PRESSURELESS SINTERING OF SIC-WHISKER-REINFORCED AL2O3 COMPOSITES .2. EFFECTS OF SINTERING ADDITIVES AND GREEN BODY INFILTRATION

被引：15

作者：

LEE, HW ^{[1
]}

SACKS, MD ^{[1
]}

机构：

[1] UNIV FLORIDA,DEPT MAT SCI & ENGN,DIV CERAM,GAINESVILLE,FL 32611

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 07期

关键词：

alumina; composites; infiltration; sintering; whiskers;

D O I：

10.1111/j.1151-2916.1990.tb05241.x

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：

Pressureless sintering of SiC‐whisker‐reinforced Al2O3 composites was investigated. In Part II of the study, the effects of Y2O3/MgO sintering additives and green body infiltration on densification behavior and microstructure development are reported. Both sintering additives and green body infiltration resulted in enhanced densification. However, the infiltration approach was more effective for samples with high SiC whisker concentrations. Samples with 27 vol% whiskers could be pressureless sintered to ∼93% relative density and ∼3% open porosity. Fracture toughness values and microstructural features (e.g., grain size) for the infiltrated samples remained approximately the same as observed in the uninfiltrated samples. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：1894 / 1900

页数：7

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