Toughening of alumina /zirconia ceramic composites with silver particles

被引：46

作者：

Lalande, J ^{[1
]}

Scheppokat, S ^{[1
]}

Janssen, R ^{[1
]}

Claussen, N ^{[1
]}

机构：

[1] Tech Univ Hamburg, Arbeitsbereich Techn Keram, D-21073 Hamburg, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2002年 / 22卷 / 13期

关键词：

Ag; Al2O3-ZrO2-Ag; composites; mechanical properties; toughness;

D O I：

10.1016/S0955-2219(02)00031-6

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Al2O3/ZrO2/Ag composites were obtained by intense attrition milling of silver and alumina powders with TZP balls. The characteristics of mixtures and the mechanical properties of sintered samples were investigated. Milling in acetone for 7 h results in a homogeneous submicron mixture, Ag composites (10 vol.%) CIPed at 300 MPa contain 8.1 vol.% tetragonal zirconia and 8.0 vol.% silver after sintering in air for 2 h at 1550 degreesC. Fracture toughness and bending strength as high as 5.44 MPa m and 586 MPa were obtained (645 MPa by post-HIPing). The incorporation of more silver (20 vol.%) is detrimental to microstructure quality and strength, but fracture toughness remains high thanks to crack bridging effects developed by ductile metallic inclusions. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：2165 / 2171

页数：7

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