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ISSN Print: 2150-3621
Volumes:
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 An Official Journal of the American Society of Thermal and Fluids Engineers International Journal of Energy for a Clean EnvironmentFormerly Known as Clean Air: International Journal on Energy for a Clean Environment
DOI: 10.1615/InterJEnerCleanEnv.2015015257
pages 131-137 IN-PLANE THERMAL DIFFUSIVITY OF ALUMINUM COATED STEEL SUBSTRATES
Boyu Zheng
State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Haidian District, Beijing 100084, P. R. China
Huilong Dong
State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Haidian District, Beijing 100084, P. R. China
Feifan Chen
State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Haidian District, Beijing 100084, P. R. China ABSTRACTThe nanostructured thermal coating has been discovered to be effective in improving the signal-to-noise ratio of thermal measurement, but sometimes influences the thermal properties of the workpiece surface. In this work, the thermal properties of aluminum-based coatings were investigated. Aluminum thin films, ranging from 3 nm to 0.5 µm, deposited on a 304 stainless steel substrate were prepared by vacuum evaporation and a peak diffusing measurement method was applied to characterize the thermal diffusivity of the nanostructured surface. The work presented hereinafter consists of characterizing the effects of aluminum coating on apparent thermal diffusivity. A practical interval of thickness within which the aluminum coating will not obviously influence the substrate thermal diffusivity is given. |