Diffusion-controlled alloying of single-phase multi-principal transition metal carbides with high toughness and low thermal diffusivity

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Chong Peng
  • Xiang Gao
  • Mingzhi Wang
  • Lailei Wu
  • Hu Tang
  • Xiaomin Li
  • Qian Zhang
  • Fuxiang Zhang
  • Yuhui Wang
  • Bing Zhang
  • Bo Gao
  • Qin Zou
  • Yucheng Zhao
  • Qian Yang
  • Dongxia Tian
  • Hong Xiao
  • Huiyang Gou
  • Wenge Yang
  • Xuedong Bai
  • Wendy L. Mao
  • Ho-Kwang Mao

Detail(s)

Original languageEnglish
Article number011905
Journal / PublicationApplied Physics Letters
Volume114
Issue number1
Publication statusPublished - 7 Jan 2019
Externally publishedYes

Abstract

Multicomponent alloying has displayed extraordinary potential for producing exceptional structural and functional materials. However, the synthesis of single-phase, multi-principal covalent compounds remains a challenge. Here, we present a diffusion-controlled alloying strategy for the realization of covalent multi-principal transition metal carbides (MPTMCs) with a single face-centered cubic phase. The increased interfacial diffusion promoted by the addition of a nonstoichiometric compound leads to rapid formation of the single phase at much lower sintering temperature. Direct atomic-level observations via scanning transmission electron microscopy demonstrate that MPTMCs are composed of a single phase with a random distribution of all cations, which holds the key to the unique combinations of improved fracture toughness, superior Vickers hardness, and extremely lower thermal diffusivity achieved in MPTMCs. The present discovery provides a promising approach toward the design and synthesis of next-generation high-performance materials.

Bibliographic Note

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Citation Format(s)

Diffusion-controlled alloying of single-phase multi-principal transition metal carbides with high toughness and low thermal diffusivity. / Peng, Chong; Gao, Xiang; Wang, Mingzhi; Wu, Lailei; Tang, Hu; Li, Xiaomin; Zhang, Qian; Ren, Yang; Zhang, Fuxiang; Wang, Yuhui; Zhang, Bing; Gao, Bo; Zou, Qin; Zhao, Yucheng; Yang, Qian; Tian, Dongxia; Xiao, Hong; Gou, Huiyang; Yang, Wenge; Bai, Xuedong; Mao, Wendy L.; Mao, Ho-Kwang.

In: Applied Physics Letters, Vol. 114, No. 1, 011905, 07.01.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review