Metal-carbide eutectics with multiprincipal elements make superrefractory alloys

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

36 Scopus Citations
View graph of relations

Author(s)

  • Qinqin Wei
  • Xiandong Xu
  • Qiang Shen
  • Guoqiang Luo
  • Jian Zhang
  • Jia Li
  • Qihong Fang
  • Mingwei Chen
  • Jianghua Chen

Detail(s)

Original languageEnglish
Article numbereabo2068
Journal / PublicationScience Advances
Volume8
Issue number27
Online published8 Jul 2022
Publication statusPublished - 8 Jul 2022

Link(s)

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.

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.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Download Statistics

No data available