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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2010, Vol. 11 Issue (10): 766-770    DOI: 10.1631/jzus.A1000162
    
Microstructure and mechanical properties of liquid phase sintered silicon carbide composites
Jing-mei Ma, Feng Ye, Yan-ge Cao, Chun-feng Liu, Hai-jiao Zhang
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China, Air China Corporation Limited Engineering and Technology Branch, Beijing 101312, China
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Abstract  Silicon carbide (SiC) composites were prepared by hot-press sintering from α-SiC starting powders with BaAl2Si2O8 (BAS). The effects of additives on densification, microstructure, flexural strength, and fracture behavior of the liquid phase sintered (LPS) SiC composites were investigated. The results show that the served BAS effectively promotes the densification of SiC composites. The flexural strength and fracture toughness of the SiC composites can reach a maximum value of 454 MPa and 5.1 MPa·m1/2, respectively, for 40% (w/w) BAS/SiC composites. SiC grain pullout, crack deflection, and crack bridging were main toughening mechanisms for the sintered composites.

Key words： Silicon carbide (SiC)      BaAl2Si2O8 (BAS)      Liquid phase sintered (LPS)      Mechanical properties     
Received: 13 April 2010      Published: 05 October 2010
CLC:  TG146.2  
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Yan-ge Cao
Chun-feng Liu
Jing-mei Ma
Feng Ye
Hai-jiao Zhang
Cite this article:

Jing-mei Ma, Feng Ye, Yan-ge Cao, Chun-feng Liu, Hai-jiao Zhang. Microstructure and mechanical properties of liquid phase sintered silicon carbide composites. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2010, 11(10): 766-770.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1000162     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2010/V11/I10/766

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