Improved Green Strength and Green Machinability of ZrB 2 –SiC Through Gelcasting Based on a Double Gel Network

ZrB 2 –SiC green ceramics were fabricated by aqueous gelcasting based on single AM ‐ MBAM , single Na‐alginate, and double gel network system. ZrB 2 –SiC ceramics obtained by aqueous gelcasting based on AM ‐ MBAM and Na‐alginate double gel network had a dramatically highest green strength of 98.6 ± 5.1 MP a, which was 103% and 61% higher than that of ZrB 2 –SiC ceramics based on single AM ‐ MBAM system and Na‐alginate system, respectively. A “scratch test” was conducted to evaluate the green machinability of as‐prepared ZrB 2 –SiC ceramics. The ZrB 2 –SiC ceramics based on this double gel network was found to have the best green machinability.