Publication details

Authors: Kotoka, R.; Konchady, M.; Ramakrishnan, G.; Yarmolenko, S.; Pai, D.; Sankar, J. 
Title: High throughput corrosion screening of Mg-Zn combinatorial material libraries 
Type: Journal Article 
Year: 2016 
Volume: 108 
Start Page: 42 
End Page: 50 
DOI: 10.1016/j.matdes.2016.06.078 
Abstract: Mg-Zn combinatorial material libraries covering 15-85 at.% Mg were deposited on glass substrates using magnetron sputtering at room temperature. To study the phases present in the Mg-Zn combinatorial libraries the as deposited sample was annealed at 250 degrees C for an hour. The composition, phase content and thickness were characterized using energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and stylus profilometer respectively. The corrosion characteristics of the as-deposited and annealed combinatorial samples immersed in DPBS and PBS were evaluated using a high throughput novel optical screening technique. Corrosion maps of the combinatorial samples were generated from analysis of time lapsed images obtained from the novel optical screening technique. From the time lapsed images the corrosion rate of each composition in the combinatorial material libraries were evaluated. The results showed that compositions with Mg contents at.% resulted in lower but similar corrosion rate for both as-deposited and annealed samples immersed in DPBS. The corrosion rate increases with increasing Mg content. (C) 2016 Elsevier Ltd. All rights reserved. 
Keywords: combinatorial material libraries, magnetron sputtering, optical corrosion screening, mg-zn alloy, thin-film alloys, magnesium alloys, mechanical-properties, degradation behavior, peo coatings, ca alloys, in-vivo, resistance, microstructure, biomaterials