Chakrabarti, Omprakash and Das, Probal Kumar and Mukerji, Joydeb (1997) Influence of free silicon content on the microhardness of RBSiC. CFI-Ceramic Forum International , 74 (2). pp. 98-101. ISSN 0173-9913

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Abstract

Indentation microhardness of well characterised reaction bonded SiC (RBSIC) containing three different proportions of residual Si (16,5; 26,0 and 42,5 vol.%) has been investigated with varying loads (100...2000 g). Indentation microhardness was found to decrease as the residual Si-content increased. This is consistent with the rule of mixtures by the uniform, duplex RBSIC comprised essentially of SiC and Si. Load variant microhardness increases with indentation load; this behaviour is most pronounced with 42,5 vol.% residual Si. This may be explained by the increased interaction between the microindented cracks and the Si/SiC interfaces.

Item Type:	Article
Uncontrolled Keywords:	Non oxide ceramics;Structural ceramic;Silicon Carbides; Mechanical properties;Hardness;Microhardness;Property composition relationship;Silicon;Experimental study
Subjects:	Engineering Materials
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	17 Jul 2012 10:26
Last Modified:	17 Jul 2012 10:26
URI:	http://cgcri.csircentral.net/id/eprint/1602

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