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Influence of substrate material and surface finishing on the morphology of the calcium-phosphate coating

✍ Scribed by Leit�o, E. ;Barbosa, M. A. ;de Groot, K.

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
792 KB
Volume
36
Category
Article
ISSN
0021-9304

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✦ Synopsis

The formation of an apatite-like layer was achieved by immersing Ti-6Al-4V, Ti-Al-2.5Fe, and 316 L stainless-steel substrata in Hank's balanced salt solution (HBSS). The layer was characterized by surface analysis techniques, namely, X-ray microanalysis and X-ray diffraction, and the morphology was observed by scanning electron microscopy and atomic force microscopy. The concentrations of Ca and P were monitored as a function of time. The morphology of the precipitate layer seems to be dependent both on the type of metal substrate and its surface finish. Polished Ti-6Al-4V and Ti-Al-2.5Fe surfaces exhibit a plate precipitate morphology, whereas rougher surfaces show scattered crystal-like precipitation. The results suggest that the layer produced by immersion of polished titanium alloys in HBSS is constituted by an amorphous apatite.

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