liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Face-Centered Cubic (Al1-xCrx)2O3
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.ORCID iD: 0000-0003-3203-7935
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Show others and affiliations
2011 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 519, no 8, 2426-2429 p.Article in journal (Refereed) Published
Abstract [en]

We report the discovery of a face-centered cubic (Al1−xCrx)2O3 solid solution [0.60bxb0.70] in films grownonto Si substrates using reactive radio frequency magnetron sputtering from Al and Cr targets at 400 °C. Theproposed structure is NaCl-like with 33% vacancies on the metal sites. The unit cell parameter is 4.04 Å asdetermined by X-ray diffraction. The films have a b100N preferred crystallographic orientation and exhibithardness values up to 26 GPa and an elastic modulus of 220–235 GPa.

Place, publisher, year, edition, pages
Elsevier , 2011. Vol. 519, no 8, 2426-2429 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-65698DOI: 10.1016/j.tsf.2010.11.052ISI: 000287631500008OAI: oai:DiVA.org:liu-65698DiVA: diva2:398416
Funder
Swedish Research Council
Note
Original Publication: Ali Khatibi, Justinas Palisaitis, Carina Höglund, Anders Eriksson, Per O. Å. Persson, Jens Jensen, Jens Birch, Per Eklund and Lars Hultman, Face-Centered Cubic (Al1-xCrx)2O3 , 2011, Thin Solid Films, (519), 2426-2429. http://dx.doi.org/10.1016/j.tsf.2010.11.052 Copyright: Elsevier Science B.V., Amsterdam. http://www.elsevier.com/ Available from: 2011-02-21 Created: 2011-02-17 Last updated: 2017-12-11Bibliographically approved
In thesis
1. Deposition and Phase Transformations of Ternary Al-Cr-O Thin Films
Open this publication in new window or tab >>Deposition and Phase Transformations of Ternary Al-Cr-O Thin Films
2011 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis concerns the ternary Al-Cr-O system. (Al1-xCrx)2O3 solid solution thin films with 0.6<x<0.7 were deposited on Si(001) substrates at temperatures of 400-500 °C by reactive radio frequency magnetron sputtering from metallic targets of Al and Cr in a flow controlled Ar / O2 gas mixture. As-deposited and annealed (Al1-xCrx)2O3 thin films were analyzed by x-ray diffraction, elastic recoil detection analysis, scanning electron microscopy, transmission electron microscopy, and nanoindentation. (Al1-xCrx)2O3 showed to have face centered cubic structure with lattice parameter of 4.04 Å, which is in contrast to the typical corundum structure reported for these films. The as-deposited films exhibited hardness of ~ 26 GPa and elastic modulus of 220-235 GPa. Phase transformation from cubic to corundum (Al0.32Cr0.68)2O3 starts at 925 °C. Annealing at 1000 °C resulted in complete phase transformation, while no precipitates of alumina and chromia were observed. Studies on kinetics of phase transformation showed a two-step thermally activated process; phase transformation and grain growth with the apparent activation energies 213±162 and 945±27 kJ/mol, respectively.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2011. 29 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1474
Keyword
Thin Films, Hard Coatings
National Category
Other Physics Topics
Identifiers
urn:nbn:se:liu:diva-65700 (URN)LIU-TEK-LIC-2011:13 (Local ID)978-91-7393-210-3 (ISBN)LIU-TEK-LIC-2011:13 (Archive number)LIU-TEK-LIC-2011:13 (OAI)
Presentation
2011-04-15, Hörsal Planck, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2011-12-05 Created: 2011-02-17 Last updated: 2016-08-31Bibliographically approved
2. Growth and Heat Treatment Studies of Al-Cr-O and Al-Cr-O-N Thin Films
Open this publication in new window or tab >>Growth and Heat Treatment Studies of Al-Cr-O and Al-Cr-O-N Thin Films
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Aluminum oxide based thin films are applied on cutting tool inserts as a top layer to protect the underlying nitride or carbide functional layer from the harsh working environment in terms of abrasive and chemical wear under thermal and pressure load. This Thesis explores the synthesis and characterization of the next generations of multifunctional wear-resistant thin film coatings in the form of Al-Cr-O and Al-Cr-O-N compounds. The experiments include the deposition of oxide films by reactive magnetron sputtering and cathodic arc evaporation as well as investigation of structural and mechanical properties in as-deposited and annealed states. Ternary (Al1-xCrx)2+yO3-y films were deposited on Si(001) and WC-Co substrates kept at 400-575 °C from elemental Al and Cr or alloyed Al/Cr cathodes in Ar/O2, O2/N2, and pure O2 atmospheres. Also, quaternary (Al1-xCrx)2+z(O1-yNy)3-z films were deposited at substrate temperature of ~400 °C on WC-Co substrates in O2/N2 atmosphere. X-ray diffraction and analytical electron microscopy combined with ab initio calculations showed the existence of a new face centered cubic (Al,Cr)2O3 phase with 33% vacancies on the metallic Al/Cr sites. Increasing the temperature during annealing of these metastable cubic films resulted in phase transformation to corundum solid solution in the temperature range of 900-1100 °C. The apparent activation energy of this phase transformation process was calculated as 380-480 kJ/mol by using the Johnson-Mehl-Avrami model. The mechanical properties of the cubic and corundum oxide films were measured in terms of nanoindentation hardness and metal cutting performance. The cubic and corundum films showed hardness values of 26-28 GPa and 28-30 GPa, respectively. The oxynitride solid solution films showed to be predominantly cubic Al-Cr-N and cubic-(Al,Cr)2O3 and secondary corundum-(Al,Cr)2O3 with a hardness of ~30 GPa, slightly higher than Al-rich ternary oxides. Metal cutting performance tests showed that the good wear properties are mainly correlated to the oxygen-rich coatings, regardless of the cubic or corundum fractions.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2013. 79 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1497
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-87668 (URN)978-91-7519-710-4 (ISBN)
Public defence
2013-02-12, Planck, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2016-08-31Bibliographically approved

Open Access in DiVA

fulltext(534 kB)632 downloads
File information
File name FULLTEXT02.pdfFile size 534 kBChecksum SHA-512
452f2cbdc15d9e65ef555672dc2196e2aba65ab0e5d7547c5f9afd8e69722f1acd8869688e1cc4911ca4e6f1a028892cf57add16e02d992fb014541bd1a0c718
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Khatibi, AliPalisaitis, JustinasHöglund, CarinaEriksson, AndersPersson, Per O. Å.Jensen, JensBirch, JensEklund, PerHultman, Lars

Search in DiVA

By author/editor
Khatibi, AliPalisaitis, JustinasHöglund, CarinaEriksson, AndersPersson, Per O. Å.Jensen, JensBirch, JensEklund, PerHultman, Lars
By organisation
Thin Film PhysicsThe Institute of Technology
In the same journal
Thin Solid Films
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 632 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 420 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf