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

T. Mukhametkaliyev, M. Surmeneva, R. Surmenev, B. K. Mathan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationNew Operational Technologies, NEWOT 2015: Proceedings of the 5th International Scientific Conference "New Operational Technologies"
PublisherAmerican Institute of Physics Inc.
Volume1688
ISBN (Electronic)9780735413351
DOIs
Publication statusPublished - 17 Nov 2015
Event5th International Scientific Conference on New Operational Technologies, NEWOT 2015 - Tomsk, Russian Federation
Duration: 29 Sep 201530 Sep 2015

Conference

Conference5th International Scientific Conference on New Operational Technologies, NEWOT 2015
CountryRussian Federation
CityTomsk
Period29.9.1530.9.15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Mukhametkaliyev, T., Surmeneva, M., Surmenev, R., & Mathan, B. K. (2015). Hydroxyapatite coating on biodegradable AZ31 and Mg-Ca alloys prepared by RF-magnetron sputtering. In New Operational Technologies, NEWOT 2015: Proceedings of the 5th International Scientific Conference "New Operational Technologies" (Vol. 1688). [030006] American Institute of Physics Inc.. https://doi.org/10.1063/1.4936001