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1423KにおけるRe-Cr-Ni系γ相とσ相の共役組成
| 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 | | rhenium-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 |
| URI: | http://hdl.handle.net/2115/76568 |
| 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)
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Submitter: 林 重成
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