Biocompatible nanostructured high-velocity oxyfuel sprayed titania coating: Deposition, characterization, and mechanical properties
- 82 Downloads
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.
Keywordsbiomedical coating bond strength hardness hydroxyapatite nanostructured TiO2
Unable to display preview. Download preview PDF.
- 7.G.E. Kim, J. Walker Jr., and J.B. Williams Jr., “Nanostructured Titania Coated Titanium,” U.S. Patent 6,835,449, December 28, 2004Google Scholar
- 8.R.S. Lima, L. Leblanc, and B.R. Marple, Nanostructured and Conventional Titania Coatings for Abrasion and Slurry-Erosion Resistance (at 30° and 90°) Sprayed via APS, VPS and HVOF, pdf format (CD) in theProc. International Thermal Spray Conference 2005, DVS-Verlag GmbH, Düsseldorf, Germany, 2005Google Scholar
- 11.“Standard Test Method for Adhesion or Cohesion Strength of Thermal Spray Coatings,”Annual Book of ASTM Standard, ASTM, Vol. 02.05, p 1–7Google Scholar