Phys. Rev. B 66, 174107 (2002) [10 pages]

Unified Landau description of the tetragonal, orthorhombic, and monoclinic phases of zirconia

Abstract

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Giuseppe Fadda^1,*, Lev Truskinovsky^2,†, and Giovanni Zanzotto^1,‡
¹Dipartimento di Metodi e Modelli Matematici per le Scienze Applicate (DMMMSA), Università di Padova, Via Belzoni 7, 35131 Padova, Italy
²Department of Aerospace Engineering and Mechanics, University of Minnesota, 110 Union Street SE, Minneapolis, Minnesota 55455

Received 6 May 2002; revised 16 July 2002; published 13 November 2002

We compute an explicit lowest-order polynomial form of the strain-dependent Gibbs potential which provides a unified description of the tetragonal, orthorhombic, and monoclinic phases of zirconia (ZrO₂). The resulting energy function interpolates well the available experimental data for this material, reproducing its known elastic moduli, equilibrium strains, and phase diagram to about 1700 K and 8 GPa.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.66.174107

DOI:

10.1103/PhysRevB.66.174107

PACS:

61.50.Ks, 62.20.-x, 81.30.Kf

^*Electronic address: fadda@dmsa.unipd.it

^†Electronic address: trusk@aem.umn.edu

^‡Electronic address: zanzotto@dmsa.unipd.it

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Phys. Rev. B 66, 174107 (2002) [10 pages]

Unified Landau description of the tetragonal, orthorhombic, and monoclinic phases of zirconia