Effect of Bioceramic Coating Materials on Surface Hardness, Morphology and Coating Thickness

Year 2018, Volume: 1 Issue: 1, 9 - 17, 06.08.2018

Yakup Say , Bünyamin Aksakal

Abstract

Stainless steel Rex-734 biomedical alloy (ASTM F1586)
can be used as a new functional implant material with its extra ordinary
corrosion resistance and material properties. In order to functionalize such
material, Single Hydroxyapatite(HA) (S₁),  Hydroxyapatite-SiO₂ (S₂),
Hydroxyapatite-Ag (S₃) and Hydroxyapatite/Zr (S₄) dip
coatings were executed on Rex-734 implant alloy. Different coating thicknesses
for S₁, S₂, S₃ and S₄ groups were
obtained 12.4, 10.9, 11.1 and 10.3 µm, respectively. From the morphologic SEM
views, the better and crack free coating surfaces were found for HA/Zr (S₄)
group. The average hardness values for single HA coatings were found to be 290
HV.  In comparison with single coatings,
HA/SiO₂ coatings caused lower hardness (261 HV) and higher values
(312 HV) for HA/Ag double coatings, however, highest hardness was obtained (353
HV) for HA/Zr coatings. 

Keywords

Hydroxyapatite, REX-734, Silica, Silver, Sol-gel, Zr

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