Tribocorrosion behavior of DLC-coated Ti-6Al-4V alloy deposited by PIID and PEMS plus PIID techniques for biomedical applications

被引:50
作者
Hatem, Andre [1 ]
Lin, Jianliang [2 ]
Wei, Rougha [2 ]
Torres, Ricardo D. [1 ]
Laurindo, Carlos [1 ]
Soares, Paulo [1 ]
机构
[1] Pontificia Univ Catolica Parana, Dept Mech Engn, Polytech Sch, Rua Imaculada Conceicao,1155 Prado Velho, BR-80215901 Curitiba, PR, Brazil
[2] Southwest Res Inst, Surface Engn & Mat Chem, Mat Engn Dept, San Antonio, TX 78238 USA
关键词
Titanium alloy; DLC coatings; XPS; Raman spectroscopy; SEM; Adhesion; Hardness; Tribocorrosion; DIAMOND-LIKE CARBON; REVISION TOTAL HIP; A-C-H; AMORPHOUS-CARBON; TRIBOLOGICAL PROPERTIES; NANOCOMPOSITE COATINGS; ION-IMPLANTATION; PLASMA IMMERSION; RAMAN-SPECTRA; UNITED-STATES;
D O I
10.1016/j.surfcoat.2017.07.004
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
One of the main drawbacks observed from the usage of titanium alloys implants is the premature failures due to excessive wear and corrosion. Among the surface modification alternatives, Diamond-like carbon (DLC) coatings appear as a promisor candidate, since it has an amorphous structure chemically inert with desirable properties and still is a solid lubricant. Dense DLC coatings on biomaterials could be obtained by advanced vapor deposition techniques as the plasma immersion ion deposition (PIID) and the plasma enhanced magnetron sputtering (PEMS). This work aims to investigate the tribocorrosion behavior of DLC coatings systems, obtained by PHD only and PEMS + PIID hybrid techniques, applied on Ti-6Al-4V alloy samples for biomedical applications. The tribocorrosion tests were performed under phosphate-buffered saline (PBS) solution on the DLC-coated samples and compared to a Ti-6Al-4V bare alloy sample. Besides tribocorrosion tests, it were performed X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM), nanoindentation and scratch tests to evaluate the microstructure, morphology, mechanical properties and adhesion of the DLCcoated samples, respectively. The tribocorrosion tests demonstrated at least 5 times less friction coefficient and less than 2% of wear rate DLC-coated samples compared to Ti-6Al-4V bare alloy sample. Nevertheless, the results show that DLC coatings deposited by the advanced plasma enhanced techniques are very promissory to improve tribocorrosion behavior in Ti-6Al-4V alloy implants. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:223 / 232
页数:10
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