High vacuum tribology of polycrystalline diamond coatings

Mallik, Awadesh K and Shivashankar, SA and Biswas, SK (2009) High vacuum tribology of polycrystalline diamond coatings. In: Sadhana, 34 (5). pp. 811-821.

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Abstract

Polycrystalline diamond coatings have been grown on unpolished side of Si(100) wafers by hot filament chemical vapour deposition process. The morphology of the grown coatings has been varied from cauliflower morphology to faceted morphology by manipulation of the growth temperature from 700 degrees C to 900 degrees C and methane gas concentration from 3% to 1.5%. It is found that the coefficient of friction of the coatings under high vacuum of 133.32 x 10(-7) Pa (10(-7) torr) with nanocrystalline grains can be manipulated to 0.35 to enhance tribological behaviour of bare Si substrates.

Item Type:	Journal Article
Publication:	Sadhana
Publisher:	Indian Academy of Sciences
Additional Information:	Copyright for this article belongs to Indian Academy of Sciences.
Keywords:	Polycrystalline diamond coatings; hot filament CVD; high vacuum tribology
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	05 Jan 2010 11:37
Last Modified:	19 Sep 2010 05:54
URI:	http://eprints.iisc.ac.in/id/eprint/25327

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