Evaluation of corrosion resistance and cytocompatibility of graded metal carbon film on Ti and NiTi prepared by hybrid cathodic arc/glow discharge plasma-assisted chemical vapor deposition. (August 2015)

• Record Type: Journal Article
• Authors: Jamesh, Mohammed Ibrahim; Li, Penghui; Bilek, Marcela M.M.; Boxman, R.L.; McKenzie, David R.; Chu, Paul K.
• Is Part Of: Corrosion science. Volume 97(2015)
• Page Start: 126
• Page End: 138
• Publication Date: 2015-08
• Subjects: B. EIS -- B. SEM -- B. XPS -- C. Amorphous structures; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2015.04.022
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Ti and carbon graded films are deposited on Ti and NiTi by hybrid plasma techniques. Ti and carbon graded interface is formed between substrate and surface carbon layer. The graded films enhances the corrosion resistance of Ti and NiTi significantly. The graded film on NiTi shows 14 times larger phase angle maxima at 10 5 Hz. Good cytocompatibility is observed in vitro . Abstract: Hybrid cathodic arc/glow discharge plasma-assisted chemical vapor deposition is used to prepare graded films on Ti and NiTi. XPS reveals the formation of a Ti and carbon graded interface between the substrate and carbon surface layer. The graded film significantly improves the corrosion resistance of Ti and NiTi in 154 mM NaCl as demonstrated by the smaller corrosion current density, larger resistance, and smaller capacitance. The graded film on NiTi shows near-capacitive impedance spectra and 14 times larger phase angle maxima at 10 5 Hz. In addition, the osteoblasts cells spread well on the graded film surface suggesting good cytocompatibility.