Characterization and corrosion resistance of plasma sprayed HA and HA–SiO2 coatings on Ti–6Al–4V
By Singh, Gurpreet; Singh, Hazoor & Sidhu, Buta Singh
Published in Surface and Coatings Technology
NULL
2013
Abstract
The objective of this study is to evaluate corrosion resistance of plasma sprayed hydroxyapatite (HA) and hydroxyapatite–silicon oxide (SiO2) coated Ti–6Al–4V substrate. In HA–SiO2 coatings, 10 wt.% SiO2 was mixed with HA. The feedstock and coatings were characterized by X-ray diffraction and scanning electron microscopy/energy dispersive X-ray spectroscopy. The corrosion resistance was determined for the uncoated and two coatings. The corrosion resistance of the Ti–6Al–4V was found more after the deposition of the HA + 10 wt.% SiO2 rather than after HA coating and uncoated. Both HA, as well as, HA + 10 wt.% SiO2 coatings were crack free after 24 h dipping in Ringer's solution for electrochemical corrosion.
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