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Indexed by:期刊论文

Date of Publication:2011-03-15

Journal:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Included Journals:SCIE、EI

Volume:528

Issue:6

Page Number:2246-2249

ISSN No.:0921-5093

Key Words:Al2O3-SiC; Polycarbosilane; Flexural strength; Fracture toughness

Abstract: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.