A roughening method of a base material, a surface treatment method of a base material, a method of producing a thermal spray coating material and a thermal spray coating material

摘要

A laser having a power density of 1.0 × 10 ⁷ to 10 ⁹ W / cm ² and a working time of 1.0 × 10 ^-7 to 10 ^-5 s at the irradiation position was irradiated to the ceramic base material 2 The surface of the ceramic substrate 2 is roughened and an oxide film 3 is formed on the roughened surface 2a. Thereby, high adhesion with the thermal sprayed coating formed on the ceramic base material 2 is obtained by the action of the chemical affinity as well as the physical adhesion force by the roughened surface 2a without causing a large decrease of the base strength.