This study is aiming at controlling the microstructure of plasma sprayed Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> composite coatings using freeze granulated powders. As sprayed a...This study is aiming at controlling the microstructure of plasma sprayed Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> composite coatings using freeze granulated powders. As sprayed and sintered Al<sub>2</sub>O<sub>3</sub> + 3wt%TiO<sub>2</sub> powders were air plasma sprayed with industry process parameters and compared with a commercial powder. The resulting coatings were investigated with respect to powder flowability, porosity and microstructure of the granules. The results showed that microstructure and melting fraction in the coatings could be tailored with the freeze granulation process and heat treatment conditions.展开更多
文摘This study is aiming at controlling the microstructure of plasma sprayed Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> composite coatings using freeze granulated powders. As sprayed and sintered Al<sub>2</sub>O<sub>3</sub> + 3wt%TiO<sub>2</sub> powders were air plasma sprayed with industry process parameters and compared with a commercial powder. The resulting coatings were investigated with respect to powder flowability, porosity and microstructure of the granules. The results showed that microstructure and melting fraction in the coatings could be tailored with the freeze granulation process and heat treatment conditions.
