UNSPECIFIED (1995) ULTRAHIGH PRESSURE FABRICATION OF COMPOSITES CONTAINING SIC PLATELETS. BRITISH CERAMIC TRANSACTIONS, 94 (2). pp. 45-51. ISSN 0967-9782

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Abstract

SiC-Si3N4 ceramic composites were fabricated at ultrahigh pressure (4 GPa), with widely differing concentrations of WC platelets. The effects of these pressures on the resulting ceramic phases were investigated using X-ray diffraction, magic angle spinning nuclear magnetic resonance, and transmission electron microscopy. Striking evidence was found for a polytypic hexagonal to cubic phase transformation in the SiC platelets. Some evidence of microstructural toughening mechanisms was identified in the composites from observations made on crack propagation. However the ultrahigh pressure processing was found to induce residual stresses, causing a severe reduction in the fracture toughness of the composites.

Item Type:	Journal Article
Subjects:	T Technology > TP Chemical technology
Journal or Publication Title:	BRITISH CERAMIC TRANSACTIONS
Publisher:	INST MATERIALS
ISSN:	0967-9782
Date:	1995
Volume:	94
Number:	2
Number of Pages:	7
Page Range:	pp. 45-51
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/19812

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