Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Thermal Characteristic Simulation and Property Evaluation of High Melting Point Materials by Pulsed Current Activated Sintering Process

PCAS공정에 의한 고융점 소결체 열전달 해석 및 특성분석

  • Nam, Hyo-Eun (School of Mechanical System Engineering, Chonnam National University) ;
  • Jang, Jun-Ho (Korea Institute of Industrial Technology (KITECH)) ;
  • Park, Hyun-Kuk (Korea Institute of Industrial Technology (KITECH)) ;
  • Oh, Ik-Hyun (Korea Institute of Industrial Technology (KITECH))
  • 남효은 (전남대학교 기계공학부) ;
  • 장준호 (한국생산기술연구원 서남지역본부) ;
  • 박현국 (한국생산기술연구원 서남지역본부) ;
  • 오익현 (한국생산기술연구원 서남지역본부)
  • Received : 2017.05.22
  • Accepted : 2017.05.27
  • Published : 2017.05.31
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Abstract

In this study, the effects of internal heat treatment associated sintering temperatures were simulated by the Finite Element Method (FEM). The sintering mechanism of pulsed current activated sintering process (PCAS) is still unclear because of some unexplainable heat transfer phenomena in coupled multi-physical fields, as well as the difficulty in measuring the interior temperatures of metal powder. We have carried out simulation study to find out thermal distributions between graphite mold and Ruthenium powder prior to PCAS process. For PCAS process, heating rate was maintained at $100^{\circ}C/min$ the simulation indicates that the sintering temperature range was between $1000^{\circ}C$ to $1300^{\circ}C$ under 60 MPa. The heat transfer inside the Ruthenium sintered-body sample was modelled through the whole process in order to predict the minimum interior temperature. Thermal simulation shows that the interior temperature gradient decreased by graphite punch length and calculation results well agreed with the PCAS field test results.

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References

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