Reactive Hot Pressing of Titanium Nitride–Titanium Diboride Composites at Moderate Pressures and Temperatures

Rangaraj, L and Divakar, C and Jayaram, V (2004) Reactive Hot Pressing of Titanium Nitride–Titanium Diboride Composites at Moderate Pressures and Temperatures. In: Journal Of The American Ceramic Society, 87 (10). pp. 1872-1878.

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Abstract

Dense composites in the Ti-B-N system have been produced by reactive hot pressing of titanium and BN powders. The effect of the addition of a small amount of nickel (1-3 wt%) on the reaction kinetics and densification of TiN-TiB2 (40 vol%) composite has been studied. Composites of similar to99% of theoretical density have been produced at 1600degreesC under 40 MPa for 30 min with 1% nickel. The hardness and fracture toughness of these composites are 24.5 +/- 0.97 GPa and 6.53 +/- 0.27 MPa.m(1/2), respectively. The microstructural studies on samples produced at lower temperatures indicate the formation of a transient liquid phase, which enhances the kinetics of the reaction and densification of the composite.

Item Type:	Journal Article
Publication:	Journal Of The American Ceramic Society
Publisher:	American Ceramic Society.
Additional Information:	Copyright of this article belongs to American Ceramic Society.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	19 Dec 2008 15:06
Last Modified:	19 Sep 2010 04:56
URI:	http://eprints.iisc.ac.in/id/eprint/17271

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