Nb- and Cr-Al2O3 composites with interpenetrating networks

被引：27

作者：

Garcia, DE ^{[1
]}

Schicker, S ^{[1
]}

Janssen, R ^{[1
]}

Claussen, N ^{[1
]}

机构：

[1] Tech Univ Hamburg Harburg, Adv Ceram Grp, D-21071 Hamburg, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1998年 / 18卷 / 06期

关键词：

D O I：

10.1016/S0955-2219(97)00211-2

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：

Cr-Al2O3 and Nb-Al2O3 composites containing 50 vol% metal have been fabricated by pressureless sintering of compacts of attrition milled powder mixtures. Successful fabrication of high-strength and high toughness composites requires fine and homogeneous powders. Strength and fracture roughness of the composites increase with increasing milling time. Short milling times do not lead to the required particle fineness and powder homogeneity. For a composite containing 50 vol% Nb, strengths of up to 690 MPa with corresponding fracture toughness of 6.6 +/- 0.4 MPa m(1/2) and hardness of 11.2 GPa (H-V20) have been obtained, whereas strengths of 592 MPa, fracture roughness of 6.6 +/- 0.3 MPa m(1/2) and hardness of 9.3 GPa have been obtained for Cr-Al2O3 composites. (C) 1998 Elsevier Science Limited. All rights reserved.

引用

页码：601 / 605

页数：5

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