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论文类型： 期刊论文

发表时间： 2010-07-15

发表刊物： MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录刊物： SCIE、EI

卷号： 527

期号： 18-19

页面范围： 4646-4649

ISSN号： 0921-5093

关键字： Al2O3/SiC composites; Flexural strength; Fracture toughness

摘要： Al2O3/SiC composites were prepared by hot pressing with micrometer Al2O3 powders and SiC powders as raw materials. The mechanical properties, including flexural strength, hardness, and fracture toughness were studied. The experimental results showed that flexural strength was enhanced with the density increasing and grain refining. 615 MPa, the highest flexural strength was obtained in 20 wt.%SiC composite sintered at 1735 degrees C. The fracture toughness increased at first then decreased with SiC content variation. 7.6 MPa m(1/2) of the highest fracture toughness was obtained in the composite containing 5 wt.%SiC sintered at 1635 degrees C. (C) 2010 Elsevier B.V. All rights reserved.