Transactions of the Materials Research Society of Japan
Online ISSN : 2188-1650
Print ISSN : 1382-3469
ISSN-L : 1382-3469
Regular Papers
Surface Modification of Stainless Steel by Coating with DLC/Ti Bi-Layered Film Using Sputter-Deposition
Tsutomu SonodaSetsuo NakaoMasami Ikeyama
Author information
JOURNAL FREE ACCESS

2011 Volume 36 Issue 3 Pages 337-340

Details
Abstract

Surface modification of stainless steel was examined by coating with DLC/Ti bi-layered films using sputter-deposition, in order to improve not only the abrasion resistance of the stainless steel but also the adhesion between the deposited DLC film and the steel surface by relaxing the stress concentrated at the interface between them. For the comparison, the sputter-deposition of DLC monolithic films onto the stainless steel was also performed under the same sputtering conditions as for depositing the DLC layers of the bi-layered films. Under visual observation, the obtained DLC/Ti bi-layered films appeared to be adhesive while the DLC monolithic films deposited directly onto the substrates peeled off partly. Thus it was found that the DLC/Ti bi-layered films were more adhesive to the stainless steel than the DLC monolithic films. According to Raman spectroscopy, it was found that a typical spectrum for DLC coatings was detected for the obtained DLC/Ti bi-layered film, confirming that DLC coatings were also formed on the titanium layer. Furthermore, according to indentation hardness measurements, the surface hardness of the DLC/Ti bi-layered films was much higher than that of the stainless steel substrates while the surface hardness of the titanium films deposited on the stainless steel substrates was slightly lower than that of the stainless steel substrates. Thus it was found that the surface hardness of the stainless steel could be improved by coating it with the DLC/Ti bi-layered films. On the other hand, according to potentiodynamic polarization experiments, it was also found that the corrosion protective property of the stainless steel could be improved by this coating process. Therefore it was expected that both the abrasion resistance of the stainless steel and also the adhesion between the deposited DLC film and the steel substrate as well as the corrosion property could be improved at the same time.

Content from these authors
© 2011 The Materials Research Society of Japan
Previous article Next article
feedback
Top