Diamond-like carbon films prepared by a low temperature periodic process for application in ventricular assist devices

Peipei Jing, Meili Zhang, Chris H. H. Chan, Fengjuan Jing, Jo P. Pauls, Matthew S. Dargusch, John F. Fraser, Yongxiang Leng Journal of Biomedical Materials Research DOI 10.1002/jbm.b.35213

Abstract: Due to the poor tribological properties of titanium (Ti) and its alloy Ti6Al4V (commonly used for ventricular assist devices manufacturing), diamond-like carbon (DLC) films with excellent anti-wear properties are pursued to improve the wear resistance of Ti and its alloys. Considering the effect of temperature on magnets inside pump impellers and workpiece deformation, DLC films are preferred to be prepared under low temperature. In this study, DLC films were prepared on Ti6Al4V alloys by periodic and continuous processes, and the corresponding maximum deposition temperature was 85 and 154°C, respectively.