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A Comparative Assessment of the Structural, Elastic and Electronic Properties of Nb3Pt and NbPt3 Phases Through First-Principles Study

[+] Author Affiliations
R. S. Fono-Tamo, Jen Tien-Chien

University of Johannesburg, Johannesburg, South Africa

O. Bhila

University of South Africa, Johannesburg, South Africa

Paper No. IMECE2018-86911, pp. V012T11A042; 6 pages
doi:10.1115/IMECE2018-86911
From:
  • ASME 2018 International Mechanical Engineering Congress and Exposition
  • Volume 12: Materials: Genetics to Structures
  • Pittsburgh, Pennsylvania, USA, November 9–15, 2018
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5217-0
  • Copyright © 2018 by ASME

abstract

Two phases of the Nb-Pt system namely Nb3Pt and NbPt3 have been studied using first principles approach in CASTEP. Structural, elastic and electronic properties of the concerned binary alloys were determined and examined against each other. Although both alloys have the same structure, it was observed that the percentage difference in the change of lattice parameters varied. Nb3Pt exhibited a 0.073% change while NbPt3 had a 14.809% change making Nb3Pt more stable structurally than NbPt3. The elastic properties showed that both binaries are ductile materials but NbPt3 proved to be more ductile than Nb3Pt based on Born, Pugh’s and Frantsevich’s criteria. Through the electronic properties, both binaries were proven to be conducting and their bonding nature seen as a combination of ionic metallic and covalent bond.

Copyright © 2018 by ASME
Topics: Elasticity , Alloys , Bonding

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