A. J. Mayer, D. E. Beatty, T. J. Roemer, Ketch Corporation, Albuquerque, NM; A. C. Hall, R. A. Neiser, D. A. Urrea, J. W. Cates, Sandia National Laboratories, Albuquerque, NM; D. A. Hirschfeld, New Mexico Institue of Mining and Technology, Socorro, NM
Two-color pyrometry has become very common in the measurement of thermal spray particle temperature. Two-color pyrometry can be confounded by the presence of vapor peaks in the infrared emission spectrum. Inexpensive, hand-held devices are now available that make it very practical to investigate the spectrum of a material during the spray process. Common materials such as alumina have been found to emit vapor peaks at wavelengths that are commonly used for two-color pyrometry. The presence of vapor emission can lead to erroneous temperature measurement, and some sensors may even exhibit reversed temperature trends under these conditions. This paper details some of the spectral information that has been collected and the filtering techniques that were used to improve the measurement quality.
Two-color pyrometry can be confounded by the presence of vapor peaks in the infrared emission spectrum. Some sensors may even exhibit reversed temperature trends under these conditions. This paper details some of the spectral information that has been collected and the filtering techniques that were used to improve the measurement quality.
