Solid particle erosion studies on biomorphic Si/SiC ceramic composites

Amirthan, G and UdayaKumar, A and Prasad, VVB and Balasubramanian, M (2010) Solid particle erosion studies on biomorphic Si/SiC ceramic composites. Wear, 268. pp. 145-152. ISSN 0043-1648

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Abstract

Solid particle erosion tests were conducted on four different types of silicon carbide ceramic composites. The composites are cotton fabric based Si/SiC with and without chemical vapour infiltration, fine teak wood powder based Si/SiC and coarse teak wood powder based Si/SiC. The erodents used are angular SiC particles of average size 80, 250 and 450�m. The velocities with which particles impacted on the target materials were varied from 20 to 50 m/s. Similarly the angle of impact was varied from 20◦ to 90◦. Scanning electron microscopic observations on the eroded surface show brittle and cleavage like fracture. Fine teak wood powder based Si/SiC ceramic shows better erosion resistance than the other ceramics. Homogenous distribution of SiC grains with the presence of very fine grains of silicon and carbon is responsible for the improved erosion resistance. The higher erosion rate in cotton fabric based SiC arises from its microstructure. Here, the free carbon and free silicon grains are large in size and the SiC phase has very low hardness as compared to the erodent.

Item Type:	Article
Additional Information:	Copyright to this article belongs to M/s. Elsevier
Uncontrolled Keywords:	Solid particle erosion;Impact;Ceramic-matrix composite; High temperature
Subjects:	CHEMISTRY AND MATERIALS > Composite Materials
Depositing User:	Ms. Alphones Mary
Date Deposited:	01 Mar 2012 04:57
Last Modified:	01 Mar 2012 04:57
URI:	http://nal-ir.nal.res.in/id/eprint/10362

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