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

Thermal conductivity reduction in (Zr_0.25Ta_0.25Nb_0.25Ti_0.25)C high entropy carbide from extrinsic lattice defects

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

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

High 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, (Zr (Formula presented.) Ta (Formula presented.) Nb (Formula presented.) Ti (Formula presented.))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.

Original language	English
Pages (from-to)	611-617
Number of pages	7
Journal	Materials Research Letters
Volume	10
Issue number	9
DOIs	https://doi.org/10.1080/21663831.2022.2078678
State	E-pub ahead of print - May 25 2022

Keywords

High entropy ceramic
defects
thermal transport

INL Publication Number

INL/JOU-21-65288
105244

Access to Document

10.1080/21663831.2022.2078678

Cite this

@article{126ff135d509478697f51ddd10e14b3c,

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

abstract = "High 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, (Zr (Formula presented.) Ta (Formula presented.) Nb (Formula presented.) Ti (Formula presented.))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.",

keywords = "High entropy ceramic, defects, thermal transport",

author = "Dennett, \{Cody A.\} and Zilong Hua and Eric Lang and Fei Wang and Bai Cui",

note = "Funding Information: This work was supported through the INL Laboratory Directed Research \& Development Program under U.S. Department of Energy Idaho Operations Office Contract DE-AC07-05ID14517. C.A.D. and Z.H. acknowledge support from the Center for Thermal Energy Transport under Irradiation (TETI), an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences. This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the DOE Office of Science. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology \& Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc., for the U.S. DOE's National Nuclear Security Administration under contact DE-NA-0003525. The authors would like to thank S.G. Rosenberg and M. Meyerman at SNL for performing XPS measurements. The views expressed in this article do not necessarily represent the views of the U.S. DOE of the United States Government. Publisher Copyright: {\textcopyright} 2022 The Author(s). Published by Informa UK Limited, trading as Taylor \& Francis Group.",

year = "2022",

month = may,

day = "25",

doi = "10.1080/21663831.2022.2078678",

language = "English",

volume = "10",

pages = "611--617",

journal = "Materials Research Letters",

issn = "2166-3831",

publisher = "Taylor and Francis Ltd.",

number = "9",

}

TY - JOUR

T1 - Thermal conductivity reduction in (Zr0.25Ta0.25Nb0.25Ti0.25)C high entropy carbide from extrinsic lattice defects

AU - Dennett, Cody A.

AU - Hua, Zilong

AU - Lang, Eric

AU - Wang, Fei

AU - Cui, Bai

N1 - Funding Information: This work was supported through the INL Laboratory Directed Research & Development Program under U.S. Department of Energy Idaho Operations Office Contract DE-AC07-05ID14517. C.A.D. and Z.H. acknowledge support from the Center for Thermal Energy Transport under Irradiation (TETI), an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences. This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the DOE Office of Science. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc., for the U.S. DOE's National Nuclear Security Administration under contact DE-NA-0003525. The authors would like to thank S.G. Rosenberg and M. Meyerman at SNL for performing XPS measurements. The views expressed in this article do not necessarily represent the views of the U.S. DOE of the United States Government. Publisher Copyright: © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

PY - 2022/5/25

Y1 - 2022/5/25

N2 - High 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, (Zr (Formula presented.) Ta (Formula presented.) Nb (Formula presented.) Ti (Formula presented.))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.

AB - High 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, (Zr (Formula presented.) Ta (Formula presented.) Nb (Formula presented.) Ti (Formula presented.))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.

KW - High entropy ceramic

KW - defects

KW - thermal transport

UR - https://www.scopus.com/pages/publications/85131153996

U2 - 10.1080/21663831.2022.2078678

DO - 10.1080/21663831.2022.2078678

M3 - Article

AN - SCOPUS:85131153996

SN - 2166-3831

VL - 10

SP - 611

EP - 617

JO - Materials Research Letters

JF - Materials Research Letters

IS - 9

ER -