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Sintering mechanism; silicon carbide; aluminium nitride; polytype.

Sinterable silicon carbide powders were prepared by attrition milling and chemical processing of an acheson type 𝛼-SiC. Pressureless sintering of these powders was achieved by addition of aluminium nitride together with carbon. Nearly 99% sintered density was obtained. The mechanism of sintering was studied by scanning electron microscopy and transmission electron microscopy. This study shows that the mechanism is a solid sintering process.

M S Datta¹ A K Bandyopadhyay² B Chaudhuri¹

1. Department of Metallurgical Engineering, Jadavpur University, Kolkata 700 032, India
2. College of Ceramic Technology, Kolkata 700 010, India

Manuscript received

1 October 2001

Manuscript revised

8 February 2002