无机材料学报

• 研究论文 •    下一篇

陶瓷材料的超塑性

叶建东; 陈楷; A.Dominguez-Rodriguez+   

  1. 华南理工大学无机材料系; 广州 510641; +Depto.deFisicadelaMateriaCondensada; UniversidaddeSevilla; Spain
  • 收稿日期:1997-04-09 修回日期:1997-07-18 出版日期:1998-06-20 网络出版日期:1998-06-20

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

摘要: 虽然陶瓷材料在本质上是一种脆性材料;然而研究已表明细晶陶瓷材料具有超塑性,在高温下能产生很大的拉伸形变.本文综述了超塑性的特征和Y2O3稳定四方ZrO2多晶体这种典型的超塑性陶瓷材料的形变机理,形变特征以及动态晶粒生长、玻璃相和产生孔穴对其超塑性形变的影响,此外,还总结了其他陶瓷材料,包括Al2O3、Al2O3-Y2O3稳定四方ZrO2、纳米陶瓷和玻璃陶瓷的超塑性行为和特征.

关键词: 陶瓷, 超塑性, 塑性形变, 延展性, 晶粒生长, 玻璃相

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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