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Mechanical behaviour of porous hydroxyapatite

Paper ID Volume ID Publish Year Pages File Format Full-Text
2316 108 2008 10 PDF Available
Title
Mechanical behaviour of porous hydroxyapatite
Abstract

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.

Keywords
Hydroxyapatite; Porous structure; Nanoindentation; Mechanical properties; Inelastic behaviour
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Mechanical behaviour of porous hydroxyapatite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 4, Issue 3, May 2008, Pages 577–586
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us