Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5465587 | Surface and Coatings Technology | 2017 | 6 Pages |
Abstract
Nanoscale Ti-Ag-N/Ag multilayers were successfully deposited on the medical titanium alloy (Ti-6Al-4V) substrates using a multi-target magnetron co-sputtering system. The microstructure, mechanical properties and cytocompatibility were investigated. X-ray diffraction indicated that Ti-Ag-N/Ag multilayers exhibited Ag (111) and (220) textures at a thicker lAg (Ag layer thickness) of 6Â nm. The intensity of TiN (111) peak became gradually weak with lAg varying from 1.2 to 6Â nm. A thinner lAg of 1.2Â nm can block the growth of Ag grains and particles and stimulate the development of TiN (111) orientation, which led Ti-Ag-N/Ag multilayer to a highest hardness (20.5Â GPa), elastic modulus (260.7Â GPa) and fracture critical load (27.4Â mN). X-ray photoelectron spectrometer proved the presence of Ag, TiN, and TiO2 on the surface of Ti-Ag-N/Ag multilayers. Owing to Ag diffusion from Ag layer to TiN layer, Ag was embedded in the surrounding of TiO2 and TiN in Ti-Ag-N layer, which stimulated the photocatalytic activity of TiO2, and then resulted in an improvement in the cytocompatibility of Ti-Ag-N/Ag multilayers with the increased Ag concentration. This work proved that an appropriate Ag concentration can lead to a positive effect on hardness and fracture resistance and also induce negligible adverse effect on the cells growth.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
J.G. Yu, X.H. Sun, H.H. Gong, L. Dong, M.L. Zhao, R.X. Wan, H.Q. Gu, D.J. Li,