Hydroxyapatite coating on biodegradable AZ31 and Mg-Ca alloys prepared by RF-magnetron sputtering

Mukhametkaliyev, T., Surmeneva, M., Surmenev, R., and Mathan, B.K. (2015) Hydroxyapatite coating on biodegradable AZ31 and Mg-Ca alloys prepared by RF-magnetron sputtering. In: American Institute of Physics Conference Proceedings (1688) 030006. 030006-1. From: NEWOT 2015: 5th International Scientific Conference "New Operational Technologies", 29-30 September 2015, Tomsk, Russia.

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A thin film of hydroxyapatite (HA) was deposited on AZ31 and Mg-Ca alloys by using radio frequency (RF) magnetron sputtering. The thickness of the HA coating was determined to be 750 nm. The phase composition, microstructure, and surface morphology of the HA coatings were investigated using X-ray diffraction and scanning electron microscopy. In vitro degradation behaviour of the HA coated alloys was evaluated in simulated body fluid (SBF) and 3.5wt.% NaCl solution using electrochemical method. The coatings homogeneously covered the entire surface of the substrates. The coating structure corresponded to a nanostructured HA. The ultrathin coating significantly improved the degradation resistance of the alloy. Nanocrystalline HA coating significantly improved the corrosion resistance of the Mg-Ca and AZ31 magnesium alloys. The polarization resistance (Rp) of the coated Mg-Ca alloy was more than two-order of magnitude higher and the corrosion current density Icorr reduced by ∼ 98% as compared to the base alloy.

Item ID: 41392
Item Type: Conference Item (Research - E1)
ISBN: 978-0-7354-1335-1
ISSN: 1551-7616
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Proceedings of the 5th International Scientific Conference "New Operational Technologies"

Funders: Russian Science Foundation
Projects and Grants: Russian Science Foundation no. 14-13-00274
Date Deposited: 26 Nov 2015 01:08
FoR Codes: 09 ENGINEERING > 0903 Biomedical Engineering > 090301 Biomaterials @ 100%
SEO Codes: 86 MANUFACTURING > 8612 Fabricated Metal Products > 861201 Coated Metal and Metal-Coated Products @ 100%
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