Strain rate sensitivity of hydroxyapatite coatings

被引：9
作者：
Ahmed, H. S. Tanvir [1 ]
Jankowski, Alan F. [1 ]
机构：
[1] Texas Tech Univ, Lubbock, TX 79409 USA
来源：
THIN SOLID FILMS | 2011年 / 520卷 / 05期
关键词：
Hydroxyapatite; Coatings; Strain rate sensitivity; Scratch hardness; NANOSCRATCH; HARDNESS; SUBSTRATE; FILMS;
D O I：
10.1016/j.tsf.2011.06.004
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The strain-rate sensitivity of strength is a significant factor to evaluate the deformation mode of crystalline materials. The strain rate sensitivity of hardness is experimentally investigated here for hydroxyapatite coatings that are sputter deposited onto titanium-coated silicon wafers. These biocompatible HA coatings can provide a strong, dense interface between metal alloy implants and porous hydroxyapatite that can help ingrowth of tissue. The interface to the metal alloy implant is important to transfer stress during loading. So, it is very important to know the behavior of the coating under different conditions of loading. Our dynamic test procedure now takes advantage of nanoscratch testing to measure the change in scratch hardness of the coating over a strain rate range that may well simulate the mechanical loading conditions found at the interface between implants and hydroxyapatite coatings. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码：1516 / 1519
页数：4
相关论文
共 32 条
[1]  
[Anonymous], MET MAT
[2]  
[Anonymous], MAT LETT
[3]   Superplasticity in hard-to-machine materials [J].
Bieler, TR ;
Mishra, RS ;
Mukherjee, AK .
ANNUAL REVIEW OF MATERIALS SCIENCE, 1996, 26 :75-106
[4]  
BURWELL JT, 1952, PROC R SOC LON SER-A, V212, P470
[5]   BONE COMPRESSIVE STRENGTH - INFLUENCE OF DENSITY AND STRAIN RATE [J].
CARTER, DR ;
HAYES, WC .
SCIENCE, 1976, 194 (4270) :1174-1176
[6]   Bioactive nanocrystalline sol-gel hydroxyapatite coatings [J].
Chai, CS ;
Ben-Nissan, B .
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE, 1999, 10 (08) :465-469
[7]   Bioceramic coating of hydroxyapatite on titanium substrate with Nd-YAG laser [J].
Cheng, GJ ;
Pirzada, D ;
Cai, M ;
Mohanty, P ;
Bandyopadhyay, A .
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 2005, 25 (04) :541-547
[8]   Toward a quantitative understanding of mechanical behavior of nanocrystalline metals [J].
Dao, M. ;
Lu, L. ;
Asaro, R. J. ;
De Hosson, J. T. M. ;
Ma, E. .
ACTA MATERIALIA, 2007, 55 (12) :4041-4065
[9]  
Dasarathy H, 1996, J BIOMED MATER RES, V31, P81, DOI 10.1002/(SICI)1097-4636(199605)31:1<81::AID-JBM10>3.0.CO
[10]  
2-P
1234