In-vitro study on apatite/titanium composite coatings with supersonic free-jet PVD

Atsushi Yumoto, Takahisa Yamamoto, Fujio Hiroki, Ichiro Shiota, Naotake Niwa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Hydroxyapatite (HAp) has many applications in the medical field. The objective of this study is to produce HAp/Ti composite coating with Supersonic Free-Jet PVD (SFJ-PVD). The SFJ-PVD is a technique to deposit nanoparticles with supersonic gas flow and to form a thick coating film. In a gas evaporation chamber, a source material is evaporated to form nanoparticles in an inert gas atmosphere. The nanoparticles are then carried to a substrate in a deposition chamber with an inert gas flow through a transfer pipe. The gas flow is generated by the pressure difference between the chambers and accelerated to the supersonic flow of 4.2 Mach through a specially designed supersonic nozzle. With SFJ-PVD, we obtain a uniform high-density HAp/Ti composite coating. XRD analysis reveals that the composite coating is composed of Ti and HAp. An in vitro study was carried out to investigate the bioactivity of the HAp/Ti composite coating under simulated body fluid.

Original languageEnglish
Pages (from-to)265-269
Number of pages5
JournalScience and Engineering of Composite Materials
Issue number4
Publication statusPublished - 2011 Dec


  • Bio-material
  • Nanoparticle
  • Simulated body fluid (SBF)
  • Supersonic gas flow

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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