In-situ Synthesis of Cr₃C₂ Nanosheets by Carbon Reduction Route from Cr₂AlC

Abstract

Carbon black and Cr₂AlC were used as raw materials to obtain a large number of Cr₃C₂ nanosheets by means of the molten salt heat treatment at 1 100 °C for 1.5 hours. Results showed that carbon black can promote the decomposition of a large number of Cr₂AlC to form Cr₃C₂ and Cr₇C₃ nanoparticles at 1 100 °C in the absence of molten salt. Under a molten salt environment, carbon black can promote the complete decomposition of Cr₂AlC to form Cr₃C₂ and Cr₇C₃ nanosheets. The thickness of chromium carbide nanosheets is approximately 10–20 nm, and the length is approximately 100–200 nm. The addition of excess carbon black can promote the complete decomposition of Cr₂AlC into a material with Cr₃C₂ as the main phase.

Keywords

nanosheets / Cr₃C₂ / carbon black / molten salt synthesis