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J. Jpn Inst. Met. Mater. 71(8) 608.pdf1.35 MBPDFView/Open
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Title: 1423KにおけるRe-Cr-Ni系γ相とσ相の共役組成
Other Titles: Tie-Lined Compositions of the γ and σPhases in a Ternary Re-Cr-Ni System at 1423 K
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 diagrams
diffusion barrier layer
sigma phase
Issue Date: 1-Aug-2007
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: 71
Issue: 8
Start Page: 608
End Page: 614
Publisher DOI: 10.2320/jinstmet.71.608
Abstract: Compositions with tie-lines between the σ, γ, and δ phases in a ternary Re-Cr-Ni system were investigated at 1423 K by heat-treating various ternary Re-Cr-Ni alloys and a binary Re-40 at%Ni alloy in vacuum for times up to 8640 ks. The microstructures of the Re-containing alloys which had been water-quenched after various heating times were observed and their concentration profiles for Re, Cr and Ni were measured using an electron probe micro-analyzer. The Re-Cr-Ni alloys consisted of the γ phase with either the σ or δ phase. It was found that concentration profiles of the γ phase became flat after short heat treatment, but longer times of up to 8640 ks were required to achieve the same effect for the σ and δ phases. As the Cr contents increased (i.e., Re contents decreased) in the γ phase, the solubility limits of Ni in the σ phase tie-lined with the γ phase increased from 19 at%Ni to 24 at%Ni. The δ phase tie-lined with the γ phase(11.8 at%Re, 11.5 at%Cr, and 76.7 at%Ni) has 71.1 at%Re, 3.2 at%Cr, and 25.7 at%Ni. The Ni contents in the δ phase in a binary Re-Ni system are 30 and 35 at%Ni at 1573 and 1773 K, respectively. It was concluded that compositions of the γ phase tie-lined with the σ and δ phases coincided with those in the calculated and experimentally determined phase diagrams, respectively.
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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