Presentation, Calibration and First Experiments Using a new Thermobalance for Experiments in Sulfur Vapor Atmospheres

摘要

Sulfur is one of the most aggressive agents in high temperature process atmospheres. To study the reaction of up-to-date high temperature materials, such as intermetallics, in sulfur, a new apparatus has been built at the LRRS in Dijon. The partial pressure of sulfur is controlled by the temperature of a sulfur bath and, thus, the reaction is not influenced by the presence of hydrogen, as occurs in standard equipment employing H_2/H_2S mixtures. Helium is used as carrier gas and also protects the measuring unit of the thermobalance. Hence, high resolution thermogravimetric experiments can be carried out. The experimental set-up and some calibration measurements in the temperature range from 800℃ to 1000℃ are presented. Pure manganese has been chosen as reference material because its behaviour in pure sulfur atmospheres is well known.