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Indexed by: Journal Article

Date of Publication: 2010-07-15

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

Included Journals: EI、SCIE

Volume: 527

Issue: 18-19

Page Number: 4646-4649

ISSN: 0921-5093

Key Words: Al2O3/SiC composites; Flexural strength; Fracture toughness

Abstract: 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.