an Entity references as follows:
Tantalum hafnium carbide is a refractory chemical compound with a general formula Tax Hfy-x Cy, which can be considered as a solid solution of tantalum carbide and hafnium carbide. It is also the most refractory metal. Scientists think it can improve properties of rocket engines and or increase the temperature of plasma in fusion reactors. This is why many experts think it can be useful for technical machines in the near future.