Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/58322
Title: Friction and wear characteristics of Al-Cu/C composites synthesized using partial liquid phase casting process
Authors: Lim, S.C. 
Gupta, M. 
Ng, W.B.
Keywords: Anti-friction
Composites
Graphite
Rheocasting
Smearing
Wear
Issue Date: 1997
Source: Lim, S.C.,Gupta, M.,Ng, W.B. (1997). Friction and wear characteristics of Al-Cu/C composites synthesized using partial liquid phase casting process. Materials and Design 18 (3) : 161-166. ScholarBank@NUS Repository.
Abstract: During the sliding of aluminium alloys dispersed with graphite particulates, a layer of graphite is usually present at the sliding interface. This tribo-layer significantly reduces the amount of direct metal-to-metal contact, giving rise to low friction and a low rate of wear, making these composites useful candidate materials for anti-friction applications. Such self-lubricating composites are commonly fabricated via the squeeze casting, slurry casting or powder metallurgy route. These processes are expensive while the less-expensive conventional casting route is limited by the agglomeration of graphite particles in the composites, giving rise to poor mechanical properties. In this work, graphite particulate-reinforced Al-4.5 wt.% Cu composites with two effective graphite contents (Al-4.5 Cu/4.2 wt.% C and Al-4.5 Cu/6.8 wt.% C) were synthesized through an innovative partial liquid phase casting (rheocasting) technique, which is a modification of the conventional casting process. Unlubricated (without the use of conventional liquid lubrication) friction and wear performance of these composites as well as the un-reinforced aluminium alloy was determined using a pin-on-disk tester. The results revealed that the graphite-reinforced composites have a higher wear rate than the un-reinforced matrix alloy while their frictional characteristics are very similar within the range of testing conditions. Combining these with the information gathered from worn-surface examinations and wear-debris analysis, it is suggested that there exists a certain threshold for the amount and size of graphite particulates in these composites to enable them to have improved tribological properties. © 1998 Elsevier Science Ltd. All rights reserved.
Source Title: Materials and Design
URI: http://scholarbank.nus.edu.sg/handle/10635/58322
ISSN: 02613069
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

38
checked on Dec 8, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.