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Microstructural effects on the wear resistance of wrought and as‐cast Co‐Cr‐Mo‐C implant alloys
Author(s) -
SaldívarGarcía A. J.,
López H. F.
Publication year - 2005
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.30392
Subject(s) - materials science , alloy , cobalt , microstructure , isothermal process , metallurgy , tribology , carbon fibers , phase (matter) , wear resistance , composite material , composite number , chemistry , physics , organic chemistry , thermodynamics
The tribological behavior of two cobalt‐base alloys—an as‐cast high‐carbon and a wrought low‐carbon Co alloy—that are used as hip implant materials is examined in this work. This work discusses the experimental results of cobalt–cobalt wear pairs, in wrought and as‐cast conditions, where the amount of hexagonal phase is systematically modified through an isothermal aging treatment. Fully FCC and HCP Co alloys are tested versus alloys with various volume fractions of HCP phase (0.05 to 1.0 volume fractions). Preliminary results indicate that Co‐Cr‐Mo/Co‐Cr‐Mo alloy pairs both possessing an HCP matrix microstructure tend to exhibit outstanding wear properties. © 2005 Wiley Periodicals, Inc. J Biomed Mater Res, 2005