Processing of HA-coated Ti-6Al-4V by a ceramic slurry approach: an in vitro study.
Hydroxyapatite-coated titanium alloy composite powders (Ti-6Al-4V/HA) was produced by a ceramic slurry approach. The aim was to evaluate the stability of the coating when subjected to a physiological medium simulated body fluid (SBF). Three consolidation conditions (700 degrees C for 5 h, 700 degrees C for 8 h and 700 degrees C for 11 h) were used in the production of the Ti-6Al-4V/HA composite powders. Results showed that biodissolution followed by apatite precipitation had taken place after soaking in SBF. In addition, it was found that consolidation at 700 degrees C for 5 h resulted in a weak mechanical locking of calcium phosphate on the Ti-6Al-4V surfaces; and the formation of small crystallites, which would increase the dissolution rate.
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School of Mechanical and Production Engineering, Nanyang Technological University, Singapore, Singapore.
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D000497:Alloys; D001672:Biocompatible Materials; D002516:Ceramics / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry*; D066298:In Vitro Techniques; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
D000497:Alloys; D001672:Biocompatible Materials; C031462:titanium alloy (TiAl6V4); D017886:Durapatite; D014025:Titanium