Journal of Inorganic Materials

• Research Paper •     Next Articles

Superplasticity in Ceramics

YE Jian-Dong; CHEN Kai; A.Dominguez-Rodriguez+   

  1. Dept. of Inorpanic Materials; South China University of Tech. Guangzhou 510641 China; +Depto. de Fisica de La Materia Condensada; Universidad de Sevilla; Spain
  • Received:1997-04-09 Revised:1997-07-18 Published:1998-06-20 Online:1998-06-20

Abstract: Although ceramic materials are considered inherently brittle, superplastic behavior has been observed in many fine-grained ceramic materials with large elongation to failure at high temperatures. This
paper reviews the major features of superplasticity, the deformation characteristics and mechanism of yttria-stabilized tetragonal zirconia polycrystals, a typical superplastic ceramic, and the effects of dynamic
grain growth, glassy phase and concurrent cavitation on the deformation behavior of Y-TZP. The superplastic behavior of other ceramic materials, including Al2O3 Al2O3-Y2O3 stabilized tetragonal
zirconia composites, covalent ceramic materials, nanostructured ceramics, and glass-ceramics are also summarized.

Key words: ceramics, superplasticity, plastic deformation, ductility, grain growth, glassy phase

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