Effects of copper addition on the in-situ synthesis of SiC particles in Al–Si–C–Cu system |
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| Affiliation: | 1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. The 14th Research Institute, China Electronics Technology Group Corporation, Nanjing 210013, China;1. University Politehnica Bucharest, Splaiul Independentei no. 313, Bucharest Romania;2. INCDMNR-IMNR, B-dul Biruintei no. 102, Pantelimon, Ilfov, Romania;1. Department of Material Science and Engineering, Korea University, Seoul 136-713, Republic of Korea;2. Structural Materials Division, Korea Institute of Materials Science, Changwon 641-010, Republic of Korea;1. Departamento de Engenharia Nuclear – Escola de Engenharia, Universidade Federal de Minas Gerais (UFMG), Avenida Antonio Carlos, 6627, Campus Pampulha, PCA1, CEP. 31270-901 Belo Horizonte, MG, Brazil;2. Instituto Nacional de Ciência e Tecnologia de Reatores Nucleares Inovadores/CNPq, Brazil;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, PR China;2. College of Applied Science, Harbin University of Science and Technology, Harbin, PR China;3. College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, PR China;1. AGH-University of Science and Technology, Faculty of Non-Ferrous Metals, Cracow, Poland;2. AGH-University of Science and Technology, Faculty of Metals Engineering and Industrial Informatics, Cracow, Poland |
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| Abstract: | In this research work, SiC particles have been successfully in-situ synthesized in Al–Si–Cu matrix alloy utilizing a novel liquid–solid reaction method. The effect of copper addition on the synthesis of SiC in Al–Si–C–Cu system was investigated. The composites mainly contain spherical SiC particles and θ-Al2Cu eutectic phases, which are embedded in the α-Al matrix. Results indicated that the temperature for forming in-situ SiC particles significantly reduced from 750 °C to 700 °C with the copper addition. The size of in-situ synthesized SiC particles can be as low as 0.2 μm. Further study found that the addition of 10 wt.% copper into Al–Si–C alloy causes its solidus temperature to decrease by about 65 °C. Additionally, the Rockwell hardness value of SiCp/Al–18Si–5Cu composites has an average of 92, which is 50% higher than that of the sample without copper addition. |
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| Keywords: | SiCp Copper In-situ synthesis Al–Si–C–Cu alloy Microstructure |
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