Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/79770
Title: ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE (UHMWPE) FOR WEAR APPLICATIONS - COMPOSITE MAKING AND THE SURPRISING POLYMER ON METAL POLISHING EFFECTS
Authors: LIU YEMEI
Keywords: UHMWPE,polymer composite,wear,polymer-on-metal polishing effect,tribology,wear mechanism
Issue Date: 23-Jan-2014
Source: LIU YEMEI (2014-01-23). ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE (UHMWPE) FOR WEAR APPLICATIONS - COMPOSITE MAKING AND THE SURPRISING POLYMER ON METAL POLISHING EFFECTS. ScholarBank@NUS Repository.
Abstract: This PhD research is to evaluate the wear resistance of particle reinforcement of UHMWPE so as to find out possible ways to prevent UHMWPE wear debris generations. A large selection of fillers has been added into UHMWPE polymer matrix for wear properties analysis. The fillers used were nacre powder (also known as mother of pearl), perfluoropolyoxyalkane (PFPE) lubricant coatings, carbon nano tubes (CNT), poly ether ether ketone (PEEK) powder, nano alumina powder. The fillers chosen were inclusive of both micron sized powder and nano sized powder, also with lubrication coatings were tested. The results have found that filler reinforcement cannot improve UHMWPE polymer wear resistance, and the major reason is because adding hard fillers cannot increase UHMWPE polymer plastic flow energy cost, rather the hard fillers that come out during wear tests could contribute more abrasive wear of the polymer. Nevertheless, one exciting phenomenon has been found in this research that there is a polymer¿on metal counterface¿polishing effect. The gradual changes during the wear test on the metal counterface could reduce UHMWPE polymer wear effectively. This phenomenon provide a great and simple engineering solution to reduce UHMWPE wear debris generation, by rubbing the metal counterface with UHMWPE polymer or UHMWPE polymer composite for long enough time, and then placing the metal counterface into application, so as to prevent UHMWPE polymer wear debris generation during services. The research results have shown that the total UHMWPE polymer wear rate reduction could be even higher than 90%.
URI: http://scholarbank.nus.edu.sg/handle/10635/79770
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Cover Page.pdf10.82 kBAdobe PDF

OPEN

NoneView/Download
Content.pdf14.11 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

107
checked on Jan 20, 2018

Download(s)

139
checked on Jan 20, 2018

Google ScholarTM

Check


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