It was reported that CNx coating showed low friction coefficient less than 0.01 when it slid against Si3N4 ball in dry N2. It is suggested that the super-low friction was caused by the structural change of CNx surface to graphite-like structure during sliding in N2. In this study, to investigate the effect of N2 gas on shearing and adhesive strength of CNx, micro scratching tests were examined in N2 and air with a diamond tip (radius = 2.0 μm). Main results are the followings: (1) CNx surface after sliding in N2 against Si3N4 ball showed lower scratching friction coefficient in N2 than that in air. (2) Adhesive strength Si was estimated as 1/10 times lower than that in air.

Volume Subject Area:
Surface Engineering and Coatings
Keywords:
CNx, Friction coefficient, Scratching, Shearing strength, Adhesive strength, N2
Topics:
Adhesives, Coating processes, Coatings, Die cutting, Friction, Nitrogen, Shear strength, Shearing (Deformation)
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Copyright © 2005
 by ASME
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