喷雾干燥法制备Cu-Al<sub>2</sub>O<sub>3</sub>复合粉末及其复合材料的组织与性能

doi:10.19976/j.cnki.43-1448/TF.2023003

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Abstract Aluminum nitrate and copper nitrate were used to prepare Cu-Al₂O₃ composite powders by spray drying, roasting, reduction and ball milling. Cu-Al₂O₃ composites were prepared by hot pressing sintering, eventually the further densification of the materials were achieved by hot forging. The microstructure and morphology of the Cu-Al₂O₃ composite powders and bulk materials were studied by X-ray diffraction scanning electron microscopy and transmission electron microscopy, the tensile strength and conductivity of the composite materials were also tested. The results indicate that the Cu-Al₂O₃ composite powders are flake and the distribution of Al₂O₃ is uniform. The sintered composites have a low density of 95.4%, the tensile strength and conductivity are only 306 MPa and 89.4%IACS. After hot forging, the density increases to 99.9%, the tensile strength and conductivity increase to 422 MPa and 94.8%IACS. γ-Al₂O₃ particles are uniformly distributed in the copper matrix: large-sized particles (50?100 nm) exist at grain boundaries and small-sized particles (10?20 nm) precipitates within grain boundaries.

Key words： dispersion reinforced copper composites spray drying method nano-alumina particles hot-pressed sintering hot forging

Received: 10 January 2023 Published: 23 March 2023

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	WU Hao
	GAN Xueping

Cite this article:

WU Hao,GAN Xueping. Fabrication of Cu-Al₂O₃ composite powder by spray drying and its microstructure, properties[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(1): 74-82.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023003 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I1/74

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