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Coatings of hydroxyapatite - nanosize alpha alumina composites on Ti-6Al-4V
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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
Journal
MATERIALS LETTERS
DOI
https://doi.org/10.1016/j.matlet.2005.07.020
Collections
Department of Engineering Sciences, Article