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Effect of Heat Treatment Temperature on the Crystallization Behavior and Microstructural Evolution of Amorphous NbCo(1.1)Sn

[Image: see text] Heat treatment-induced nanocrystallization of amorphous precursors is a promising method for nanostructuring half-Heusler compounds as it holds significant potential in the fabrication of intricate and customizable nanostructured materials. To fully exploit these advantages, a comp...

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Autores principales: Jung, Chanwon, Zhang, Siyuan, Jang, Kyuseon, Cheng, Ningyan, Scheu, Christina, Yi, Seong-Hoon, Choi, Pyuck-Pa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10561143/
https://www.ncbi.nlm.nih.gov/pubmed/37738356
http://dx.doi.org/10.1021/acsami.3c10298
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author Jung, Chanwon
Zhang, Siyuan
Jang, Kyuseon
Cheng, Ningyan
Scheu, Christina
Yi, Seong-Hoon
Choi, Pyuck-Pa
author_facet Jung, Chanwon
Zhang, Siyuan
Jang, Kyuseon
Cheng, Ningyan
Scheu, Christina
Yi, Seong-Hoon
Choi, Pyuck-Pa
author_sort Jung, Chanwon
collection PubMed
description [Image: see text] Heat treatment-induced nanocrystallization of amorphous precursors is a promising method for nanostructuring half-Heusler compounds as it holds significant potential in the fabrication of intricate and customizable nanostructured materials. To fully exploit these advantages, a comprehensive understanding of the crystallization behavior of amorphous precursors under different crystallization conditions is crucial. In this study, we investigated the crystallization behavior of the amorphous NbCo(1.1)Sn alloy at elevated temperatures (783 and 893 K) using transmission electron microscopy and atom probe tomography. As a result, heat treatment at 893 K resulted in a significantly finer grain structure than heat treatment at 783 K owing to the higher nucleation rate at 893 K. At both temperatures, the predominant phase was a half-Heusler phase, whereas the Heusler phase, associated with Co diffusion, was exclusively observed at the specimen annealed at 893 K. The Debye–Callaway model supports that the lower lattice thermal conductivity of NbCo(1.1)Sn annealed at 893 K is primarily attributed to the formation of Heusler nanoprecipitates rather than a finer grain size. The experimental findings of this study provide valuable insights into the nanocrystallization of amorphous alloys for enhancing thermoelectric properties.
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spelling pubmed-105611432023-10-10 Effect of Heat Treatment Temperature on the Crystallization Behavior and Microstructural Evolution of Amorphous NbCo(1.1)Sn Jung, Chanwon Zhang, Siyuan Jang, Kyuseon Cheng, Ningyan Scheu, Christina Yi, Seong-Hoon Choi, Pyuck-Pa ACS Appl Mater Interfaces [Image: see text] Heat treatment-induced nanocrystallization of amorphous precursors is a promising method for nanostructuring half-Heusler compounds as it holds significant potential in the fabrication of intricate and customizable nanostructured materials. To fully exploit these advantages, a comprehensive understanding of the crystallization behavior of amorphous precursors under different crystallization conditions is crucial. In this study, we investigated the crystallization behavior of the amorphous NbCo(1.1)Sn alloy at elevated temperatures (783 and 893 K) using transmission electron microscopy and atom probe tomography. As a result, heat treatment at 893 K resulted in a significantly finer grain structure than heat treatment at 783 K owing to the higher nucleation rate at 893 K. At both temperatures, the predominant phase was a half-Heusler phase, whereas the Heusler phase, associated with Co diffusion, was exclusively observed at the specimen annealed at 893 K. The Debye–Callaway model supports that the lower lattice thermal conductivity of NbCo(1.1)Sn annealed at 893 K is primarily attributed to the formation of Heusler nanoprecipitates rather than a finer grain size. The experimental findings of this study provide valuable insights into the nanocrystallization of amorphous alloys for enhancing thermoelectric properties. American Chemical Society 2023-09-22 /pmc/articles/PMC10561143/ /pubmed/37738356 http://dx.doi.org/10.1021/acsami.3c10298 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Jung, Chanwon
Zhang, Siyuan
Jang, Kyuseon
Cheng, Ningyan
Scheu, Christina
Yi, Seong-Hoon
Choi, Pyuck-Pa
Effect of Heat Treatment Temperature on the Crystallization Behavior and Microstructural Evolution of Amorphous NbCo(1.1)Sn
title Effect of Heat Treatment Temperature on the Crystallization Behavior and Microstructural Evolution of Amorphous NbCo(1.1)Sn
title_full Effect of Heat Treatment Temperature on the Crystallization Behavior and Microstructural Evolution of Amorphous NbCo(1.1)Sn
title_fullStr Effect of Heat Treatment Temperature on the Crystallization Behavior and Microstructural Evolution of Amorphous NbCo(1.1)Sn
title_full_unstemmed Effect of Heat Treatment Temperature on the Crystallization Behavior and Microstructural Evolution of Amorphous NbCo(1.1)Sn
title_short Effect of Heat Treatment Temperature on the Crystallization Behavior and Microstructural Evolution of Amorphous NbCo(1.1)Sn
title_sort effect of heat treatment temperature on the crystallization behavior and microstructural evolution of amorphous nbco(1.1)sn
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10561143/
https://www.ncbi.nlm.nih.gov/pubmed/37738356
http://dx.doi.org/10.1021/acsami.3c10298
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