Séminaire LMGP - 06/06/2017 - Shiqi ZHANG

Abstract

Combining high temperature chlorination with the chemical sensitivity of the A-atom planes of single crystals of some nano-lamellar MAX phases allows us to synthesize highly porous and electrically conducting carbides. Focusing on the case of porous Cr₃C₂, we present the dependence of the layer morphology, structure and formation kinetics on processing parameters such as temperature and time. The determination of the Raman signature of Cr₃C₂ and Cr₇C₃ allows us to follow the creation and elimination of the various phases as a function of processing time. Electrical resistivity and magnetoresistance data versus temperature and magnetic field are also presented and analyzed.