The Influence of Alumina Particle Dispersion and Test Parameters on Dry Sliding Wear Behaviour of Zinc-based Alloy.
IR@AMPRI: CSIR-Advanced Materials and Processes Research Institute, Bhopal
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Title |
The Influence of Alumina Particle Dispersion and Test Parameters on Dry Sliding Wear Behaviour of Zinc-based Alloy.
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Creator |
Dr., O. P. Modi
S., Rathod B K , Prasad A K , Jha G., Dixit |
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Subject |
Tribology
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Description |
The present investigation deals with dry sliding wear characteristics of a zinc-based alloy (ZA 37) with and without Al2
O3
particle
dispersion over a range of sliding speeds and applied pressures. The matrix alloy has been examined under identical test conditions in
order to examine the role played by the second phase alumina particles on wear behaviour. The observed wear behaviour of the samples
has been explained in terms of specific characteristics like cracking tendency, lubricating, load bearing and deformability characteristics,
and thermal stability of various microconstituents. The nature of predominance of one set of parameters (causing higher wear rate) over
the other (producing a reverse effect) was thought to actually control the wear behaviour. Examinations of the characteristic of wear
surfaces and subsurface regions also enabled to understand the operating wear mechanism and to substantiate the wear behaviour.
At low sliding speed, significantly lower wear rate of the matrix alloy over that of the composite was noticed. This has been attributed
to increased microcracking tendency of the composite than the matrix alloy. Reduced wear rate and higher seizure pressure experienced
by the composite over that of the matrix alloy at the higher sliding speeds could be explained to be due to enhanced compatibility of
matrix alloy with dispersoid phase and greater thermal stability of the composite in view of the presence of the dispersoid. The maximum
temperature rise due to frictional heating has been observed to be low in the case of matrix alloy than composite at low speed while the
trend reversed at higher speeds. In general, the wear rate and temperature increased with applied pressure and speed. Seizure pressure
reduced with increasing speed while the seizure resistance (pressure) of the matrix alloy was more adversely affected by speed than that of
the composite.
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Date |
2007
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Type |
Article
PeerReviewed |
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Identifier |
Dr., O. P. Modi and S., Rathod and B K , Prasad and A K , Jha and G., Dixit (2007) The Influence of Alumina Particle Dispersion and Test Parameters on Dry Sliding Wear Behaviour of Zinc-based Alloy. Tribology International, 40. pp. 1137-1140. ISSN 0301-679X
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Relation |
http://ampri.csircentral.net/577/
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