Laser thermoreflectance temperature measurements of metal coating alloys on a rotating platform

Abstract
Instruments commercially available to monitor the surface temperature of metal parts undergoing advanced alloy deposition processes are extremely limited, and for some processes; unavailable. In turn, a non-intrusive, non-contact instrument employing optical reflectance to measure surface temperatures of parts undergoing such coating conditions is presented. Very good correlation was obtained between the reflectance signal and the surface temperature for steel, varying titanium nitride coat thickness, and rotating sample modeling. All experimental results show that the laser thermoreflectance temperature measurement technique has a strong potential of being used as a real-time on-line temperature monitoring instrument for metal coating processes.