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Mechanism of improvement in oil spreadability of aluminium alloy-graphite particle composites

Krishnan, BP and Raman, N and Narayanaswamy, K and Rohatgi, PK (1981) Mechanism of improvement in oil spreadability of aluminium alloy-graphite particle composites. In: Tribology International, 14 (5). pp. 301-305.

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The spreadability of SAE-30 oil on Al-12 Si base (LM-13) alloy containing dispersed graphite particles about 50 μm average size in its matrix is found to be greater than on either LM-13 with no graphite or brass. It is also found that the spreadability on LM-13 base alloys increase with increasing volume of graphite dispersion in the matrix of these alloys. Further increases in the spreadability of oil on machined LM-13-graphite particle composite test surfaces occur if these are rubbed initially against control discs of either LM-13 or grey cast iron. The formation of a triboinduced graphite-rich layer, confirmed by esca, appears to be responsible for the improved oil spreadability on the rubbed test surfaces of LM-13 base alloys as compared to the as-machined test surfaces prior to rubbing. The triboinduced layer of graphite is apparently responsible for the observed reduction in the friction, wear and seizing tendency of triboelements made from aluminium alloy-graphite particle composites.

Item Type: Journal Article
Publication: Tribology International
Publisher: Elsevier Science
Additional Information: Copy right of this article belongs to Elsevier Science.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 13 Jan 2010 05:34
Last Modified: 19 Sep 2010 05:43
URI: http://eprints.iisc.ac.in/id/eprint/22825

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