Glass-ceramic coated Mg-Ca alloys for biomedical implant applications

J. V. Rau, I. Antoniac, M. Fosca, A. De Bonis, A. I. Blajan, C. Cotrut, V. Graziani, M. Curcio, A. Cricenti, M. Niculescu, M. Ortenzi, R. Teghil

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37 Citations (Scopus)

Abstract

Biodegradable metals and alloys are promising candidates for biomedical bone implant applications. However, due to the high rate of their biodegradation in human body environment, they should be coated with less reactive materials, such, for example, as bioactive glasses or glass-ceramics. Fort this scope, RKKP composition glass-ceramic coatings have been deposited on Mg-Ca(1.4 wt%) alloy substrates by Pulsed Laser Deposition method, and their properties have been characterized by a number of techniques. The prepared coatings consist of hydroxyapatite and wollastonite phases, having composition close to that of the bulk target material used for depositions. The 100 μm thick films are characterized by dense, compact and rough morphology. They are composed of a glassy matrix with various size (from micro- to nano-) granular inclusions. The average surface roughness is about 295 ± 30 nm due to the contribution of micrometric aggregates, while the roughness of the fine-texture particulates is approximately 47 ± 4 nm. The results of the electrochemical corrosion evaluation tests evidence that the RKKP coating improves the corrosion resistance of the Mg-Ca (1.4 wt%) alloy in Simulated Body Fluid.

Original languageEnglish
Pages (from-to)362-369
Number of pages8
JournalMaterials Science and Engineering C
Volume64
DOIs
Publication statusPublished - 1 Jul 2016
Externally publishedYes

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Keywords

  • Coatings
  • Glass-ceramics
  • Mg-Ca alloy
  • Physico-chemical properties
  • Pulsed laser deposition

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Rau, J. V., Antoniac, I., Fosca, M., De Bonis, A., Blajan, A. I., Cotrut, C., ... Teghil, R. (2016). Glass-ceramic coated Mg-Ca alloys for biomedical implant applications. Materials Science and Engineering C, 64, 362-369. https://doi.org/10.1016/j.msec.2016.03.100