Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1464676 | Ceramics International | 2009 | 10 Pages |
The structure, cell response and induction capability for apatite formation of the microarc oxidized (MAO) coating before and after chemical-treatment and subsequent dehydration at 400 °C were investigated. The surfaces of the chemically treated MAO (C-MAO) coatings before and after dehydration showed ribbon-like amorphous phase mainly containing Na, Ti and O elements with network morphology. Subsequent dehydration has no pronounced effect on the surface roughness, wetting ability, surface constituents and chemical state of Ti, Na and O of the C-MAO coating. The outer layers of the C-MAO coating before and after dehydration showed Na, Ti and O elements with uniform distributions along the surface depth. Chemical-treatment improves the apatite-forming ability of the MAO coating; however, subsequent dehydration greatly lowers that of the C-MAO coating, since it changed the ability of C-MAO coating to release Na+ ions, which is unfavorable for the formation of Ti-OH groups. The apatite formed on the two coatings contained HPO42− and CO32− ions. In addition, the dehydration of the C-MAO coating seemed to be unsuitable for the cell proliferation on its surface.