Understanding of the high-speed sintering mechanisms and improvement of the technical construction in the pulsed-current-sintering (PCS) processing

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In order to achieve an advanced pulsed-current-sintering (PCS) technique, this work was performed to understand the sintering mechanisms and to clarify the effect of the sintering parameters, such as heating rate, sintering temperature, dwelling time, loading schedule and so on, on PCS processing of MgAl2O4 spinel. It is found that the sintering behavior changes sensitively with the parameters and dense fine-grained ceramics can be fabricated by carefully optimizing the parameters. Loading at high temperatures, for example, can attain high density spinel even at a high heating rate of 100°C/min, and hence, can save the total processing time.