Abstract
The spectral-directional emittance of thermally oxidized stainless steel is measured for angles from normal to grazing, wavelengths between 2 and 10μm, and temperatures between 773 and 973 K. The oxide is grown by holding the steel substrate at a high temperature over a long period while exposed to normal atmospheric conditions, until the measured emissive power of the surface achieves an asymptotic level. It is found that the emittance decreases with angle away from the surface normal at the lower end of the measured spectral range and increases with angle at the higher end. The emittance decreases with wavelength, although there is evidence of a peak near 2 pill. The variation with temperature within the measured range is insignificant. Overall higher values for the oxidized steel are measured than those reported in previous work.
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Jones, P.D., Nisipeanu, E. Spectral-directional emittance of thermally oxidized 316 stainless steel. Int J Thermophys 17, 967–978 (1996). https://doi.org/10.1007/BF01439199
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DOI: https://doi.org/10.1007/BF01439199