Metal-carbide eutectics with multiprincipal elements make superrefractory alloys
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Article number | eabo2068 |
Journal / Publication | Science Advances |
Volume | 8 |
Issue number | 27 |
Online published | 8 Jul 2022 |
Publication status | Published - 8 Jul 2022 |
Link(s)
DOI | DOI |
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Attachment(s) | Documents
Publisher's Copyright Statement
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85133886183&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(7001d341-cf1f-42a6-9a25-87a00a654c4b).html |
Abstract
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.
Research Area(s)
Citation Format(s)
Metal-carbide eutectics with multiprincipal elements make superrefractory alloys. / Wei, Qinqin; Xu, Xiandong; Shen, Qiang et al.
In: Science Advances, Vol. 8, No. 27, eabo2068, 08.07.2022.
In: Science Advances, Vol. 8, No. 27, eabo2068, 08.07.2022.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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