Mechanical properties of Al2O3-SiC-C composites using polycarbosilane as SiC precursor

被引：9

作者：

Shi, X. L. ^{[1
]}

Tan, Y. ^{[1
]}

Xu, F. M. ^{[1
]}

Dong, Y. L. ^{[1
]}

Zhang, Z. J. ^{[1
]}

Li, X. N. ^{[1
]}

Wang, L. ^{[1
]}

机构：

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

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 490卷 / 1-2期

关键词：

Al2O3-SiC composites; Polycarbosilane; Mechanical property; MICROSTRUCTURE;

D O I：

10.1016/j.jallcom.2009.10.052

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al2O3-SiC-C composites with varying amounts of SiC were prepared by hot pressing method where polycarbosilane (PCS) adopted as the precursor of SiC. The sintering quality, structure-phase state and mechanical properties of composites were measured and compared with Al2O3 monolithic. It was found that the flexural strength increased from 280 MPa for Al2O3 monolithic to the highest of 520 MPa for a 10wt.% SiC added Al2O3-SiC-C composite, and the fracture toughness was improved from 3.2 to 5.9 MPa m(1/2) at the same time. The reinforcement effects were discussed on considering the addition of SiC phase and free carbon in an Al2O3 composite matrix. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：484 / 487

页数：4

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