期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 481, 期 1-2, 页码 877-880出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.03.142
关键词
Hot pressed; SiC; Microstructure; Mechanical properties; Thermal properties
资金
- National Outstanding Young Scientist Foundation [10725207]
- National Natural Science Foundation of China [50602010]
Hot pressed Zr-2(Al(Si))(4)C-5/SiC composites containing 0-30vol.% silicon carbide (SiC) particles have been investigated to determine the effect of composition (i.e. amount of SiC particles) on the microstructure, mechanical properties, and thermal properties. With increasing SiC volume contents, the Vickers' hardness, flexural strength, and fracture toughness of the composites were improved. Vickers' hardness. flexural strength, and fracture toughness increased from 12.2 GPa, 420 MPa and 4.64 MPa m(1/2) for monolithic Zr-2(Al(Si))(4)C-5 to 15.4 GPa, 592 MPa and 5.67 MPa m(1/2) for Zr-2(Al(Si))(4)C-5-30vol.% Sic, respectively. Specific heat capacity increased with Sic addition, while thermal conductivity decreased obviously with increasing SiC volume contents. The results here pointed to a potential method for improving strength and toughness of Zr-Al-C based ceramic composites. (C) 2009 Elsevier B.V. All rights reserved.
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