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J. Jpn Inst. Met. Mater. 72(2) 132.pdf942.98 kBPDFView/Open
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Title: Re-Cr-Ni系における1423Kの等温状態図の実験的決定
Other Titles: Experimental Determination of Isothermal Phase Diagram at 1423 K in the Ternary Re-Cr-Ni System
Authors: 齋藤, 繁1 Browse this author
黒川, 一哉2 Browse this author
林, 重成3 Browse this author →KAKEN DB
高島, 敏行4 Browse this author
成田, 敏夫5 Browse this author
Authors(alt): Saito, Shigeru1
Kurokawa, Kazuya2
Hayashi, Shigenari3
Takashima, Toshiyuki4
Narita, Toshio5
Keywords: rhenium-chromium-nickel
phase equilibrium diagram
sigma phase
diffusion barrier layer
Issue Date: 1-Feb-2008
Publisher: 日本金属学会
Journal Title: 日本金属学会誌
Journal Title(alt): Journal of the Japan Institute of Metals
Volume: 72
Issue: 2
Start Page: 132
End Page: 137
Publisher DOI: 10.2320/jinstmet.72.132
Abstract: Compositions with tie-lines between the γ, α, σ, and δ phases in a ternary Re-Cr-Ni system were investigated by heat-treating various ternary Re-Cr-Ni alloys in vacuum at 1423 K for a variety of heating times up to 2500 h. The microstructures of the Re-Cr-Ni alloys that had been water-quenched after heating were observed and their Re, Cr and Ni concentration profiles were measured using an electron probe micro-analyzer (EPMA). It was found that a very long heat treatment was required to obtain equilibrium compositions of Ar-arc-melted Re-Cr-Ni alloys. The tie-line compositions (at%) of each phase at 1423 K were experimentally determined, and an isothermal phase diagram was constructed. From these results, the γ, α, and σ phases of the three-phase coexistence state were found to have the following compositions: γ phase (3.0 at%Re, 45.6 at%Cr, and 51.4 at%Ni), α phase (16.1 at%Re, 75.2 at%Cr, and 8.7 at%Ni), and σ phase (16.3 at%Re, 60.3 at%Cr, and 23.4 at%Ni). In addition, the γ, σ, and δ phases have the following compositions: γ phase (13.3 at%Re, 18.1 at%Cr, and 68.6 at%Ni), σ phase (54.6 at%Re, 24.2 at%Cr, and 21.2 at%Ni), and δ phase (70.2 at%Re, 6.0 at%Cr, and 23.8 at%Ni). The solubility limits of Ni in the σ phase increased from 19 at%Ni to 24 at%Ni, as the Cr content in the σ phase with a tie-line with the γ phase increased from 23 at%Cr to 61 at%Cr.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 林 重成

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