Solid-Liquid Synergistic Sintering Kinetics and Densification Model of B₄C Ceramics

B₄C ceramics with different raw powder ratios were prepared by solid-liquid synergistic sintering with different sintering parameters. The influence of sintering temperature and sintering time on the linear shrinkage of B₄C ceramic was studied. The effect of raw powder ratio and sintering temperature on the apparent activation energy was investigated. The solid-liquid synergistic sintering kinetics was analyzed, and the solid-liquid synergisticsintering densification model established considering the sintering temperature, sintering time, raw powder ratio, and green density. The accuracy of the model was assessed. The results show that there was a strong positive correlation between the sintering density predicted by the sintering densification model and sintering density measured, and the average absolute relative error was less than 20%. The model could predict the relationship well between sintering density and the sintering temperature, sintering time, raw powder ratios in the process of solid-liquid synergistic sintering of B₄C ceramics.