Microstructure and mechanical properties of ZrB2-SiC nanocomposite ceramic

被引：46
|
作者：
Liu, Qiang [1 ]
Han, Wenbo [1 ]
Hu, Ping [1 ]
机构：
[1] Harbin Inst Technol, Ctr Composite Mat, Harbin 150001, Peoples R China
来源：
SCRIPTA MATERIALIA | 2009年 / 61卷 / 07期
关键词：
Intragranular nanostructure; Mechanical properties; Microstructure; Fracture toughness; Nanocomposite;
D O I：
10.1016/j.scriptamat.2009.05.041
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A ZrB2-SiC nanocomposite ceramic in which 20 vol.% nanosized SiC powder was introduced into a ZrB2 matrix was fabricated by hot-pressing at 1900 degrees C for 60 min under a 30 MPa uniaxed load. The composite microstructure showed intragranular nanostructures that were peculiar to this material. Investigation of the mechanical properties revealed a flexural strength of 930 +/- 28 MPa and a fracture toughness of 6.5 +/- 0.3 MPa m(1/2). These improved mechanical properties were strongly dependent on the formation of the unusual intragranular nanostructures. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：690 / 692
页数：3
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