1007 自動車用Mg合金のDLC表面改質による高性能化(表面改質による機械の高性能化)

概要

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In recent years, It has been maked a positive approach about global environment problems in auto industry. As one of the countermeasures, weight saving is gone forward from iron and steel materials to light alloys. Magnesium alloy has been widely used because of its lightweight and ease recycling and so on. However, magnesium alloys are inferior in wear resistance. Therefore, it is necessary to improve this property to use magnesium alloy for more machine parts. So, in this study, DLC(Diamond Like Carbon) coating which are well known for their high hardness, low friction and excellent wear resistance was performed. In this case which DLC was coated on the soft material such as magnesium alloy, the adhesion strength between the substrate and the coating was important problem. So, in this study, in order to acquire the high adhesion strength, DLC coated process was performed by using UBMS(Unbalanced Magnetron Sputtering) method, and inter-layer which was doped Tungsten was formed on the substrate, and on the inter-layer two kinds of DLC coatings were laminated for nano order. Wear tests and fatigue tests were carried out. Magnesium alloy coated DLC indicated excellent wear friction. Furthermore, the fatigue reliability was elevated by DLC coatings compared with substrate only.
社団法人日本機械学会の論文
2007-09-28