Journal of Thermal Spray Technology

, Volume 15, Issue 4, pp 623–627 | Cite as

Biocompatible nanostructured high-velocity oxyfuel sprayed titania coating: Deposition, characterization, and mechanical properties

Reviewed Papers

Abstract

Nanostructured titania (TiO2) coatings were produced by high-velocity oxyfuel (HVOF) spraying. They were engineered as a possible candidate to replace hydroxyapatite (HA) coatings produced by thermal spray on implants. The HVOF sprayed nanostructured titania coatings exhibited mechanical properties, such as hardness and bond strength, much superior to those of HA thermal spray coatings. In addition to these characteristics, the surface of the nanostructured coatings exhibited regions with nanotextured features originating from the semimolten nanostructured feedstock particles. It is hypothesized that these regions may enhance osteoblast adhesion on the coating by creating a better interaction with adhesion proteins, such as fibronectin, which exhibit dimensions in the order of nanometers. Preliminary osteoblast cell culture demonstrated that this type of HVOF sprayed nanostructured titania coating supported osteoblast cell growth and did not negatively affect cell viability.

Keywords

biomedical coating bond strength hardness hydroxyapatite nanostructured TiO2 

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Copyright information

© ASM International 2006

Authors and Affiliations

  • R. S. Lima
    • 1
  • B. R. Marple
    • 1
  • H. Li
    • 2
  • K. A. Khor
    • 2
  1. 1.National Research Council of CanadaBouchervilleCanada
  2. 2.Nanyang Technological University School of Mechanical and Aerospace EngineeringSingaporeSingapore

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