Ultra-high temperature resistance of one-dimensional hafnium carbide wrapped with pyrolytic carbon up to 2450 °C

Hafnium carbide (HfC) have attracted growing interests from research of ultra-high temperature ceramics (UHTCs) field. In this paper, we investigated the synthesis and high temperature stability of one-dimensional (1D) HfC and the core-shell HfC nanwoires/pyrolytic carbon (HfCNWs/PyC). Results exhibited that HfC(NWs )with diameter of 200-300 nm could keep their morphological and structural stability at 2100 degrees C, and PyC improved the stability of HfCNWs under high temperature conditions. Our work could not only provide theoretical basis for HfCNWs reinforced carbon or ceramic-based composites, but also propose a deep thinking of the stability of nanomaterials under ultra-high temperature conditions.

Automated summary

The research found that HfC nanowires with a diameter of 200-300 nm could maintain their morphological and structural stability at 2100 degrees Celsius, and the pyrolytic carbon improved their stability under high temperature conditions. This work not only provides a theoretical basis for HfC nanowires reinforced carbon or ceramic-based composites, but also raises deep considerations on the stability of nanomaterials under ultra-high temperature conditions.