Promotion of topologically close-packed phases in a Ru-containing Ni-based superalloy

被引：14

作者：

Lee, Sangwon ^{[1
]}

Do, Jeonghyeon ^{[2
]}

Jang, Kyuseon ^{[1
]}

Jun, Hosun ^{[1
]}

Park, Yejun ^{[1
]}

Choi, Pyuck-Pa ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, Daejeon 34141, South Korea

[2] Korea Inst Mat Sci KIMS, Dept High Temp Mat, Chang Won 51508, South Korea

来源：

SCRIPTA MATERIALIA | 2023年 / 222卷

基金：

新加坡国家研究基金会;

关键词：

Ni-based superalloy; Topologically -close packed (TCP) phase; Ruthenium (Ru); Atom probe tomography (APT); Phase stability; SINGLE-CRYSTAL SUPERALLOYS; PRECIPITATION; STABILITY; RUTHENIUM;

D O I：

10.1016/j.scriptamat.2022.115041

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report on the effects of Ru addition on the formation of topologically close-packed (TCP) phases in a Ni-based superalloy during high-temperature exposure. The Ru addition reduces the lattice misfit between the gamma and TCP phase, unexpectedly promoting nucleation of the TCP phase. Furthermore, the gamma matrix is destabilized by Ru, while the stability of TCP phase is less affected according to the prediction of an electronic structure map. The results of this work indicate that gamma destabilization is another important factor for the role of Ru in TCP phase formation.

引用

页数：5

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