Impact of irradiation induced dislocation loops on thermal conductivity in ceramics

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Impact of irradiation induced dislocation loops on thermal conductivity in ceramics. / Khafizov, Marat; Pakarinen, Janne; He, Lingfeng; Hurley, David H.

In: Journal of the american ceramic society, 30.05.2019, p. 7533-7542.

Research output: Contribution to journalArticle

Harvard

Khafizov, M, Pakarinen, J, He, L & Hurley, DH 2019, 'Impact of irradiation induced dislocation loops on thermal conductivity in ceramics', Journal of the american ceramic society, pp. 7533-7542. https://doi.org/10.1111/jace.16616

APA

Khafizov, M., Pakarinen, J., He, L., & Hurley, D. H. (2019). Impact of irradiation induced dislocation loops on thermal conductivity in ceramics. Journal of the american ceramic society, 7533-7542. https://doi.org/10.1111/jace.16616

Vancouver

Khafizov M, Pakarinen J, He L, Hurley DH. Impact of irradiation induced dislocation loops on thermal conductivity in ceramics. Journal of the american ceramic society. 2019 May 30;7533-7542. https://doi.org/10.1111/jace.16616

Author

Khafizov, Marat ; Pakarinen, Janne ; He, Lingfeng ; Hurley, David H. / Impact of irradiation induced dislocation loops on thermal conductivity in ceramics. In: Journal of the american ceramic society. 2019 ; pp. 7533-7542.

Bibtex - Download

@article{f1061eb9afff4163b5f9f5c5467545fb,
title = "Impact of irradiation induced dislocation loops on thermal conductivity in ceramics",
abstract = "Experimental work aimed at understanding the role of dislocation loops in limiting phonon mediated thermal transport in ceramics is presented. Faulted dislocation loops, having diameters of a few nanometers, were introduced by irradiating a polycrystalline cerium dioxide sample with 1.6 MeV protons at 700°C. XRD analysis indicated that irradiated samples retained their crystalline structure and exhibit very little lattice expansion suggesting a low concentration of point defects. Further microstructure characterization using transmission electron microscopy revealed that interstitial type faulted dislocation loops were primarily created as expected for these irradiation conditions. Thermal conductivity of the damaged layer was measured using a modulated thermoreflectance approach. Analysis of the experimental data using the classical Klemens‐Callaway approach reveals that the conductivity reduction is primarily due to dislocation loops, while point defects and voids play only a minor role. These results provide experimental confirmation that faulted loops offer a unique arrangement for displaced atoms that leads to an unusually large reduction of thermal conductivity.",
keywords = "dislocation loops, radiation damage, thermal conductivity",
author = "Marat Khafizov and Janne Pakarinen and Lingfeng He and Hurley, {David H.}",
note = "Score=10",
year = "2019",
month = "5",
day = "30",
doi = "10.1111/jace.16616",
language = "English",
pages = "7533--7542",
journal = "Journal of the american ceramic society",
issn = "0002-7820",
publisher = "Wiley",

}

RIS - Download

TY - JOUR

T1 - Impact of irradiation induced dislocation loops on thermal conductivity in ceramics

AU - Khafizov, Marat

AU - Pakarinen, Janne

AU - He, Lingfeng

AU - Hurley, David H.

N1 - Score=10

PY - 2019/5/30

Y1 - 2019/5/30

N2 - Experimental work aimed at understanding the role of dislocation loops in limiting phonon mediated thermal transport in ceramics is presented. Faulted dislocation loops, having diameters of a few nanometers, were introduced by irradiating a polycrystalline cerium dioxide sample with 1.6 MeV protons at 700°C. XRD analysis indicated that irradiated samples retained their crystalline structure and exhibit very little lattice expansion suggesting a low concentration of point defects. Further microstructure characterization using transmission electron microscopy revealed that interstitial type faulted dislocation loops were primarily created as expected for these irradiation conditions. Thermal conductivity of the damaged layer was measured using a modulated thermoreflectance approach. Analysis of the experimental data using the classical Klemens‐Callaway approach reveals that the conductivity reduction is primarily due to dislocation loops, while point defects and voids play only a minor role. These results provide experimental confirmation that faulted loops offer a unique arrangement for displaced atoms that leads to an unusually large reduction of thermal conductivity.

AB - Experimental work aimed at understanding the role of dislocation loops in limiting phonon mediated thermal transport in ceramics is presented. Faulted dislocation loops, having diameters of a few nanometers, were introduced by irradiating a polycrystalline cerium dioxide sample with 1.6 MeV protons at 700°C. XRD analysis indicated that irradiated samples retained their crystalline structure and exhibit very little lattice expansion suggesting a low concentration of point defects. Further microstructure characterization using transmission electron microscopy revealed that interstitial type faulted dislocation loops were primarily created as expected for these irradiation conditions. Thermal conductivity of the damaged layer was measured using a modulated thermoreflectance approach. Analysis of the experimental data using the classical Klemens‐Callaway approach reveals that the conductivity reduction is primarily due to dislocation loops, while point defects and voids play only a minor role. These results provide experimental confirmation that faulted loops offer a unique arrangement for displaced atoms that leads to an unusually large reduction of thermal conductivity.

KW - dislocation loops

KW - radiation damage

KW - thermal conductivity

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/35691469

U2 - 10.1111/jace.16616

DO - 10.1111/jace.16616

M3 - Article

SP - 7533

EP - 7542

JO - Journal of the american ceramic society

JF - Journal of the american ceramic society

SN - 0002-7820

ER -

ID: 5640901