Bending strength and crack-healing behavior of Al2O3/SiC composites ceramics

被引：41

作者：

Kim, Hae Sook ^{[3
]}

Kim, Mi Kyung ^{[4
]}

Kang, Sun Bae ^{[2
]}

Ahn, Seok Hwan ^{[1
]}

Nam, Ki Woo ^{[1
]}

机构：

[1] Pukyong Natl Univ, Coll Engn, Pusan 608739, South Korea

[2] Pukyong Natl Univ, Joint Lab Expt & Res, Pusan 608739, South Korea

[3] Pukyong Natl Univ, Grad Sch, Pusan 608739, South Korea

[4] Kyoto Univ, Grad Sch, Uji, Kyoto 6110011, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 483-84卷

关键词：

Al2O3/SiC composite ceramics; bending strength (sigma(b)); crack healing; multi-composite ceramics; additive powder Y2O3;

D O I：

10.1016/j.msea.2006.09.169

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Five kinds of ceramics were used to evaluate the bending strength under three-point bending. The bending test was carried out at room temperature. The crack-healing behavior and the bending strength of the crack-healed specimens were investigated from room temperature to 1723 K. The bending strength of Al2O3/SiC Composite ceramics is higher than that of Al2O3 monolithic. Al2O3/SiC composite ceramics could completely heal semicircular cracks with diameters 100 mu m. The bending strength of Al2O3/SiC composite ceramics significantly increased after heat treatment at 1573 K for 1 h in air. The crack-healing ability of Al2O3/SiC composite ceramics was the best in additive powder 3 wt.% Y2O3. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：672 / 675

页数：4

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