首页|Manufacture and performance of diamond-coated thermocouples
Manufacture and performance of diamond-coated thermocouples
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NSTL
Diamond-coated thermocouples were prepared with the aim of measuring the temperature at the interface between a grinding wheel and workpiece material. Thermocouples with K-type, R-type and G-type alloy combinations were prepared. Continuousdiamond films were grown on each type of thermocouple using hot filament chemical vapour deposition techniques. The resulting diamond films were characterized using Raman spectroscopy and scanning electron microscopy. Diamond deposition was found to beparticularly successful, in terms of quality and adhesion, with the G-type thermocouple. Diamond-coated C-type thermocouples, with varying diamond thickness, were then prepared and characterized with respect to their thermoelectric voltage response. Suchmeasurements were performed under static conditions, where the thermocouple joint had been allowed to reach a thermal equilibrium with its environment, and under dynamic conditions, where a pulse of heat was applied to the thermocouple at variousintensities and frequencies.
NSTL
