Research On Alumino Thermy (1st Report)

Research on the phemomena of thermit reaction at high temperatures was made by using charges producing ferro-boron containing 6-15% B

Abstract

The yield microstructure, bardness, true and apparent density, reaction time and the chemical composition of the metallic mass obtained were examined. The larger the amount of B₂O₃ in the charge mixture is, the higher the appropriate temperature giving the maximum yield as metallic mass rises, causing the yield as boron to be large, although the over-heating of the mixture lowers the yield both as metallic mass and as boron. If the amount of B₂O₃ in the charge mixture is constant, the higher the heating temperature is, the faster the reaction occures, and both density and hardness as well as the content of B, Si and Fe in the product increase, while the content of Al in the product and its porosity decrease.