USING OF MODELLING FOR MINIMIZATION OF TEMPERATURE DROP IN B4C-SAMPLE DURING HIGH-SPEED SINTERING UNDER PRESSURE

Abstract

Using the finite element method, a simulation of the temperature field in the work cell of the technological unit during high-speed sintering under pressure (HSSP) of the powder boron carbide samples was performed. The dependence of the properties of the powder billet on porosity and temperature is taken into account. A computerized study of the effect of the cell circuit on the temperature drop in the B4C-sample is carried out. According to the results of simulation, the schemes of the working cell of HSSP-unit and the corresponding heating regimes have been selected, during which the temperature reach 2000 ºС within 100– 150 s, and the temperature drop in the preform during the dwell stage is 13–30 degrees. Implementation of the selected schemes of the working cell of HSSP in the technological unit allowed to obtain homogeneity of the microhardness of the material of the sintered product.