Thermal conductivity reduction in (Zr0.25Ta0.25Nb0.25Ti0.25)C high entropy carbide from extrinsic lattice defects

Cody A. Dennett; Zilong Hua; Eric Lang; Fei Wang; Bai Cui

doi:10.1080/21663831.2022.2078678

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Thermal conductivity reduction in (Zr0.25Ta0.25Nb0.25Ti0.25)C high entropy carbide from extrinsic lattice defects

Original Reports | 更新时间：2026-08-19

- Thermal conductivity reduction in (Zr0.25Ta0.25Nb0.25Ti0.25)C high entropy carbide from extrinsic lattice defects
- Materials Research Letters Vol. 10, Issue 9, Pages: 611-617(2022)
- 作者机构：
  
  1. a Materials Science and Engineering Department Idaho National Laboratory Idaho Falls ID USA
  2. b Department of Nuclear Science and Engineering Massachusetts Institute of Technology Cambridge
  3. a Materials Science and Engineering Department Idaho National Laboratory Idaho Falls
  4. c Center for Integrated Nanotechnologies Sandia National Laboratories Albuquerque
  5. d Department of Mechanical and Materials Engineering University of Nebraska-Lincoln,Lincoln
  6. d Department of Mechanical and Materials Engineering University of Nebraska-Lincoln Lincoln NE USA
  7. e Nebraska Center for Materials and Nanoscience University of Nebraska-Lincoln,Lincoln
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2022.2078678
  CLC：
- Online First：25 May 2022，
  
  Published：2022
- 稿件说明：
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Cody A. Dennett, Zilong Hua, Eric Lang, et al. Thermal conductivity reduction in (Zr0.25Ta0.25Nb0.25Ti0.25)C high entropy carbide from extrinsic lattice defects[J]. Materials Research Letters, 2022, 10(9): 611-617.
DOI：

Cody A. Dennett, Zilong Hua, Eric Lang, et al. Thermal conductivity reduction in (Zr0.25Ta0.25Nb0.25Ti0.25)C high entropy carbide from extrinsic lattice defects[J]. Materials Research Letters, 2022, 10(9): 611-617. DOI： 10.1080/21663831.2022.2078678.

摘要

Abstract

BSTRACTHigh entropy carbides ceramics with randomly-distributed multiple principal cations have shown high temperature stability

low thermal conductivity

and possible radiation tolerance. While chemical disorder has been shown to suppress thermal conductivity in these materials

little investigation has been made on the effects of additional

extrinsically-generated structural defects on thermal transport. Here

(Zr0.25Ta0.25Nb0.25Ti0.25)C is exposed to Zr ions to generate a micron-scale

structural-defect-bearing layer. The reduction in lattice thermal transport is measured using laser thermoreflectance. Conductivity changes from different implantation temperatures suggest dislocation loops contribute little to phonon scattering while nanoscale defects serve as effective scatterers

offering a pathway for thermal engineering.

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