Tribological behavior of uncoated and DLC-coated CoCr and Ti-alloys in contact with UHMWPE and PEEK counterbodies

被引：26
|
作者：
Escudeiro, A. [1 ]
Wimmer, M. A. [2 ]
Polcar, T. [3 ]
Cavaleiro, A. [1 ]
机构：
[1] Univ Coimbra, SEG CEMUC Dept Mech Engn, P-3000 Coimbra, Portugal
[2] Rush Univ, Dept Orthopaed Surg, Med Ctr, Sect Tribol, Chicago, IL 60612 USA
[3] Univ Southampton, Sch Engn Sci, Southampton nCATS, Natl Ctr Adv Tribol, Southampton SO9 5NH, Hants, England
来源：
TRIBOLOGY INTERNATIONAL | 2015年 / 89卷
关键词：
Coating; Slidding; Polymer; Failure physics; DIAMOND-LIKE-CARBON; WEAR BEHAVIOR; COATINGS; POLYETHYLENE; PROSTHESIS; PARTICLES; POLYMERS; TITANIUM; STRESS; DEBRIS;
D O I：
10.1016/j.triboint.2015.02.002
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
There are very few studies of PEEK wearing against DLC. In this study, DLC and Zr-DLC coatings were deposited by magnetron sputtering onto Ti alloy substrates. Coated and un-coated Ti alloy samples were tribologically tested in multidirectional pin-on-disk equipment against UHMWPE and PEEK. CoCr alloy was also tested as control. Each of the materials was tested for 2 million cycles (Mc) in bovine serum lubricant (37 degrees C). Gravimetrical weight loss and changes in surface profile were similar when tested against UHMWPE. However, Zr-DLC samples delaminated after 1.2 Mc. When tested against PEEK, both coated samples delaminated, despite that the coatings maintained their structural integrity. The synergetic effect of stress-induced corrosion through biological fluid and high cyclic shear stress may have caused interface fatigue and subsequent delamination of both coatings. (C) 2015 Elsevier Ltd. All rights reserved.
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页码：97 / 104
页数：8
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