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Influence of microstructure and phase composition on the nanoindentation characterization of bioceramic materials based on hydroxyapatite

Само за регистроване кориснике
2009
Аутори
Tang, C. Y.
Uskoković, Petar
Tsui, C. P.
Veliović, Đ.
Petrović, Rada
Janaćković, Đorđe
article (publishedVersion)
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Апстракт
The aim of the study was to investigate the influence of microstructure and phase composition on the mechanical behaviour of hydroxyapatite (HAp) and biphasic HAp/beta-tricalcium phosphate (beta-TCP) bioceramic materials using nanoindentation. The formation of beta-TCP phase in the HAp ceramic had the predominant influence on the nanomechanical properties of compact ceramics. For investigated microstructures there appear to be a slight decrease in the elastic modulus with increasing load and a higher decrease in hardness, which are in agreement with upper bounds of the results reported in literature. Maximal value of reduced modulus and hardness is yielded with pure HAp, and is measured to be 133.76 GPa for average grain size of 3 mu m and 12.18 GPa for average grain size of 140 urn, respectively. The average modulus and hardness results for HAP/beta-TCP ceramics with higher (101.61 GPa, 6.76 GPa) and lower grain size (115.72 GPa, 8.76 GPa) show sufficient mechanical properties in orde...r to serve as hard tissue replacement material.

Кључне речи:
Grain size / Mechanical properties / Apatite / Nanoindentation
Извор:
Ceramics International, 2009, 35, 6, 2171-2178
Издавач:
  • Elsevier Sci Ltd, Oxford
Финансирање / пројекти:
  • Research Grants Council of Hong KongHong Kong Research Grants Council [PolyU 5276/06E]
  • info:eu-repo/grantAgreement/MESTD/MPN2006-2010/142070/RS// (RS-142070)

DOI: 10.1016/j.ceramint.2008.11.028

ISSN: 0272-8842

WoS: 000267387500012

Scopus: 2-s2.0-67349273795
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URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1522
Колекције
  • Radovi istraživača / Researchers’ publications (TMF)
Институција/група
Tehnološko-metalurški fakultet

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