Indentation and scratch testing of DLC-Zr coatings on ultrafine-grained titanium processed by high-pressure torsion

被引：45
|
作者：
Wang, Chuan Ting [1 ,2 ]
Escudeiro, Ana [3 ]
Polcar, Tomas [1 ]
Cavaleiro, Albano [3 ]
Wood, Robert J. K. [1 ]
Gao, Nong [2 ]
Langdon, Terence G. [2 ,4 ,5 ]
机构：
[1] Univ Southampton, Fac Engn & Environm, Natl Ctr Adv Tribol Southampton, Southampton SO17 1BJ, Hants, England
[2] Univ Southampton, Mat Res Grp, Fac Engn & Environm, Southampton SO17 1BJ, Hants, England
[3] Univ Coimbra, SEG CEMUC Dept Mech Engn, P-3030788 Coimbra, Portugal
[4] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[5] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
来源：
WEAR | 2013年 / 306卷 / 1-2期
基金：
英国工程与自然科学研究理事会;
关键词：
High-pressure torsion; Titanium; DLC-Zr coatings; Adhesion; Bio-implants; SEVERE PLASTIC-DEFORMATION; CARBON THIN-FILMS; MECHANICAL-PROPERTIES; ROOM-TEMPERATURE; PURE TITANIUM; WEAR BEHAVIOR; ADHESION; HARDNESS; ALLOY; STRENGTH;
D O I：
10.1016/j.wear.2012.12.033
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
High-pressure torsion was employed to refine the microstructure of grade 2 Ti under an imposed pressure of 3.0 GPa at room temperature. The microhardness of grade 2 Ti increased from 1.82 GPa for the coarse grain state to 3.05 GPa after high-pressure torsion processing, where this value is very close to the hardness of the Ti-6Al-4V alloy. Subsequently, several diamond-like carbon (DLC) coatings with thicknesses of similar to 1.4 mu m were deposited on as-received Ti, high-pressure torsion processed Ti and Ti-6Al-4V samples via physical vapour deposition. Both indentation and scratch tests showed a much improved adhesion of DLC-7Zr, DLC:H-7Zr and DLC-9Zr coatings with high-pressure torsion processed Ti as the substrate by comparison with the same coatings on coarse-grained Ti. The results suggest that commercial pure Ti processed by high-pressure torsion and coated with a diamond-like carbon coating provides a potential candidate material for bio-implant applications. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：304 / 310
页数：7
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