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Thermal Conductivity Measurement of Ion-irradiated Materials
Abstract
Thermal conductivity of ion-irradiated materials is known to be dependent on depth in a complicated manner as the irradiation damage is limited to a thin layer. Previous measurements only extracted the thermal conductivity of the damaged layer close to the surface on such samples. In this manuscript, we applied a multilayered model to describe the continuously changed thermal conductivity with respect to depth, and inversely solve the heat conduction problem to extract thermal conductivity and diffusivity of each layer to obtain a piecewise function of the thermal property profile. Two simulation cases, separately representing metals and ceramics, are studied with different layer division approaches. The multi-layered model is found to be capable of correctly extracting thermal diffusivity from measurements with acceptable errors of ~10%. This is dependent on the layer division, measurement sensitivity, and experimental noise level. The experimental guidelines are summarized with the analysis and discussion of the simulation results.
DOI
10.12783/tc33-te21/30351
10.12783/tc33-te21/30351
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