Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Spark Plasma Sintering of the Ni-graphite Composite Powder Prepared by Electrical Explosion of Wire in Liquid and Its Properties

  • Thuyet-Nguyen, Minh (School of Materials Science and Engineering, Hanoi University of Science and Technology) ;
  • Kim, Jin-Chun (School of Materials Science and Engineering, University of Ulsan)
  • Received : 2020.02.17
  • Accepted : 2020.02.21
  • Published : 2020.02.28
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Abstract

In this work, the electrical explosion of wire in liquid and subsequent spark plasma sintering (SPS) was introduced for the fabrication of Ni-graphite nanocomposites. The fabricated composite exhibited good enhancements in mechanical properties, such as yield strength and hardness, but reduced the ductility in comparison with that of nickel. The as-synthesized Ni-graphite (5 vol.% graphite) nanocomposite exhibited a compressive yield strength of 275 MPa (about 1.6 times of SPS-processed monolithic nickel ~170 MPa) and elongation to failure ~22%. The hardness of Ni-graphite composite had a value of 135.46 HV, which is about 1.3 times higher than that of pure SPS-processed Ni (105.675 HV). In terms of processing, this work demonstrated that this processing route is a novel, simple, and low-cost method for the synthesis of nickel-graphite composites.

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