Rev. Phys. Appl. (Paris) 23, 565-569 (1988)
DOI: 10.1051/rphysap:01988002304056500

Transformation plasticity and thermoelastic behavior in ZrO2 -containing ceramics

A.H. Heuer et R.-R. Lee

Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, U.S.A.

Abstract
Transformation plasticity in ZrO2, which is responsible for the high strength and high toughness of advanced ZrO2-based ceramics, is reviewed. The tetragonal → monoclinic martensitic transformation is of prime importance, but its successful exploitation requires a good deal of microstructural control. Under certain conditions, the transformation can be reversible, autocatalytic, and thermoelastic.

Résumé
On passe en revue la plasticité de transformation dans ZrO2, qui est responsable de la résistance mécanique et de la grande ténacité des nouvelles céramiques à base de ZrO 2. La transformation martensitique tétragonale-monoclinique est un paramètre essentiel, mais il faut une grande maîtrise de la microstructure pour en tirer profit. Dans certaines conditions, cette transformation est réversible, autocatalytique et thermoélastique.

PACS
6220F - Deformation and plasticity.
6470K - Solid solid transitions.
8130K - Martensitic transformations.
8140J - Elasticity and anelasticity.
8140L - Deformation, plasticity and creep.

Key words
ceramics -- martensitic transformations -- plasticity -- thermoelasticity -- zirconium compounds -- transformation plasticity -- thermoelastic behavior -- strength -- toughness -- ZrO sub 2 based ceramics -- tetragonal to monoclinic martensitic transformation -- microstructural control -- autocatalytic -- ZrO sub 2 MgO -- ZrO sub 2 Y sub 2 O sub 3 MgO