Integrating sphere method for determining the effective spectral emissivity of superalloys at high temperatures using a single wavelength pyrometer

Sami D. Alaruri; Lisa Bianchini; Andrew Brewington; Terry Jilg; Brad Belcher

doi:10.1117/1.600839

1 September 1996 Integrating sphere method for determining the effective spectral emissivity of superalloys at high temperatures using a single wavelength pyrometer

Sami D. Alaruri, Lisa Bianchini, Andrew Brewington, Terry Jilg, Brad Belcher

Author Affiliations +

Optical Engineering, Vol. 35, Issue 9, (September 1996). https://doi.org/10.1117/1.600839

A method that employs an integrating sphere and a singlewavelength (1.6-µm) pyrometer for measuring the spectral effective emissivities of superalloys in the temperature range (~650 to 1050 °C) is described. The spectral effective emissivities for five superalloys, namely, MARM-247, MARM-509, CMSX-4, Inconel-718, and N-155 were measured. Correcting the pyrometer measurements for the variations in the object emissivity would reduce the uncertainty in the temperature measurements to < ± 1%.

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Sami D. Alaruri, Lisa Bianchini, Andrew Brewington, Terry Jilg, and Brad Belcher "Integrating sphere method for determining the effective spectral emissivity of superalloys at high temperatures using a single wavelength pyrometer," Optical Engineering 35(9), (1 September 1996). https://doi.org/10.1117/1.600839

Published: 1 September 1996

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