Combinatorial study of thermal stability in ternary nanocrystalline alloys
Name
1-s2.0-S1359645420300859-main.pdf
Description
Published version
Size
3.07 MB
Format
Adobe PDF
Checksum (MD5)
2b804a2384846a0d919334f6b9b87811
Author(s)
Kube, Sebastian A.
Xing, Wenting
Kalidindi, Arvind Rama
Sohn, Sungwoo
Datye, Amit
Amram, Dor
Schuh, Christopher A
Schroers, Jan
Date Issued
February 2020
Journal
Acta Materialia
Publisher
Elsevier BV
Citation
Kube, Sebastian A. et al. "Combinatorial study of thermal stability in ternary nanocrystalline alloys." Acta Materialia 188 (February 2020) 40-48 © 2020 Acta Materialia Inc.
Version
Final published version
Abstract
Nanocrystalline alloys can be stabilized through selective grain boundary segregation of specific solute element additions. Increasing attention is being paid to ternary and higher order systems, where complex interactions govern segregation. To efficiently study the large composition spaces of such systems, we apply a high-throughput combinatorial technique revealing nanocrystalline stability through composition-grain-size maps. We compare two systems with distinct binary and ternary alloy interactions: In Pt–AuAg both binaries are expected to be stable, whereas in Pt–AuPd the Pt–Pd binary is unstable and Au-induced co-segregation of Pd was previously reported. For ternary Pt–AuAg we find excellent thermal stability throughout. The Pt–AuPd system, by contrast, divides into an unstable regime, where Pd solute dominates and precipitates, and a stable regime, where Au solute dominates and retains Pd in the grain boundary. Overall, by combining current theory and the introduced combinatorial approach, stable multicomponent nanocrystalline composition spaces can be rapidly determined.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.ACTAMAT.2020.01.059
