論文

査読有り
2018年

Quantitative evaluation of microstructure in mo-si-b-tic alloy produced by melting and tilt casting methods

Materials Transactions
  • Sojiro Uemura
  • ,
  • Takateru Yamamuro
  • ,
  • Joung Wook Kim
  • ,
  • Yasuhiro Morizono
  • ,
  • Sadahiro Tsurekawa
  • ,
  • Kyosuke Yoshimi

59
1
開始ページ
136
終了ページ
145
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2320/matertrans.M2017194
出版者・発行元
Japan Institute of Metals (JIM)

Mo-Si-B-TiC alloys are expected to be a candidate for an ultrahigh-temperature material beyond Ni-base superalloys. This work quantitatively investigated the microstructure of a Mo-Si-B-TiC alloy with the composition of Mo-5Si-10B-10TiC (65Mo alloy) (at%) produced via arc-melting and tilt-casting techniques. The alloy was composed of four constituent phases: Mo solid solution (Moss), Mo5SiB2(T2), (Ti, Mo)Cx, (Mo, Ti)2C, and their eutectic (or peritecteutectic) phases. The compositions of the constituent phases were determined by electron beam micro analyzer (EPMA). Scanning electron microscopy - backscattered electron diffraction (SEM-EBSD) measurements revealed that T2 and (Ti, Mo)Cx phases have orientation relationships with Mo phase: {110}Mo//(001)T2, Mo//T2 and {110}Mo//{111}(Ti,Mo)Cx, Mo//001(Ti,Mo)Cx. Furthermore, the three-dimensional SEM observation with the combination of the focused ion beam (FIB) serial sectioning technique demonstrated that the T2 phase had a thin plate shape with the orientation of (001) as plate surfaces and of {100} as side ones.

リンク情報
DOI
https://doi.org/10.2320/matertrans.M2017194
ID情報
  • DOI : 10.2320/matertrans.M2017194
  • ISSN : 1345-9678
  • SCOPUS ID : 85039850598

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