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標題: Electrolytic Al2O3 coating on Co-Cr-Mo implant alloys of hip prosthesis
作者: Yen, S.K.
Hsu, S.W.
關鍵字: electrolytic Al2O3 coating;Co-Cr-Mo implant alloy;hip prosthesis;metal-ion release;corrosion behavior;wear debris;replacement;combination;zirconia;uhmwpe;joints
Project: Journal of Biomedical Materials Research
期刊/報告no:: Journal of Biomedical Materials Research, Volume 54, Issue 3, Page(s) 412-418.
The ceramic films over metallic implant surfaces have-the potential to improve implant performance with respect:to implant fixation, wear, or corrosion. In this study, the electrolytic Al2O3 coatings on 1-1537 Co-Cr-Mo alloy were conducted in an aqueous solution of Al(NO3)(3). Through the cycle polarization test in Hank's solution, it was found that the corrosion potential and protection potential of the alumina-coated were higher than that of the uncoated, and the corrosion current density was lower. The phase transformation of Al2O3 film on Co-Cr-Mo alloy annealed at 800 K revealed todlite (5Al(2)O(3) . H2O) and theta Al2O3 (113) preferred orientation for 20 min, and theta Al2O3 (200) preferred orientation with eta phase for 80 min. Scanning electron microscopy/energy dispersive spectroscopy observations after the scratch tests showed that the adhesion of the alumina films on Co-Cr-Mo alloy can load a stress over the yield strength (450 MPa) of Co-Cr-Mo alloy. The wear loss of ultra-high molecular-weight polyethylene to the Al2O3-coated specimen was eight times less than that to the uncoated. It is concluded that such Al2O3-coated films on Co-Cr-Mo implant alloy exhibit excellent quality in corrosion, adhesion, and wear for the application of hip prosthesis. (C) 2000 John Wiley & Sons, Inc. J Biomed Mater Res 54: 412-418, 2001.
ISSN: 0021-9304
Appears in Collections:材料科學與工程學系

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