Preparation and properties of nano-SiC strengthening Al2O3 composite ceramics

被引：16

作者：

Shi, Xiaolei ^{[1
]}

Dong, Yali ^{[1
]}

Xu, Fumin ^{[1
]}

Tan, Yi ^{[1
]}

Wang, Lai ^{[1
]}

Yang, Jenn-ming ^{[2
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China

[2] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 06期

关键词：

Al2O3-SiC; Polycarbosilane; Flexural strength; Fracture toughness; MECHANICAL-PROPERTIES; RESIDUAL-STRESS; POLYCARBOSILANE; BEHAVIOR;

D O I：

10.1016/j.msea.2010.11.085

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The processing and mechanical behaviors of Al2O3-xwt.%SiC(x = 1,2,5, ASx) nano-composites prepared by the in situ synthesis of SiC from polycarbosilane (PCS) were investigated. The composites were densified by hot pressing. The microstructure and mechanical properties of the sintered composites were analyzed. The results showed that a fully dense structure was obtained when a few nano-SiC were doped and that the fracture toughness and strength were highly improved compared with those of monolithic Al2O3. The fracture toughness reached 5.1 MPa m(1/2) in AS2 composite. The maximum flexural strength was 516 MPa obtained in AS1 composite. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2246 / 2249

页数：4

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