Crack healing in liquid-phase-pressureless-sintered silicon carbide-aluminum nitride composites

被引：19

作者：

Magnani, Giuseppe ^{[1
]}

Beaulardi, Leandro ^{[2
]}

Brentari, Alida ^{[2
]}

Toyoda, Takehiro ^{[3
]}

Takahashi, Koji ^{[3
]}

机构：

[1] ENEA, Dept Phys Technol & New Mat, Bologna Res Ctr, I-40136 Bologna, Italy

[2] ENEA, Dept Phys Technol & New Mat, Faenza Res Ctr, I-48018 Faenza, Italy

[3] Yokohama Natl Univ, Div Mat Sci & Chem Engn, Yokohama, Kanagawa 2408501, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2010年 / 30卷 / 03期

关键词：

SiC; AlN; Crack healing; Mechanical properties; BEHAVIOR; OXIDATION; CERAMICS;

D O I：

10.1016/j.jeurceramsoc.2009.08.002

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：

Crack healing in liquid-phase-pressureless-sintered SiC-AlN composites was investigated by introducing cracks into specimens and subsequently heat-treating the specimens. It was observed that cracks were healed and the strength was recovered. Cracks were filled with silica or mullite produced by the oxidation of the composites. It was shown that the healing temperature could be fixed in the range 1100-1300 degrees C and that large cracks up to about 300 mu m could be healed completely. Our results imply that a simple oxidation heat-treatment can improve the reliability of silicon carbide-aluminum nitride components. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：769 / 773

页数：5

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