PMID- 15348592
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20050303
LR  - 20191026
IS  - 0957-4530 (Print)
IS  - 0957-4530 (Linking)
VI  - 13
IP  - 6
DP  - 2002 Jun
TI  - Friction and wear of hydroxyapatite reinforced high density polyethylene against 
      the stainless steel counterface.
PG  - 607-11
AB  - Hydroxyapatite (HA) reinforced high density polyethylene (HDPE) was invented as a 
      biomaterial for skeletal applications. In this investigation, tribological 
      properties (e.g. wear rate and coefficient of friction) of unfilled HDPE and 
      HA/HDPE composites were evaluated against the duplex stainless steel in dry and 
      lubricated conditions, with distilled water or aqueous solutions of proteins (egg 
      albumen or glucose) being lubricants. Wear tests were conducted in a custom-built 
      test rig for HDPE and HA/HDPE containing up to 40 vol % of HA. It was found that 
      HA/HDPE composites had lower coefficients of friction than unfilled HDPE under 
      certain conditions. HA/HDPE also exhibited less severe fatigue failure marks than 
      HDPE. The degradation and fatigue failure of HDPE due to the presence of proteins 
      were severe for low speed wear testing (100 rpm) as compared to high speed wear 
      testing (200 rpm). This was due possibly to the high shear rate at the contact 
      which could remove any degraded film instantaneously at high sliding speed, while 
      with a low sliding speed the build-up of a degraded layer of protein could occur. 
      The degraded protein layer would stay at the contact for a longer time and 
      mechanical activation would induce adverse reactions, weakening the surface layer 
      of HDPE. Both egg albumen and glucose were found to be corrosive to steel and 
      adversely reactive for HDPE and HA/HDPE composites. The wear modes observed were 
      similar to that of ultra-high molecular weight polyethylene. Specimens tested 
      with egg albumen also displayed higher wear rates, which was again attributed to 
      corrosion accelerated wear.
FAU - Wang, M
AU  - Wang M
AD  - School of Mechanical and Production Engineering, Nanyang Technological 
      University, Nanyang Avenue, Singapore 639798. mmwang@ntu.edu.sg
FAU - Chandrasekaran, M
AU  - Chandrasekaran M
FAU - Bonfield, W
AU  - Bonfield W
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Mater Sci Mater Med
JT  - Journal of materials science. Materials in medicine
JID - 9013087
EDAT- 2004/09/07 05:00
MHDA- 2004/09/07 05:01
CRDT- 2004/09/07 05:00
PHST- 2004/09/07 05:00 [pubmed]
PHST- 2004/09/07 05:01 [medline]
PHST- 2004/09/07 05:00 [entrez]
AID - 5089132 [pii]
AID - 10.1023/a:1015139213211 [doi]
PST - ppublish
SO  - J Mater Sci Mater Med. 2002 Jun;13(6):607-11. doi: 10.1023/a:1015139213211.