Chakrabarti, O P and Das, P K and Mondal, S (2001) Study of indentation induced cracks in MoSi2-reaction bonded SiC ceramics. Bulletin of Materials Science, 24 (2). 181 -184 . ISSN 0250-4707

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MoSi2-RBSC composite samples were prepared by infiltration of Si-2 at. % Mo melt into a preform of commercial SiC and petroleum coke powder. The infiltrated sample had a density > 92% of the theoretical density (TD) and microstructurally contained SiC, MoSi2, residual Si and unreacted C, The material was tested for indentation fracture toughness at room temperature with a Vicker's indenter and K-1C was found to be 4(.)42 MPa rootm which is around 39% higher than the conventional RBSC material. Enhancement in indentation fracture toughness is explained in terms of howing of propagating cracks through MoSi2/SiC interface which is under high thermal stress arising from the thermal expansion mismatch between MoSi2 and SiC.

Item Type: Article
Additional Information: International Conference on Fatigue and Fracture of Glasses, Ceramics and Composites Location: KOLKATA, INDIA Date: SEP, 1999 Sponsor(s): Mat Res Soc India
Uncontrolled Keywords: reaction bonded SiC; indentation hardness; fracture toughness
Subjects: Ceramic-Metal Systems
Divisions: Non-Oxide Ceramics & Composites
Depositing User: Mrs Chandana Patra
Date Deposited: 09 Mar 2012 07:40
Last Modified: 09 Mar 2012 07:40

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