Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Production of Dispersion-strengthened Cu-TiB2 Alloys by Ball-milling and Spark-plasma Sintering

  • Kwon, Dae-Hwan (Research Center for Machine Parts and Materials, School of Materials Science & Engineering Processing, University of Ulsan) ;
  • Kum, Jong-Won (Research Center for Machine Parts and Materials, School of Materials Science & Engineering Processing, University of Ulsan) ;
  • Nguyen, Thuy Dang (Research Center for Machine Parts and Materials, School of Materials Science & Engineering Processing, University of Ulsan) ;
  • Dudinad, Dina (Research Center for Machine Parts and Materials, School of Materials Science & Engineering Processing, University of Ulsan) ;
  • Choi, Pyuck-Pa (Research Center for Machine Parts and Materials, School of Materials Science & Engineering Processing, University of Ulsan) ;
  • Kim, Ji-Soon (Research Center for Machine Parts and Materials, School of Materials Science & Engineering Processing, University of Ulsan) ;
  • Kwon, Young-Soon (Research Center for Machine Parts and Materials, School of Materials Science & Engineering Processing, University of Ulsan)
  • Published : 2006.09.24
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Abstract

Dispersion-strengthened copper with $TiB_2$ was produced by ball-milling and spark plasma sintering (SPS).Ball-milling was performed at a rotation speed of 300rpm for 30 and 60min in Ar atmosphere by using a planetary ball mill (AGO-2). Spark-plasma sintering was carried out at $650^{\circ}C$ for 5min under vacuum after mechanical alloying. The hardness of the specimens sintered using powder ball milled for 60min at 300rpm increased from 16.0 to 61.8 HRB than that of specimen using powder mixed with a turbular mixer, while the electrical conductivity varied from 93.40% to 83.34%IACS. In the case of milled powder, hardness increased as milling time increased, while the electrical conductivity decreased. On the other hand, hardness decreased with increasing sintering temperature, but the electrical conductiviey increased slightly

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