situ small angle x-ray scattering and phase field study. Journal of Applied Physics, 113(21)
Öppna denna publikation i ny flik eller fönster >>Microstructure evolution during the isostructural decomposition of TiAlN: a combined in-situ small angle x-ray scattering and phase field study
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2013 (Engelska)Ingår i: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 113, nr 21Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This paper describes details of the spinodal decomposition and coarsening in metastable cubic Ti0.33Al0.67N and Ti0.50Al0.50N coatings during isothermal annealing, studied by in-situ small angle x-ray scattering, in combination with phase field simulations. We show that the isostructural decomposition occurs in two stages. During the initial stage, spinodal decomposition, of the Ti0.50Al0.50N alloy, the phase separation proceeds with a constant compositional wavelength of ∼2.8 nm of the AlN- and TiN-rich domains. The time for spinodal decomposition depends on annealing temperature as well as alloy composition. After the spinodal decomposition, the coherent cubic AlN- and TiN-rich domains coarsen. The coarsening rate is kinetically limited by diffusion, which allowed us to estimate the diffusivity and activation energy of the metals to 1.4 × 10−6 m2 s−1 and 3.14 eV at−1, respectively.

Nyckelord
TiAlN, Phase-field simulations, Spinodal decomposition, SAXS, High energy x-ray diffraction, Coarsening, Thin films
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:liu:diva-84702 (URN)10.1063/1.4809573 (DOI)000320674500034 ()
Tillgänglig från: 2012-10-17 Skapad: 2012-10-17 Senast uppdaterad: 2018-01-03Bibliografiskt granskad
Rogström, L., Ghafoor, N., Ahlgren, M. & Odén, M. (2012). Auto-organizing ZrAlN/ZrAlTiN/TiN multilayers. Thin Solid Films, 520(21), 6451-6454
Öppna denna publikation i ny flik eller fönster >>Auto-organizing ZrAlN/ZrAlTiN/TiN multilayers
2012 (Engelska)Ingår i: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 520, nr 21, s. 6451-6454Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The structural evolution during annealing of arc evaporated ZrAlN/ZrN andZrAlN/TiN multilayers is studied. On annealing, ZrN- and AlN-rich domains form within the ZrAlN sublayers. In the ZrAlN/TiN film, interdiffusion at the ZrAlN/TiN interfaces cause formation of a new cubic Zr(Al,Ti)N phase when annealed at temperatures above 900 C. The formation of this metastable phase results in a substantial increase in hardness of the film, which is retained to annealing temperatures of 1100 C. In the ZrAlN/ZrN film no secondary phases are formed and for annealing at temperatures above 800 C grain growth of the ZrN grains results in decreased hardness.

Ort, förlag, år, upplaga, sidor
Elsevier, 2012
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:liu:diva-75173 (URN)10.1016/j.tsf.2012.06.052 (DOI)000307286100001 ()
Anmärkning

funding agencies|VINN Excellence Center on Functional Nanoscale Materials (FunMat)||

Tillgänglig från: 2012-02-20 Skapad: 2012-02-20 Senast uppdaterad: 2017-12-07Bibliografiskt granskad
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