| Abstract Scope |
Compositionally complex carbonitrides have emerged as effective ultrahigh temperature ceramics for structural and functional applications due to their exceptionally high thermal stability, chemical stability and low thermal conductivity. However, phase segregation and incomplete solid-solution formation are often encountered as a challenge during their synthesis. To mitigate this issue, a single-source precursor containing hafnium, titanium, niobium, tungsten and vanadium molecular precursor was synthesised using the Schlenk line technique. The prepared samples were warm-pressed, followed by pyrolysis in a graphite furnace in the temperature range of 1400-1700 ºC at a rate of 2.5 ºC/min. Structural and phase analysis revealed formation of multi-principal carbonitride phase(s) with nanoscale compositional uniformity. The ceramics pyrolyzed at 1700 ºC demonstrated ~8%, ~7%, and ~3.55 higher relative density than the ceramics pyrolysed at 1400, 1500, and 1600 ºC, respectively. Future studies will focus on the investigation of thermal stability and high temperature behaviours of this compositionally complex carbonitrides. |