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论文类型： 期刊论文

发表时间： 2010-02-04

发表刊物： JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物： SCIE、EI、Scopus

卷号： 490

期号： 1-2

页面范围： 484-487

ISSN号： 0925-8388

关键字： Al2O3-SiC composites; Polycarbosilane; Mechanical property

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.