Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Changes in Mechanical and Electrical Properties as a Function of Unidirectional Pressure Changes in Preforming While Isostatic Pressing for Graphite Block Fabrication

흑연블록 제조를 위한 등압성형 시 일축가압 예비성형의 압력변화에 따른 기계적 및 전기적 특성 변화

  • Tae-Sub Byun (Kumoh National Institute of Technology, School of Materials Science and Engineering) ;
  • Dong-Pyo Jeon (Kumoh National Institute of Technology, School of Materials Science and Engineering) ;
  • Sang-Hye Lee (Kumoh National Institute of Technology, School of Materials Science and Engineering) ;
  • Sang-Woo Lee (Kumoh National Institute of Technology, School of Materials Science and Engineering) ;
  • Jae-Seung Roh (Kumoh National Institute of Technology, School of Materials Science and Engineering)
  • 변태섭 (금오공과대학교 신소재공학과) ;
  • 전동표 (금오공과대학교 신소재공학과) ;
  • 이상혜 (금오공과대학교 신소재공학과) ;
  • 이상우 (금오공과대학교 신소재공학과) ;
  • 노재승 (금오공과대학교 신소재공학과)
  • Received : 2023.01.31
  • Accepted : 2023.02.20
  • Published : 2023.02.28
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Abstract

In this study, a graphite block is fabricated using artificial graphite processing byproduct and phenolic resin as raw materials. Mechanical and electrical property changes are confirmed due to the preforming method. After fabricating preforms at 50, 100, and 150 MPa, CIP molding at 150 MPa is followed by heat treatment to prepare a graphite block. 150UP-CIP shows a 12.9% reduction in porosity compared with the 150 MPa preform. As the porosity is decreased, the bulk density, flexural strength, and shore hardness are increased by 14.9%, 102.4%, and 13.7%, respectively; and the deviation of density and electrical resistivity are decreased by 51.9% and 34.1%, respectively. Therefore, as the preforming pressure increases, the porosity decreases, and the electrical and mechanical properties improve.

Keywords

Acknowledgement

이 연구는 금오공과대학교 학술연구비로 지원되었음(2020).

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