Relation between Friction Coefficient and Hydrogen Contents in Diamond Like Carbon Films

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  • ダイヤモンド状カーボン膜の水素含有量と摩擦係数の関係
  • ダイヤモンドジョウ カーボンマク ノ スイソ ガンユウリョウ ト マサツ ケイスウ ノ カンケイ

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Abstract

The pin-on-plate friction test was performed by using various kinds of DLC films to clarify the relation between the hydrogen content and the friction coefficient of DLC. As the test piece, twelve kinds of commercially available DLC coated specimens were prepared. Their hydrogen contents were determined by elastic recoil detection analysis (ERDA) method using 2 MeV of He ion beam from the tandem accelerator. As a result of the friction test, it became clear that the coefficient of friction tended to increase with increase of hydrogen content of DLC. By the Raman spectrum analysis, the debris adhered around the wear track were assigned as worn-out mixture of DLC and pin materials. Generation of this material was presumed to be the cause of low coefficient of friction discovery of DLC.

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