Volume 60, Issue 4 pp. 511-516

Evaluation of nanostructured carbonated hydroxyapatite coatings formed by a hybrid process of plasma spraying and hydrothermal synthesis

Yong Han

Corresponding Author

Yong Han

State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China

State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, ChinaSearch for more papers by this author
Kewei Xu

Kewei Xu

State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China

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Gillaume Montay

Gillaume Montay

Mechanical System Engineering Department, Universite de Technologie de Troyes, 10010 Troyes, France

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Tao Fu

Tao Fu

State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China

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Jian Lu

Jian Lu

Mechanical System Engineering Department, Universite de Technologie de Troyes, 10010 Troyes, France

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First published: 28 February 2002
Citations: 35

Abstract

Carbonated hydroxyapatite (CHA) coatings on a titanium alloy were prepared by hydrothermal synthesis of precursors plasma-sprayed with brushite as a raw powder. The structures, residual stresses, and bond strengths of the precursors and CHA coatings were investigated. The results showed that the sprayed precursors consisted of β-Ca2P2O7, α-Ca3(PO4)2, and CaHPO4, whereas the CHA coatings exhibited a unique phase construction, nanostructured and needlelike crystals, and a fairly low tensile residual stress. The bond strength of a CHA coating 200 μm thick was 15 MPa, equivalent to that of a plasma-sprayed hydroxyapatite (HA) coating. The evaluation of the CHA coatings was performed together with that of plasma-sprayed HA coatings immersed in distilled water. The dissolution and bond-strength degradation of the CHA coatings were much lower than those of the plasma-sprayed HA coatings. © 2002 Wiley Periodicals, Inc. J Biomed Mater Res 60: 511–516, 2002

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