▎ 摘　　要

The flash sintering behavior of Al2O3/reduced graphene oxide (rGO) composites was investigated. rGO was used as a composite component and a conductive additive. Under the electric fields of 250-400 V cm(-1), the flash event occurred at extremely low temperatures of 236-249 degrees C. The current density limit played a significant role in the degree of densification. A larger current density resulted in a higher density of the sample. However, current densities larger than 33.33 A cm(-2) resulted in broken samples because of the localization of high current density coupled with the formation of hot spots. Flash sintering at a furnace temperature of 800 degrees C, electric field of 300 V cm(-1) and current density limit of 33.33 A cm(-2) produced nearly completely dense Al2O3/rGO composites. In addition to the current limit, the furnace temperature is also a key parameter that controls the degree of densification to achieve "safe" flash sintering.