Effects of CaO addition on the CuW composite containing micro- and nano-sized tungsten particles synthesized via aluminothermic coupling with silicothermic reduction
Source abstract
Abstract
Abstract CuW composite fabricated by powder metallurgy using ultrafine metal powders as raw materials has the disadvantages such as uneven microstructure and low compactness. A novel method of synthesizing an as-cast CuW composite ingot via an aluminothermic coupling with silicothermic reduction is presented; a low-melting-point CaO–Al 2 O 3 –SiO 2 slag is formed by adding CaO as a slag former, effectively reducing Al 2 O 3 inclusion in the CuW composite. In this study, the effects of CaO addition on the novel synthesis of the CuW composite via the aluminothermic coupling with silicothermic reduction are investigated. The result shows that CaO affects the removal of large particles (≥6 µm) but not the removal of small particles (≤4 µm). With the increase in the ratio of CaO ranging from 0 to 1.0, the inclusions in the CuW composites gradually transform from Al 2 O 3 to calcium aluminates, which are conducive to the separation of the metal and slag. The contents of Si and O in the CuW composites gradually decrease from 9.40 and 14.00% to 6.10 and 3.50%, respectively, while those of Al and Ca gradually increase from 2.54 and 0.02% to 3.83 and 0.26%, respectively.
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Research context
OpenAlex topics: Aluminum Alloys Composites Properties · Advanced materials and composites · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471023 , China
Provincial and Ministerial Co-construction Collaborative Innovation Center of Nonferrous New Materials and Advanced Processing Technology , Luoyang 471023 , China
Henan Key Laboratory of Non-ferrous Materials Science & Processing Technology, Henan University of Science and Technology , Luoyang 471003 , China
Henan Academy of Sciences , Zhengzhou , 450002 , China
Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores, Ministry of Education, Northeastern University , Shenyang , Liaoning, 110819 , China
Henan Zhongyuan Gold Smelter., LLC , Sanmenxia , 472100 , China
Chinalco Luoyang Copper Processing Co., Ltd , Luoyang , 471039 , China
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