Misorientation dependence of Al2O3 grain boundary thermal resistance

Kaiping Tai; Abigail Lawrence; Martin P. Harmer; Shen J. Dillon

doi:10.1063/1.4788688

Misorientation dependence of Al₂O₃ grain boundary thermal resistance

Kaiping Tai, Abigail Lawrence, Martin P. Harmer, Shen J. Dillon

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

Abstract

The room-temperature thermal resistance of model low-angle (0001) twist bicrystal Al₂O₃ grain boundaries was measured as a function of misorientation angle using the 3ω thermal conductivity testing technique. The work yields interfacial thermal resistances of 0.44 × 10^-8, 1.2 × 10^-8, and 1.54 × 10^-8 Km² W^-1 for the ∼1.3°, ∼8.0°, and ∼13° twist grain boundaries, respectively. The interfacial thermal resistance correlates with the grain boundary energy calculated from the Read-Shockley model. The results indicate significant anisotropy in the Kapitza resistance whose magnitude is dominated by local structural defects at the grain boundary rather than spectral mismatch between grains.

Original language	English (US)
Article number	034101
Journal	Applied Physics Letters
Volume	102
Issue number	3
DOIs	https://doi.org/10.1063/1.4788688
State	Published - Jan 21 2013

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Online availability

10.1063/1.4788688

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Cite this

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title = "Misorientation dependence of Al2O3 grain boundary thermal resistance",

abstract = "The room-temperature thermal resistance of model low-angle (0001) twist bicrystal Al2O3 grain boundaries was measured as a function of misorientation angle using the 3ω thermal conductivity testing technique. The work yields interfacial thermal resistances of 0.44 × 10-8, 1.2 × 10-8, and 1.54 × 10-8 Km2 W-1 for the ∼1.3°, ∼8.0°, and ∼13° twist grain boundaries, respectively. The interfacial thermal resistance correlates with the grain boundary energy calculated from the Read-Shockley model. The results indicate significant anisotropy in the Kapitza resistance whose magnitude is dominated by local structural defects at the grain boundary rather than spectral mismatch between grains.",

author = "Kaiping Tai and Abigail Lawrence and Harmer, {Martin P.} and Dillon, {Shen J.}",

note = "Funding Information: Financial support from the ONR-MURI under the Grant No. N00014-11-1-0678 is gratefully acknowledged. The experiments were carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois.",

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AU - Tai, Kaiping

AU - Lawrence, Abigail

AU - Harmer, Martin P.

AU - Dillon, Shen J.

N1 - Funding Information: Financial support from the ONR-MURI under the Grant No. N00014-11-1-0678 is gratefully acknowledged. The experiments were carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois.

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Y1 - 2013/1/21

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AB - The room-temperature thermal resistance of model low-angle (0001) twist bicrystal Al2O3 grain boundaries was measured as a function of misorientation angle using the 3ω thermal conductivity testing technique. The work yields interfacial thermal resistances of 0.44 × 10-8, 1.2 × 10-8, and 1.54 × 10-8 Km2 W-1 for the ∼1.3°, ∼8.0°, and ∼13° twist grain boundaries, respectively. The interfacial thermal resistance correlates with the grain boundary energy calculated from the Read-Shockley model. The results indicate significant anisotropy in the Kapitza resistance whose magnitude is dominated by local structural defects at the grain boundary rather than spectral mismatch between grains.

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