Mechanical behaviour of porous hydroxyapatite

被引：140
作者：
He, Li-Hong [1 ,2 ]
Standard, Owen C. [3 ]
Huang, Tiffany T. Y. [1 ,2 ]
Latella, Bruno A. [4 ]
Swain, Michael V. [1 ,2 ]
机构：
[1] Univ Sydney, Fac Dent, Biomed Res Unit, Sydney, NSW 2006, Australia
[2] Westmead Hosp, Westmead Ctr Oral Hlth, Sydney, NSW, Australia
[3] Univ New S Wales, Sch Mat Sci & Engn, Kensington, NSW 2033, Australia
[4] Australian Nucl Sci & Technol Org, Sydney, NSW, Australia
来源：
ACTA BIOMATERIALIA | 2008年 / 4卷 / 03期
关键词：
hydroxyapatite; porous structure; nanoindentation; mechanical properties; inelastic behaviour;
D O I：
10.1016/j.actbio.2007.11.002
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
The aim of the study was to investigate the role of microstructure and porosity on the mechanical behaviour of sintered hydroxyapatite. Hydroxyapatite disks with four different porosities were used in this investigation. With a nanoindentation system, elastic modulus, hardness, contact stress-strain relationship, energy absorption and indentation creep behaviour were investigated. The elastic modulus and hardness of hydroxyapatite exhibited an exponential relationship (e(-bP)) with the porosity P, which is similar to Rice's finding with the minimum solid area model. High porosity samples showed more substantial inelastic behaviour, including higher energy absorption, no linear elastic region in the contact stress-strain curve and some indentation creep behaviour. We conclude that porous microstructure endows hydroxyapatite with inelastic deformation properties, which are important in a material for bone substitution usage. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：577 / 586
页数：10
相关论文
共 36 条
[1]  
Ayers RA, 1999, J BIOMED MATER RES, V47, P54, DOI 10.1002/(SICI)1097-4636(199910)47:1<54::AID-JBM7>3.3.CO
[2]  
2-G
[3]   Viscoelastic properties of bone as a function of hydration state determined by nanoindentation [J].
Bembey, A. K. ;
Oyen, M. L. ;
Bushby, A. J. ;
Boyde, A. .
PHILOSOPHICAL MAGAZINE, 2006, 86 (33-35) :5691-5703
[4]  
BOYER HE, 1987, HARDNESS TESTING
[5]   AN EXPLANATION OF THE INDENTATION SIZE EFFECT IN CERAMICS [J].
BULL, SJ ;
PAGE, TF ;
YOFFE, EH .
PHILOSOPHICAL MAGAZINE LETTERS, 1989, 59 (06) :281-288
[6]   Indentation stress-strain curves for ''quasi-ductile'' ceramics [J].
FischerCripps, AC ;
Lawn, BR .
ACTA MATERIALIA, 1996, 44 (02) :519-527
[7]  
Gibson L.J., 1997, CELLULAR SOLIDS STRU, DOI DOI 10.1017/CBO9781139878326
[8]  
Guicciardi S, 2004, J AM CERAM SOC, V87, P2101, DOI 10.1111/j.1151-2916.2004.tb06366.x
[9]   Nanoindentation derived stress-strain properties of dental materials [J].
He, Li H. ;
Swain, Michael V. .
DENTAL MATERIALS, 2007, 23 (07) :814-821
[10]   Influence of pore geometry on the effective response of porous media [J].
Herakovich, CT ;
Baxter, SC .
JOURNAL OF MATERIALS SCIENCE, 1999, 34 (07) :1595-1609
1234