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Preparation method of surface coating layer of metal heat shielding structure
The invention discloses a preparation method of a surface coating layer of a metal heat shielding structure, relates to a preparation method of a surface coating layer, and solves the technical problems of low oxidation resistance and thermal radiation coefficient of a metal heat protection structure. The method comprises the steps of: (1) preparation of SiO2 sol; (2) pretreatment of a high-temperature alloy sheet; (3) preparation of raw powder; (4) preparation of a mixture; and (5) spraying and drying. The surface of the coating layer prepared by the method is smooth and compact, and the internal of the coating layer is in a porous state, so that the thermal shock resistance is greatly improved. A traditional spraying process is adopted, so that the operation is convenient, and the cost is low. A ratio of three mixed slurry is adjusted to coordinate the thermal expansion property of the coating layer so as to match with a metal matrix; a doped high radiation agent can exert a high radiation effect; the radiation coefficient of the coating layer in a preparation state is not smaller than 0.85; and the reliability of the metal heat shielding structure under a high-temperature service environment is improved. The method is used for preparing the surface coating layer of the metal heat shielding structure.
Preparation method of surface coating layer of metal heat shielding structure
The invention discloses a preparation method of a surface coating layer of a metal heat shielding structure, relates to a preparation method of a surface coating layer, and solves the technical problems of low oxidation resistance and thermal radiation coefficient of a metal heat protection structure. The method comprises the steps of: (1) preparation of SiO2 sol; (2) pretreatment of a high-temperature alloy sheet; (3) preparation of raw powder; (4) preparation of a mixture; and (5) spraying and drying. The surface of the coating layer prepared by the method is smooth and compact, and the internal of the coating layer is in a porous state, so that the thermal shock resistance is greatly improved. A traditional spraying process is adopted, so that the operation is convenient, and the cost is low. A ratio of three mixed slurry is adjusted to coordinate the thermal expansion property of the coating layer so as to match with a metal matrix; a doped high radiation agent can exert a high radiation effect; the radiation coefficient of the coating layer in a preparation state is not smaller than 0.85; and the reliability of the metal heat shielding structure under a high-temperature service environment is improved. The method is used for preparing the surface coating layer of the metal heat shielding structure.
Preparation method of surface coating layer of metal heat shielding structure
SHI LIPING (author) / ZHONG YESHENG (author) / LI MINGWEI (author) / HE XIAODONG (author) / ZENG GANG (author) / MA XIAOLIANG (author) / WANG XIANGYU (author) / GAO YAN (author)
2015-08-26
Patent
Electronic Resource
English
HEAT SHIELDING STRUCTURE, AND METHOD OF CONSTRUCTING HEAT SHIELDING STRUCTURE
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