Patent ID: 9062274
Filing Date: 2015-06-23
Classification: C10M,C10N,C23C

Abstract:
1. A low friction sliding member to be used under a wet condition, comprising: a substrate; and an amorphous hard carbon film farmed on a surface of the substrate and in sliding contact with a mating material, the amorphous hard carbon film being coated with a lubricant oil, wherein: the lubricant oil is free from molybdenum and includes at least one of zinc (Zn), calcium (Ca), magnesium (Mg), sodium (Na), barium (Ba), and copper (Cu) and at least one of sulfur (S) and phosphorus (P), and a total contained amount thereof exceeds 500 ppm; the amorphous hard carbon film comprises carbon (C) as a major component, hydrogen (H) in a range from 5 atomic % or more to 25 atomic % or less, oxygen (O) in an amount less than 0.1 atomic %, and boron (B) in a range from 4 atomic % or more to 30 atomic % or less assuming that a total atomic % of the amorphous carbon film is 100 atomic %; at least one of S a coefficient of friction of the low friction sliding member is 0.06 or less.