Microstructures and bond strengths of plasma-sprayed hydroxyapatite coatings on porous titanium substrates

  • Ik-Hyun Oh
  • N. Nomura
  • A. Chiba
  • Y. Murayama
  • N. Masahashi
  • Byong-Taek Lee
  • S. Hanada


Hydroxyapatite (HA) coating was carried out by plasma spraying on bulk Ti substrates and porous Ti substrates having a Young’s modulus similar to that of human bone. The microstructures and bond strengths of HA coatings were investigated in this study. The HA coatings with thickness of 200–250 μ m were free from cracks at interfaces between the coating and Ti substrates. XRD analysis revealed that the HA powder used for plasma spraying had a highly crystallized apatite structure, while the HA coating contained several phases other than HA. The bond strength between the HA coating and the Ti substrates evaluated by standard bonding test (ASTM C633-01) were strongly affected by the failure behavior of the HA coating. A mechanism to explain the failure is discussed in terms of surface roughness of the plasma-sprayed HA coatings on the bulk and porous Ti substrates.


Microstructure Titanium Surface Roughness Apatite Hydroxyapatite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • Ik-Hyun Oh
    • 1
  • N. Nomura
    • 2
  • A. Chiba
    • 2
  • Y. Murayama
    • 3
  • N. Masahashi
    • 3
  • Byong-Taek Lee
    • 4
  • S. Hanada
    • 3
  1. 1.Korea Institute of Industrial Technology (KITECH)Wolgye-Dong, Gwangsan-gu, GwangjuSouth Korea
  2. 2.Department of Welfare EngineeringIwate UniversityMoriokaJapan
  3. 3.Institute for Materials Research (IMR)Tohoku UniversitySendaiJapan
  4. 4.School of Advanced Materials EngineeringKongju National UniversityKongju City, ChungnamSouth Korea

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