Carbide Formation in Refractory Mo(15)Nb(20)Re(15)Ta(30)W(20) Alloy under a Combined High-Pressure and High-Temperature Condition

In this work, the formation of carbide with the concertation of carbon at 0.1 at.% in refractory high-entropy alloy (RHEA) Mo(15)Nb(20)Re(15)Ta(30)W(20) was studied under both ambient and high-pressure high-temperature conditions. The x-ray diffraction of dilute carbon (C)-doped RHEA under ambient p...

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Autores principales: Zhang, Congyan, Bhandari, Uttam, Zeng, Congyuan, Ding, Huan, Guo, Shengmin, Yan, Jinyuan, Yang, Shizhong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517255/
https://www.ncbi.nlm.nih.gov/pubmed/33286490
http://dx.doi.org/10.3390/e22070718
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author Zhang, Congyan
Bhandari, Uttam
Zeng, Congyuan
Ding, Huan
Guo, Shengmin
Yan, Jinyuan
Yang, Shizhong
author_facet Zhang, Congyan
Bhandari, Uttam
Zeng, Congyuan
Ding, Huan
Guo, Shengmin
Yan, Jinyuan
Yang, Shizhong
author_sort Zhang, Congyan
collection PubMed
description In this work, the formation of carbide with the concertation of carbon at 0.1 at.% in refractory high-entropy alloy (RHEA) Mo(15)Nb(20)Re(15)Ta(30)W(20) was studied under both ambient and high-pressure high-temperature conditions. The x-ray diffraction of dilute carbon (C)-doped RHEA under ambient pressure showed that the phases and lattice constant of RHEA were not influenced by the addition of 0.1 at.% C. In contrast, C-doped RHEA showed unexpected phase formation and transformation under combined high-pressure and high-temperature conditions by resistively employing the heated diamond anvil cell (DAC) technique. The new FCC_L1(2) phase appeared at 6 GPa and 809 °C and preserved the ambient temperature and pressure. High-pressure and high-temperature promoted the formation of carbides Ta(3)C and Nb(3)C, which are stable and may further improve the mechanical performance of the dilute C-doped alloy Mo(15)Nb(20)Re(15)Ta(30)W(20).
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spelling pubmed-75172552020-11-09 Carbide Formation in Refractory Mo(15)Nb(20)Re(15)Ta(30)W(20) Alloy under a Combined High-Pressure and High-Temperature Condition Zhang, Congyan Bhandari, Uttam Zeng, Congyuan Ding, Huan Guo, Shengmin Yan, Jinyuan Yang, Shizhong Entropy (Basel) Article In this work, the formation of carbide with the concertation of carbon at 0.1 at.% in refractory high-entropy alloy (RHEA) Mo(15)Nb(20)Re(15)Ta(30)W(20) was studied under both ambient and high-pressure high-temperature conditions. The x-ray diffraction of dilute carbon (C)-doped RHEA under ambient pressure showed that the phases and lattice constant of RHEA were not influenced by the addition of 0.1 at.% C. In contrast, C-doped RHEA showed unexpected phase formation and transformation under combined high-pressure and high-temperature conditions by resistively employing the heated diamond anvil cell (DAC) technique. The new FCC_L1(2) phase appeared at 6 GPa and 809 °C and preserved the ambient temperature and pressure. High-pressure and high-temperature promoted the formation of carbides Ta(3)C and Nb(3)C, which are stable and may further improve the mechanical performance of the dilute C-doped alloy Mo(15)Nb(20)Re(15)Ta(30)W(20). MDPI 2020-06-28 /pmc/articles/PMC7517255/ /pubmed/33286490 http://dx.doi.org/10.3390/e22070718 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Congyan
Bhandari, Uttam
Zeng, Congyuan
Ding, Huan
Guo, Shengmin
Yan, Jinyuan
Yang, Shizhong
Carbide Formation in Refractory Mo(15)Nb(20)Re(15)Ta(30)W(20) Alloy under a Combined High-Pressure and High-Temperature Condition
title Carbide Formation in Refractory Mo(15)Nb(20)Re(15)Ta(30)W(20) Alloy under a Combined High-Pressure and High-Temperature Condition
title_full Carbide Formation in Refractory Mo(15)Nb(20)Re(15)Ta(30)W(20) Alloy under a Combined High-Pressure and High-Temperature Condition
title_fullStr Carbide Formation in Refractory Mo(15)Nb(20)Re(15)Ta(30)W(20) Alloy under a Combined High-Pressure and High-Temperature Condition
title_full_unstemmed Carbide Formation in Refractory Mo(15)Nb(20)Re(15)Ta(30)W(20) Alloy under a Combined High-Pressure and High-Temperature Condition
title_short Carbide Formation in Refractory Mo(15)Nb(20)Re(15)Ta(30)W(20) Alloy under a Combined High-Pressure and High-Temperature Condition
title_sort carbide formation in refractory mo(15)nb(20)re(15)ta(30)w(20) alloy under a combined high-pressure and high-temperature condition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517255/
https://www.ncbi.nlm.nih.gov/pubmed/33286490
http://dx.doi.org/10.3390/e22070718
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