EFFECT OF CALCINATION ON CHARACTERISTICS AND SINTERING BEHAVIOR OF AL2O3-ZRO2 COMPOSITE POWDERS

被引：7

作者：

HWANG, CS

TSAUR, SC

机构：

[1] Department of Materials Engineering, National Cheng-Kung University, Tainan

来源：

JOURNAL OF MATERIALS SCIENCE | 1992年 / 27卷 / 24期

关键词：

D O I：

10.1007/BF01165970

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of calcination on the characteristics and sintering behaviour of zirconia-toughened alumina (ZTA) composite powders has been investigated. TiO2 was selected as an additive to promote the sinterability of ZTA powders. The starting materials were Al2O3 powder, Zr(OC3H7) 4 and Ti(OC3H7)4, and homogeneous ZTA powder containing Zr-O-Ti bonding was prepared. Calcination affected the tetragonal --> monoclinic phase transformation temperature of ZrO2 crystallizing from the gels. Calcination improved the densification rate of ZTA powder compact during sintering, which was attributed to the optimal ZrO2 particle size and distribution on the surface of alumina. A ZTA specimen with high bulk density and high tetragonal ZrO2 content was obtained under the conditions of 850-degrees-C/1 h calcination and 1500-degrees-C/1 h sintering.

引用

页码：6791 / 6796

页数：6

共 20 条

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