S0301-5-4 FPB前処理を施したDLC被覆部材の摩擦摩耗および疲労特性(軽合金と表面改質処理(2))

概要

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In order to clarify the effect of substrate surface on fatigue and tribological properties of steel which were modified diamond-like carbon (DLC) coating which are well known for their excellent tribological properties, fine particle bombardment (FPB) process was performed for pre-treatment before DLC coating process. Wear tests and fatigue tests were carried out. The friction coefficient of the DLC series with FPB process stabilized at low value of about 0.4 though the friction coefficient of Virgin series was higher and fluctuated widely. Furthermore, it is observed that the fatigue strength was increased by DLC coating with FPB process. From the fracture surface observations, it was clear that the fracture origin of the DLC series with FPB process was microbreaks in the coating which were occurred perpendicular to the loading axis and these microbreaks were occurred at early stage because DLC, which has high hardness, cannot deform in unison with the substrate, which has low hardness under cyclic loading.
社団法人日本機械学会の論文
2009-09-12