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Prediction of MAX phases, VN+1SiCN (N=1,2), from first-principles theory
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
2007 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 101, no 1, 013511- p.Article in journal (Refereed) Published
Abstract [en]

We have investigated the phase stability of two MAX phases, V3SiC2 and V2SiC, by means of first-principles total-energy calculations within the generalized-gradient approximation and the projector-augmented wave method. The theoretical bulk modulus of V3SiC2 is 219 GPa, which is similar to 17% larger than that of Ti3SiC2 (187 GPa). The total-energy calculations show that V2SiC is stable with a formation energy of about 0.27 eVf.u. and that V3SiC2 is metastable (only 0.02 eVf.u. is required to stabilize this phase from its competing phases). We suggest that both these two MAX compounds should be possible to synthesize as stable (or metastable) phases using, e.g., thin-film deposition.

Place, publisher, year, edition, pages
2007. Vol. 101, no 1, 013511- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-146374DOI: 10.1063/1.2405721ISI: 000243585200031OAI: oai:DiVA.org:uu-146374DiVA: diva2:398404
Available from: 2011-02-17 Created: 2011-02-16 Last updated: 2017-12-11Bibliographically approved

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Ahuja, RajeevEriksson, Olle

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