期刊
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 64, 期 -, 页码 362-369出版社
ELSEVIER
DOI: 10.1016/j.msec.2016.03.100
关键词
Pulsed laser deposition; Glass-ceramics; Coatings; Mg-Ca alloy; Physico-chemical properties
资金
- Romanian National Authority for Scientific Research CNCS-UEFISCDI [271/2014, PNII-PT-PCCA 2013-4-2267]
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 pm 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. (C) 2016 Elsevier B.V. All rights reserved.
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