B K , Prasad (2003) Influence of Some Material and Experimental Parameters on the Sliding Wear Behaviour of a Zinc-Based Alloy, Its Composite and a Bronze. Wear. pp. 35-46. ISSN 0043-1648

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Abstract

In this investigation, an attempt has been made to analyze the sliding wear response of a zinc-based alloy reinforced with 10 wt.% SiC particles over a range of applied pressures (prior to seizure) at the sliding speeds of 1.26 and 2.52 m/s. The (zinc-based) matrix alloy was also characterised under identical test conditions to see the influence of the dispersoid (SiC) phase on the wear behaviour. The wear response of the (zinc-based) matrix alloy and composite was compared with that of a conventional bearing bronze. Wear rate increased with pressure. The slope of the wear rate versus pressure plots was low at low pressures which increased significantly at high pressures. This was the observation made in all the test conditions except in the case of the (zinc-based) matrix alloy tested at the higher speed; one slope only (similar to the one prior to seizure at the low speed) was noted in the latter case. The bronze attained best wear performance (i.e. minimum wear rate and maximum seizure pressure) irrespective of test conditions. Incorporation of dispersoid (SiC) particles improved the wear resistance (inverse of wear rate) and seizure pressure of the (zinc-based) matrix alloy. Frictional heating reduced in the case of the composite as compared to that of the matrix alloy. Further, presence of the reinforced (SiC) particles increased the seizure temperature of the matrix alloy while the seizure temperature was the maximum for the bronze. Wear response of the samples has been discussed in terms of specific characteristics of various microconstituents like thermal stability, load bearing and lubricating characteristics, and protection offered by the harder phase to the softer one. The wear behaviour has been substantiated through the characteristics of wear surfaces, subsurface regions and debris particles of the specimens.

Item Type:	Article
Subjects:	Material/Component Development, Processing and Characterization > Tribology
Divisions:	UNSPECIFIED
Depositing User:	Mr. B.K. Prasad
Date Deposited:	24 Jul 2013 11:10
Last Modified:	24 Jul 2013 11:10
URI:	http://ampri.csircentral.net/id/eprint/90

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