HTHP Home · Issue Contents · Forthcoming Papers

Thermal diffusivity of TZM in the temperature range from 23 °C to 2200 °C
Bruno Hay, Olivier Beaumont, Marc Grelard, Nolwenn Fleurence and Jacques Hameury

Thermal diffusivity of TZM alloy (titanium-zirconium-molybdenum) has been measured by the French National Metrology Institute LNE from room temperature to 2200 °C. The accuracy and reliability of the obtained results have been insured by using a reference laser flash apparatus developed within the European joint research project “Hi-TRACE”. Four series of measurements were carried by testing two specimen thicknesses (2 mm and 3 mm) during two successive heating runs. The results established a stability of the tested material, as well as the independence of thermal diffusivity values obtained to the specimen thickness. A polynomial expression of the thermal diffusivity as a function of temperature has been determined from all obtained data with an associated relative expanded uncertainty (coverage factor k = 2) estimated to be between 3 % and 5 % over the whole temperature range.

Keywords: Thermal diffusivity, high temperature, TZM alloy, laser flash method, metrology