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Journal of Inorganic Materials

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2007 , Vol. 22 >Issue 4: 754 - 758

DOI: https://doi.org/10.3724/SP.J.1077.2007.00754

Research Paper

Hydroxylapatite Coatings by Microplasma Spraying

  • HE Ding-Yong ,
  • SUN Xu-Feng ,
  • ZHAO Li-Dong
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  • 1. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China;
    2. Surface Engineering Institute, RWTH Aachen University, D-52070 Aachen, Germany

Received date: 2006-08-09

  Revised date: 2006-08-11

  Online published: 2007-07-20

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Abstract

HA coatings were deposited onto TiAl6V4 substrate by microplasma spraying (MPS) as well as by atmospheric plasma spraying (APS). The morphology, phase compositions and crystallinity of the coatings were studied by means of optical, scanning electron microscopy and X-ray diffraction. The results show that the decomposition of HA can be significantly reduced during MPS than during APS. In addition to HA, only β-TCP and amorphous phases form during MPS. MPS coating crystallinity is clearly influenced by spray distance. Shorter spray distances (<80mm) result in high crystallinities, which are much higher than those of APS coatings. But with a spray distance of 130 mm, the coating crystallinity is very low. β-TCP, α-TCP, TTCP, CaO and amorphous phases form during APS. Compared with APS coatings, MPS coatings are less decomposed during spraying, due to the less overheating of HA particles.

Key words： hydroxylapatite; microplasma spraying; coating

Cite this article

HE Ding-Yong , SUN Xu-Feng , ZHAO Li-Dong . Hydroxylapatite Coatings by Microplasma Spraying[J]. Journal of Inorganic Materials, 2007 , 22(4) : 754 -758 . DOI: 10.3724/SP.J.1077.2007.00754

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