Effect of thermal coarsening on the thermal conductivity of nanoporous gold
Source abstract
Abstract
The thermal conductivities of nanoporous gold (NPG) microwires annealed at different temperatures have been measured in the temperature range from 100 to 320 K. Considering the electron-surface scattering, the thermal conductivity is expected to increase with the increase of ligament diameter. However, the thermal conductivity of NPG microwire is found to decrease after thermal coarsening, and has a maximum value at around 250 K for the as-dealloyed sample. We suggest that the defects accumulating at a relatively high temperature and the reduction in defect spacing may cause these temperature behaviors of thermal conductivity. Taking into account the electron scattering on ligament surfaces and defects, a modified theoretical model for the thermal conductivity of nanoporous metal is proposed to agree with our experimental results.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nanoporous metals and alloys · Electrocatalysts for Energy Conversion · Anodic Oxide Films and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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