TY - JOUR
T1 - Effects of intergranular gas bubbles on thermal conductivity
AU - Chockalingam, K.
AU - Millett, Paul C.
AU - Tonks, M. R.
N1 - Funding Information:
The authors thank Dr. S.B. Biner of Idaho National Laboratory for reviewing the manuscript before it’s submission. The authors gratefully acknowledge financial support from the Nuclear Energy Modeling and Simulation (NEAMS) program within the US Department of Energy.
Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/11
Y1 - 2012/11
N2 - Model microstructures obtained from phase-field simulations are used to study the effective heat transfer across bicrystals with stationary grain boundary bubble populations. We find that the grain boundary coverage, irrespective of the intergranular bubble radii, is the most relevant parameter to the thermal resistance, which we use to derive effective Kapitza resistances that are dependent on the grain boundary coverage and Kaptiza resistance of the intact grain boundary. We propose a model to predict thermal conductivity as a function of porosity, grain-size, Kaptiza resistance of the intact grain boundary, and grain boundary bubble coverage.
AB - Model microstructures obtained from phase-field simulations are used to study the effective heat transfer across bicrystals with stationary grain boundary bubble populations. We find that the grain boundary coverage, irrespective of the intergranular bubble radii, is the most relevant parameter to the thermal resistance, which we use to derive effective Kapitza resistances that are dependent on the grain boundary coverage and Kaptiza resistance of the intact grain boundary. We propose a model to predict thermal conductivity as a function of porosity, grain-size, Kaptiza resistance of the intact grain boundary, and grain boundary bubble coverage.
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U2 - 10.1016/j.jnucmat.2012.06.027
DO - 10.1016/j.jnucmat.2012.06.027
M3 - Article
AN - SCOPUS:84864219630
SN - 0022-3115
VL - 430
SP - 166
EP - 170
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -