Transactions on Electrical and Electronic Materials

  • 제13권1호
  • /
  • Pages.19-22
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  • 2012
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  • 1229-7607(pISSN)
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  • 2092-7592(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Thermal Stability of the R Phase of a Rapidly Solidified Ti-47.3Ni (at%) Alloy

  • Moon, Hyo-Jung (Division of Materials Science and Engineering & ERI, Gyeongsang National University) ;
  • Chun, Su-Jin (Division of Materials Science and Engineering & ERI, Gyeongsang National University) ;
  • Nam, Tae-Hyun (Division of Materials Science and Engineering & ERI, Gyeongsang National University) ;
  • Liu, Yinong (School of Materials Science and Engineering, The University of Western Australia) ;
  • Yang, Hong (School of Materials Science and Engineering, The University of Western Australia) ;
  • Kim, Yeon-Wook (Department of Materials Engineering, Keimyung University)
  • 투고 : 2011.11.17
  • 심사 : 2011.11.26
  • 발행 : 2012.02.25
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초록

Transformation behavior of rapidly solidified Ti-47.3Ni (at%) alloy ribbons and thermal stability of the R phase in the ribbons were investigated by means of differential scanning calorimetry (DSC), X-ray diffraction, and transmission electron microscopy. Rapidly solidified Ti-47.3Ni alloy ribbons showed the two-stage B2-R-B19' martensitic transformation behavior. The B2-R transformation in the ribbons was observed even after annealing at 1,223 K, which was attributed to the fact that a specific orientation relationship between $Ti_2Ni$ and matrix in the ribbons is maintained after annealing at 1,223 K. The DSC peak temperature of the B2-R transformation ($T_R^*$) decreased with raising annealing temperature, which was attributed to the increased volume fraction of $Ti_2Ni$, thus causing an increased Ni content in the matrix.

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