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Indexed by:期刊论文

Date of Publication:2010-02-04

Journal:JOURNAL OF ALLOYS AND COMPOUNDS

Included Journals:SCIE、EI、Scopus

Volume:490

Issue:1-2

Page Number:484-487

ISSN No.:0925-8388

Key Words:Al2O3-SiC composites; Polycarbosilane; Mechanical property

Abstract: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.