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

页码：304 / 310

页数：7