In vitro fatigue behavior of surface oxidized Ti35Zr10Nb biomedical alloy

被引：21
作者：
Leoni, A. [1 ]
Apachitei, I. [1 ]
Riemslag, A. C. [2 ]
Fratila-Apachitei, L. E. [1 ]
Duszczyk, J. [1 ]
机构：
[1] Delft Univ Technol, Dept Biomech Engn, NL-2628 CD Delft, Netherlands
[2] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands
来源：
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS | 2011年 / 31卷 / 08期
关键词：
Titanium; Biomaterials; Fatigue; Porous coating; Plasma electrolytic oxidation; PLASMA ELECTROLYTIC OXIDATION; MECHANICAL-PROPERTIES; TITANIUM-ALLOYS; COATINGS; PERFORMANCE; APATITE; AL;
D O I：
10.1016/j.msec.2011.08.010
中图分类号：
TB3 [工程材料学]; R318.08 [生物材料学];
学科分类号：
0805 ; 080501 ; 080502 ;
摘要：
New compositions of titanium alloys with low Young's modulus as well as multiple surface biofunctionalities are under intense research focus for biomedical applications due to the proven ability of titanium for enhancing implant integration. This study presents the effect of plasma electrolytic oxidation coating on the fatigue response of a novel beta-Ti35Zr10Nb alloy tested under physiological conditions (Hanks' solution at 37 degrees C). The electrolytic oxidation was conducted in calcium acetate/calcium glycerophosphate electrolyte that allowed incorporation of Ca and P within the oxide layer with potential benefits for bone apposition. The fatigue results revealed that the presence of oxide layers decreased significantly the fatigue strength of Ti35Zr10Nb alloy relative to uncoated condition. The specific coating morphology featuring interconnected micropores, microcracks, a scalloped coating/substrate interface, as well as the ceramic nature of the oxide layer was identified as the main factors responsible for the lower fatigue performance of the coated titanium alloy. (C) 2011 Elsevier B.V. All rights reserved.
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收藏
页码：1779 / 1783
页数：5
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