Fracture toughness of alumina and ZTA ceramics: microstructural coarsening effects

被引：126

作者：

Casellas, D ^{[1
]}

Nagl, MM ^{[1
]}

Llanes, L ^{[1
]}

Anglada, A ^{[1
]}

机构：

[1] Univ Politecn Cataluna, Dept Ciencia Mat, ETSEIB, E-08080 Barcelona, Spain

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2003年 / 143卷

关键词：

ZTA; zirconia; alumina; fracture toughness; microstructural coarsening;

D O I：

10.1016/S0924-0136(03)00396-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of zirconia particles addition and microstructural coarsening, as a result of different heat treatments, on the fracture toughness of a monolithic alumina and a zirconia-toughened-alumina (ZTA) composite is studied. It is observed that addition of zirconia particles results in an enhancement of fracture toughness with respect to that exhibited by the alumina matrix. Similarly, microstructural coarsening within ZTA is found to produce a fracture toughness increment, mainly associated with the effect of zirconia particle size on their phase transformability. The obtained mechanical properties and grain growth kinetics are discussed in terms of microstructural features and operative toughening mechanisms. (C) 2003 Published by Elsevier B.V.

引用

页码：148 / 152

页数：5