Influence of Eccentric Arrangement of the Die for the Temperature Distribution in the Sample during the Pressure-Assisted Induction Sintering (PAIS)

Abstract

In this work, the pressure-assisted induction sintering (PAIS) method, is being presented. The specimens (a cylindrical shape, diameter of 50 mm, height of 10 mm) was heated by a induction coil with heating speed of about 220 K/s to temperature 800°C, 850oC, 900oC, 950oC and 1000oC. During this process, the temperature of specimen was measured by five thermocouples (Φ 0.5 mm) which were located into graphite punch with sampling frequency of 2 Hz. Firstly, the die with specimen was located in the center of the coil. Next, the die was located out of the coil center (1 and 2 cm in four directions) and heated again. The analyzed samples show a difference of heat flow in the specimens. The studies also showed the difference between the temperature at the surface of the matrix (measured by a pyrometer) and the temperature of the sample (measured by a thermocouples). Two types of thermocouples placement were tested, parallel and perpendicular to the door of the vacuum chamber. In addition, an analysis of the temperature distribution along the diameter of the sample was performed.