| abstract |
It is an object to provide a high-hardness carbon coating excellent in low friction characteristics. The high-hardness carbon coating, formed on a circular substrate, is incorporated with aluminum both in the surface layer and inside at 0.5 to 4.5% by atom, inclusive, and has a Young's modulus of 50 to 180 GPa, inclusive, aluminum oxide and/or aluminum hydroxide inside and thickness of 0.5 to 10 µm, inclusive. |