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Effect of Intermetallic Compounds on the Thermal and Mechanical Properties of Al–Cu Composite Materials Fabricated by Spark Plasma Sintering

1
The Industrial Science Technology Research Center, Pukyong National University, 365, Sinseon-ro, Nam-Gu, Busan 48547, Korea
2
Department of R&D, Next Generation Materials Co., Ltd., 365, Sinseon-ro, Nam-Gu, Busan 48547, Korea
3
Department of Hard Magnets Research, The National Institute of Advanced Industrial Science and Technology (AIST), Shimo-Shidami, Moriyama-ku, Nagoya, Aichi 463-8560, Japan
4
Department of Materials System Engineering, Pukyong National University, 365, Sinseon-ro, Nam-Gu, Busan 48547, Korea
5
Department of Composites Research, Korea Institute of Materials Science, Changwon-daero, Seongsan-gu, Changwon-si 51508, Gyeongsangnam-do, Korea
*
Author to whom correspondence should be addressed.
Materials 2019, 12(9), 1546; https://doi.org/10.3390/ma12091546
Received: 9 April 2019 / Revised: 8 May 2019 / Accepted: 9 May 2019 / Published: 10 May 2019
(This article belongs to the Special Issue Thermal Analysis of Materials)
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Abstract

Aluminium–copper composite materials were successfully fabricated using spark plasma sintering with Al and Cu powders as the raw materials. Al–Cu composite powders were fabricated through a ball milling process, and the effect of the Cu content was investigated. Composite materials composed of Al–20Cu, Al–50Cu, and Al–80Cu (vol.%) were sintered by a spark plasma sintering process, which was carried out at 520 °C and 50 MPa for 5 min. The phase analysis of the composite materials by X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) indicated that intermetallic compounds (IC) such as CuAl2 and Cu9Al4 were formed through reactions between Cu and Al during the spark plasma sintering process. The mechanical properties of the composites were analysed using a Vickers hardness tester. The Al–50Cu composite had a hardness of approximately 151 HV, which is higher than that of the other composites. The thermal conductivity of the composite materials was measured by laser flash analysis, and the highest value was obtained for the Al–80Cu composite material. This suggests that the Cu content affects physical properties of the Al–Cu composite material as well as the amount of intermetallic compounds formed in the composite material. View Full-Text
Keywords: aluminium composite; copper composite; spark plasma sintering; thermal properties; powder metallurgy; intermetallic compound aluminium composite; copper composite; spark plasma sintering; thermal properties; powder metallurgy; intermetallic compound
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Kim, K.; Kim, D.; Park, K.; Cho, M.; Cho, S.; Kwon, H. Effect of Intermetallic Compounds on the Thermal and Mechanical Properties of Al–Cu Composite Materials Fabricated by Spark Plasma Sintering. Materials 2019, 12, 1546.

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