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Metal-carbide eutectics with multiprincipal elements make superrefractory alloys

Materials with excellent high-temperature strength are now sought for applications in hypersonics, fusion reactors, and aerospace technologies. Conventional alloys and eutectic multiprincipal-element alloys (MPEAs) exhibit insufficient strengths at high temperatures due to low melting points and mic...

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Autores principales: Wei, Qinqin, Xu, Xiandong, Shen, Qiang, Luo, Guoqiang, Zhang, Jian, Li, Jia, Fang, Qihong, Liu, Chain-Tsuan, Chen, Mingwei, Nieh, Tai-Gang, Chen, Jianghua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269878/
https://www.ncbi.nlm.nih.gov/pubmed/35857469
http://dx.doi.org/10.1126/sciadv.abo2068
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author Wei, Qinqin
Xu, Xiandong
Shen, Qiang
Luo, Guoqiang
Zhang, Jian
Li, Jia
Fang, Qihong
Liu, Chain-Tsuan
Chen, Mingwei
Nieh, Tai-Gang
Chen, Jianghua
author_facet Wei, Qinqin
Xu, Xiandong
Shen, Qiang
Luo, Guoqiang
Zhang, Jian
Li, Jia
Fang, Qihong
Liu, Chain-Tsuan
Chen, Mingwei
Nieh, Tai-Gang
Chen, Jianghua
author_sort Wei, Qinqin
collection PubMed
description Materials with excellent high-temperature strength are now sought for applications in hypersonics, fusion reactors, and aerospace technologies. Conventional alloys and eutectic multiprincipal-element alloys (MPEAs) exhibit insufficient strengths at high temperatures due to low melting points and microstructural instabilities. Here, we report a strategy to achieve exceptional high-temperature microstructural stability and strength by introducing eutectic carbide in a refractory MPEA. The synergistic strengthening effects from the multiprincipal-element mixing and strong dislocation blocking at the interwoven metal-carbide interface make the eutectic MPEA not only have outstanding high-temperature strength (>2 GPa at 1473 K) but also alleviate the room-temperature brittleness through microcrack tip blunting by layered metallic phase. This strategy offers a paradigm for the design of the next-generation high-temperature materials to bypass the low–melting point limitation of eutectic alloys and diffusion-dominated softening in conventional superalloys.
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spelling pubmed-92698782022-07-20 Metal-carbide eutectics with multiprincipal elements make superrefractory alloys Wei, Qinqin Xu, Xiandong Shen, Qiang Luo, Guoqiang Zhang, Jian Li, Jia Fang, Qihong Liu, Chain-Tsuan Chen, Mingwei Nieh, Tai-Gang Chen, Jianghua Sci Adv Physical and Materials Sciences Materials with excellent high-temperature strength are now sought for applications in hypersonics, fusion reactors, and aerospace technologies. Conventional alloys and eutectic multiprincipal-element alloys (MPEAs) exhibit insufficient strengths at high temperatures due to low melting points and microstructural instabilities. Here, we report a strategy to achieve exceptional high-temperature microstructural stability and strength by introducing eutectic carbide in a refractory MPEA. The synergistic strengthening effects from the multiprincipal-element mixing and strong dislocation blocking at the interwoven metal-carbide interface make the eutectic MPEA not only have outstanding high-temperature strength (>2 GPa at 1473 K) but also alleviate the room-temperature brittleness through microcrack tip blunting by layered metallic phase. This strategy offers a paradigm for the design of the next-generation high-temperature materials to bypass the low–melting point limitation of eutectic alloys and diffusion-dominated softening in conventional superalloys. American Association for the Advancement of Science 2022-07-08 /pmc/articles/PMC9269878/ /pubmed/35857469 http://dx.doi.org/10.1126/sciadv.abo2068 Text en Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
Wei, Qinqin
Xu, Xiandong
Shen, Qiang
Luo, Guoqiang
Zhang, Jian
Li, Jia
Fang, Qihong
Liu, Chain-Tsuan
Chen, Mingwei
Nieh, Tai-Gang
Chen, Jianghua
Metal-carbide eutectics with multiprincipal elements make superrefractory alloys
title Metal-carbide eutectics with multiprincipal elements make superrefractory alloys
title_full Metal-carbide eutectics with multiprincipal elements make superrefractory alloys
title_fullStr Metal-carbide eutectics with multiprincipal elements make superrefractory alloys
title_full_unstemmed Metal-carbide eutectics with multiprincipal elements make superrefractory alloys
title_short Metal-carbide eutectics with multiprincipal elements make superrefractory alloys
title_sort metal-carbide eutectics with multiprincipal elements make superrefractory alloys
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269878/
https://www.ncbi.nlm.nih.gov/pubmed/35857469
http://dx.doi.org/10.1126/sciadv.abo2068
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