Ceramic composite powder for thermal spraying and preparation method of ceramic composite powder: Fid-Bau Portal

Ceramic composite powder for thermal spraying and preparation method of ceramic composite powder

The invention discloses ceramic composite powder for thermal spraying and a preparation method of the ceramic composite powder. The ceramic composite powder comprises a core region and a shell layer,wherein the core region is coated with the shell layer; materials forming the core region are composed of modified CBN and modified TiO2; and the shell layer is made of YAG. The preparation method comprises the following steps: uniformly mixing an aluminum salt solution and a yttrium salt solution to obtain an aluminum-yttrium composite solution; dissolving the modified CBN powder and the modifiedTiO2 powder in deionized water, conducting ultrasonic uniform dispersing, and adjusting a pH value to obtain modified CBN/modified CBN mixed slurry; slowly and dropwise adding the aluminum-yttrium composite solution into the mixed slurry, and carrying out stirring, standing and filtering successively to obtain a composite precipitate; and washing, drying and calcining the composite precipitate toobtain the YAG/modified CBN/modified TiO2 ceramic composite powder. The ceramic composite powder has excellent dispersity, wear resistance and oxidation resistance, and is used in a thermal sprayingprocess.

本发明公开了一种用于热喷涂的陶瓷复合粉体及其制备方法。该陶瓷复合粉体它包括核区和壳层，壳层包覆核区；组成核区的材料为改性CBN与改性TiO2；组成壳层的材料为YAG。其制备方法为：将铝盐溶液与钇盐溶液混合均匀，得到铝钇复合溶液；将改性CBN粉体与改性TiO2粉体溶于去离子水中，超声分散均匀，调节pH，得到改性CBN/改性CBN混合浆体，将上述铝钇复合溶液缓慢滴加至所述混合浆体中，搅拌，静置，过滤，得到复合沉淀物，洗涤，干燥，煅烧，得到YAG/改性CBN/改性TiO2陶瓷复合粉体。该陶瓷复合粉体具有优异的分散性、耐磨性与抗氧化性，用于热喷涂工艺中。

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