Nature of contact deformation of TiN films on steel

Bhowmick, S and Xie, ZH and Hoffman, M and Jayaram, V and Biswas, SK (2004) Nature of contact deformation of TiN films on steel. In: Journal Of Materials Research, 19 (9). pp. 2616-2624.

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Abstract

Nanoindentation experiments were carried out on a columnar similar to1.5-mum-thick TiN film on steel using a conical indenter with a 5-mum tip radius. Microstructural examination of the contact zone indicates that after initial elastic deformation, the deformation mechanism of the TiN is dominated by shear fracture at inter-columnar grain boundaries of the TiN film. A simple model is proposed whereby the applied load is partitioned between a deforming TiN annulus and a central expanding cavity in the steel substrate. It is possible to obtain a good fit to the experimental load-displacement curves with only one adjustable parameter, namely the inter-columnar shear fracture stress of the TiN film. The implication of results in the context of the performance of TiN films in service is also discussed.

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to Materials Research Society
Keywords:	SILICON-NIT
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	09 Nov 2004
Last Modified:	19 Sep 2010 04:17
URI:	http://eprints.iisc.ernet.in/id/eprint/2290

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