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標題: 電解沈積氧化鋯於生醫用CoCrMo F-75上之研究
The research of electrolytic ZrO2 coating on biomaterial F-75 CoCrMo
作者: 詹鴻政
Zhan, Hong-Zheng
關鍵字: 電解沈積;Electrolytic deposition;氧化鋯;燒結條件;鍍膜;單斜的相;正方晶;腐蝕電位;保護電位;生醫材料;鈷基合金;材料科學;工程;Zirconia;Sintering conditions;Coating;Monoclinic;Tetragonal;Corrosion potential;Protection protential;biomaterial;cobalt alloy;ZrO2;MATERIALS-SCIENCE;ENGINEERING
出版社: 材料工程研究所
AbstractThe electrolytic deposition of zirconia coating on
biomedical implant F-75 CoCrMo alloy was conducted in an aqueous
solution of zirconyl nitrate 〔ZrO(NO3)2〕. By controlling
different elertrochemical parameter ( concentration, potential,
time ) and different sintering conditions, the better one can be
determined. Through dynamic polarization tests, SEM/EDS, XRD,
AES/ESCA, wear tests and scratch tests, the characterization of
these ZrO2 coated specimens was investigated. Diagrams of XRD
showed that the zirconia films were monoclinic phase after
annealed at T1-t4 or T2-t4, tranformed to tetragonal phase after
annealed at T5-t4, and the mixture of the tetragonal and
monclinic phases at T7-t4. The cycle polarization test showed
that the substrate with zirconia exhibited a better protection
potential and a lower corrosion potential than the substrate
without zirconia. For the wear test with a loading stress of
60MPa, the ZrO2 coated and uncoated specimens were wore with
UHMWPE for 1500 cycles. After the wear test, no ZrO2 coated
films were peeled off. It indicates that the bonding strength
between ZrO2 and substrate are strong enough to prevent breaking
during exercise. Also, the wore qualities of UHMWPE to the ZrO2
coated specimen is an half of that to the uncoated specimen.
Obviously, the wear debris was reduced for the ZrO2 coated
CoCrMo alloy. Further, it can prolong the use life of implant
Appears in Collections:材料科學與工程學系

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