한국분말재료학회지 (Journal of Powder Materials)

  • 제22권6호
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  • Pages.426-431
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  • 2015
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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방전 플라즈마 소결(Spark Plasma Sintering) 방법에 의해 제조된 Nb-Si-B계 합금의 미세조직 특성

Microstructure Characterization of Nb-Si-B alloys Prepared by Spark Plasma Sintering Process

  • 김상환 (강원대학교 재료금속공학과) ;
  • 김남우 (강원대학교 재료금속공학과) ;
  • 정영근 (부산대학교 하이브리드소재솔루션 국가핵심연구센터) ;
  • 오승탁 (서울과학기술대학교 신소재공학과) ;
  • 김영도 (한양대학교 신소재공학부) ;
  • 이성 (국방과학연구소) ;
  • 석명진 (강원대학교 재료금속공학과)
  • Kim, Sang-Hwan (Department of Materials and Metallurgical Engineering, Kangwon National University) ;
  • Kim, Nam-Woo (Department of Materials and Metallurgical Engineering, Kangwon National University) ;
  • Jeong, Young-Keun (National Core Research Center for Hybrid Materials Solution, Pusan National University) ;
  • Oh, Sung-Tag (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Kim, Young Do (Division of Materials Science and Engineering, Hanyang University) ;
  • Lee, Seong (Agency for Defence Development) ;
  • Suk, Myung Jin (Department of Materials and Metallurgical Engineering, Kangwon National University)
  • 투고 : 2015.11.09
  • 심사 : 2015.12.09
  • 발행 : 2015.12.28
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초록

Microstructural examination of the Nb-Si-B alloys at Nb-rich compositions is performed. The Nb-rich corner of the Nb-Si-B system is favorable in that the constituent phases are Nb (ductile and tough phase with high melting temperature) and $T_2$ phase (very hard intermetallic compound with favorable oxidation resistance) which are good combination for high temperature structural materials. The samples containing compositions near Nb-rich corner of the Nb-Si-B ternary system are prepared by spark plasma sintering (SPS) process using $T_2$ and Nb powders. $T_2$ bulk phase is made in arc furnace by melting the Nb slug and the Si-B powder compact. The $T_2$ bulk phase was subsequently ball-milled to powders. SPS is performed at $1300^{\circ}C$ and $1400^{\circ}C$, depending on the composition, under 30 MPa for 600s, to produce disc-shaped specimen with 15 mm in diameter and 3 mm high. Hardness tests (Rockwell A-scale and micro Vickers) are carried out to estimate the mechanical property.

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