Coatings of hydroxyapatite - nanosize alpha alumina composites on Ti-6Al-4V

Date

2005-12-01

Author

Evis, Zafer
Doremus, RH

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Composites of hydroxyapatite (HA) and nanosize-alpha-(alpha)-Al2O3 with 5 wt.% CaF2 were coated on Ti-6Al-4V rods by cold pressing and sintered in air or argon atmosphere at 1100 degrees C to improve the bonding between the metal and the ceramic. 25 and 40 wt.% alpha-Al2O3-5 wt.% CaF2-HA composites gave the best results of strong bonding. 25 wt.% alpha-Al2O3-5 wt.% CaF2-HA and Ti-6Al-4V showed the same thermal expansion coefficients. The thermal expansion coefficient of the 40 wt.% alpha-Al2O3-5 wt.% CaF2-HA composite was slightly smaller than that of Ti-6Al-4V, which created a compressive stress on the coating, resulting in improved bonding between the metal and the ceramic.

Subject Keywords

Mechanical Engineering, General Materials Science, Mechanics of Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/46129

Collections

Department of Engineering Sciences, Article