| Abstract Scope |
The effect of the starting carbon powder source on the microstructure development and phase evolution of (Hf,Nb,Ta,Ti,Zr)B2-(Hf,Nb,Ta,Ti,Zr)C high entropy dual phase ceramics was studied. Two different carbon black powders with different carbon content and significantly different surface areas were used for the boro-carbothermal reduction process. (Hf,Nb,Ta,Ti,Zr)B2-(Hf,Nb,Ta,Ti,Zr)C high entropy dual phase (HEDP) ultra-high temperature ceramics were synthesised via boro-carbothermal reduction route using the two different carbon powders. After synthesis, WC was added systematically (0 wt% to 15 wt %) to synthesized HEDP, and all the ceramic compositions were densified by spark plasma sintering at 2000 °C. The microstructure as well as the solubility of WC was investigated for high entropy dual phase ultra-high temperature ceramics made from the two different carbon sources. |