Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Micro-EDM Feasibility and Material Properties of Hybrid Ti2AlC Ceramic Bulk Materials

하이브리드 Ti2AlC 세라믹 소결체의 재료특성 및 Micro-EDM 유용성 연구

  • Jeong, Guk-Hyun (Graduate School of Convergence Science, Pusan National University) ;
  • Kim, Kwang-Ho (Graduate School of Convergence Science, Pusan National University) ;
  • Kang, Myung-Chang (Graduate School of Convergence Science, Pusan National University)
  • 정국현 (부산대학교 융합학부(하이브리드소재솔루션 국가핵심연구센터)) ;
  • 김광호 (부산대학교 융합학부(하이브리드소재솔루션 국가핵심연구센터)) ;
  • 강명창 (부산대학교 융합학부(하이브리드소재솔루션 국가핵심연구센터))
  • Received : 2014.08.06
  • Accepted : 2014.08.18
  • Published : 2014.08.28
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Abstract

Titanium alloys are extensively used in high-temperature applications due to their excellent high strength and corrosion resistance properties. However, titanium alloys are problematic because they tend to be extremely difficult-to-cut material. In this paper, the powder synthesis, spark plasma sintering (SPS), bulk material characteristics and machinability test of hybrid $Ti_2AlC$ ceramic bulk materials were systematically examined. The bulk samples mainly consisted of $Ti_2AlC$ materials with density close to theoretical value were synthesized by a SPS method. Random orientation and good crystallization of the $Ti_2AlC$ was observed at $1100^{\circ}C$ for 10 min under SPS sintering conditions. Scanning electron microscopy results indicated a homogeneous distribution and nano-laminated structure of $Ti_2AlC$ MAX phase. The hardness and electrical conductivity of $Ti_2AlC$ were higher than that of Ti 6242 alloy at sintering temperature of $1000^{\circ}C{\sim}1100^{\circ}C$. Consequently, the machinability of the hybrid $Ti_2AlC$ bulk materials is better than that of the Ti 6242 alloy for micro-EDM process of micro-hole shape workpiece.

Keywords

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