Numerical Analysis on Temperature Field of Axial Alternating Magnetic Field-Assisted Electric Field-Activated Sintering

Abstract

The numerical simulation and experimental measurement of temperature distribution in electrical field activated sintering of titanium powders were carried out. The simulated and experimental results were in good agreement. It was shown that the sintering temperature gradually decreased from the center of sample to the outer. To improve the performance of sintered material, the sintering temperature gradient had to minimize. A method, electric field-activated sintering coupled with axial alternating magnetic field, was proposed to homogenize sintering temperature field. The simulation of sintering temperature field was also conducted under different magnetic field intensity. It was proved that the maximum radial sintering temperature difference in sample was reduced by about three fourths, owing to the skin effect of induced current caused by alternating magnetic field.

Effect of Pulsed Magnetic Field on Spark Plasma Sintering of Iron-Based Powders

“…10,11) In recent study, L. Guo and his coworkers proposed a new method that an axial alternating magnetic field is coupled with SPSing, and testified by numerical simulation that the homogeneity of sintering temperature field becomes better, due to the skin effect of the induced current from external alternating magnetic field. 12) In their study, however, the experiments and the other roles of magnetic field in sintering were not studied.…”

Magnetic Field Generated during Electric Current-Assisted Sintering: From Health and Safety Issues to Lorentz Force Effects

“…The purpose of this paper is to investigate the effects of self-generated magnetic fields by a current passing across the processed material. This work does not cover externally applied magnetic fields, as such a topic was extensively discussed by Guo et al [2].…”

“…Electric current-assisted sintering (ECAS) techniques began their journey from the beginning of the last century. Compared with conventional sintering techniques, ECAS has the following advantages: low furnace temperature, short processing duration, direct Joule heating on the workpiece, and significantly improved material properties [2,[5][6][7][8]. While magnetic field effects have been well-investigated in the case of welding, they still remain unexplored in sintering.…”