| 摘要 |
PROBLEM TO BE SOLVED: To form homogeneous vitreous carbon film with a high amorphousness on the surface of titanium metal and to efficiently form this vitreous coating on the surface of the titanium metal as thin film. SOLUTION: The surface of titanium metal 1 is polished by buffing using, as abrasives, emery paper, alumina and a suspension of chromium oxide to form a mirror face 1a, a dense and firm titanium oxide coating layer 2 on the mirror face 1a, and the surface of the titanium oxide coating 2 is subjected to plasma heat treatment in an atmosphere of 0.1 to 30 Torr×400 to 1100 deg.C contg. gaseous hydrocarbon such as methane, ethane, propane or the like to form vitreous carbon coating 3 on the surface of the titanium metal.
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