Fabrication and mechanical properties of ZrB2-SiCw ceramic matrix composite

被引：76

作者：

Zhang, Xinghong ^{[1
]}

Xu, Lin ^{[1
]}

Du, Shanyi ^{[1
]}

Han, Jiecai ^{[1
]}

Hu, Ping ^{[1
]}

Han, Wenbo ^{[1
]}

机构：

[1] Harbin Inst Technol, Ctr Composite Mat, Harbin 150001, Peoples R China

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 6-7期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

zirconium diboride; SiC whisker; microstructure; mechanical properties;

D O I：

10.1016/j.matlet.2007.07.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A ZrB2 based ceramic matrix composite containing 20 vol.% Sic whisker was fabricated at 1800 degrees C for 1 h under a uniaxial load of 40 MPa by hot-pressing. The microstructure and mechanical properties of the composite were investigated. It was shown that mechanical properties were improved by introduction of Sic whisker, especially for the fracture toughness. The fracture toughness was similar to 5.97 +/- 0.3 MPa m(0.5), which was much higher than that of monolithic ZrB2 and SiC particle reinforced ZrB2 Composite. The toughening mechanisms were Whisker bridging, crack deflection around whiskers as well as whisker pull-out and fracture. The results presented here point to a potential method for improving fracture toughness of ultra-high temperature ceramic. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1058 / 1060

页数：3

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