METHOD FOR APPLICATION AND LASER TREATMENT OF THERMAL-PROTECTIVE COATING (VERSIONS) Russian patent published in 2017 - IPC C23C4/10 C23C30/00 B23K26/342 B23K26/144 

FIELD: technological processes.

SUBSTANCE: invention relates to gas thermal spraying coating, in particular, to methods of sputtering of heat-resistant and heat-protective coatings. Main metal thermal resistant underlayer is applied. Upper ceramic heat-shielding layer is applied, followed by laser treatment. Laser treatment is performed using a laser beam with U-like energy distribution across cross-section. Output power value and speed of scanning of laser beam is set in range of 100–6,000 W and 0.01–1 m/s. In another version, main metal thermal resistant underlayer is applied. Upper ceramic heat-shielding layer is applied, followed by laser treatment. Laser treatment is performed using a laser beam with U-like energy distribution across cross-section. Output power values and laser beam scanning rate are set in range of 100–6,000 W and 0.01–1 m/s. Laser treatment is then carried out with parameters of laser beam, corresponding to previous laser treatment to obtain a coating with given properties.

EFFECT: high resistance of heat shielding coating to high temperature effects (thermal resistance and heat resistance), erosion and corrosion by fusion of upper ceramic layer.

10 cl, 1 tbl, 1 ex