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Re-Cr-Ni系における1423Kの等温状態図の実験的決定
| 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 | | tie-line |
| 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 |
| URI: | http://hdl.handle.net/2115/76566 |
| 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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