Comparison of crystallinity between natural hydroxyapatite and synthetic cp-Ti /HA coatings
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ABM, ABC, ABPol
FapUNIFESP (SciELO)
FapUNIFESP (SciELO)
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Acesso aberto
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Resumo
Commercial purity titanium (cp-Ti), and some of its alloys are important materials in the medical field because of their excellent biocompatibility and mechanical properties. Recently a simple chemical method to induce bioactivity in these inert metallic materials was reported. In this work, the biomimetic chemical process has been used to modify the surface of cp-Ti with the formation of a deposit layer of apatite (a calcium phosphate compound). The main purpose was to study the influence of heat treatment on changes in crystallinity in the deposited phases. X-ray diffraction analysis and scanning electron microscopy showed that the apatite coatings heat treated between 400 and 600 °C were less crystalline, similar to biological apatites. Upon heat treatment at temperatures above 700 °C, the apatite coatings appeared more crystalline, and were a mixture of hydroxyapatite, octacalcium phosphate and magnesium phosphate.
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Inglês
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Materials Research. ABM, ABC, ABPol, v. 8, n. 2, p. 207-211, 2005.
