Effect of particle size on initial reaction temperature of Ti and Zr powders

Abstract

Abstract In order to study the effect of particle size on the initial reaction temperature of reactive metal powders, thermogravimetric analysis- differential scanning calorimetry (TG-DSC) experiments and hot plate combustion tests were performed on Zr and Ti powders with an average particle size of 13±2, 25±5, 48±3, 75±5, 150±10 μm. Differential scanning calorimetry (DSC) results show that the initial reaction temperature of the metal powder with smaller particle size is lower. The heat flow rate and reaction rate are negatively correlated to the particle size. The hot plate combustion test shows that the initial reaction temperature of the metal powder increased with the increasing particle size. The heating rate also has a certain influence on the initial reaction temperature of the reactive metal powder. The initial reaction temperature is lower with a faster heating rate, for Ti and Zr particles of this study.