Ultra-rapid microwave materials synthesis in-situ; an investigation of the mechanism of formation of ternary transition metal carbides
This proposal concerns the in-situ investigation of the mechanism of formation of ternary transition metal carbides. This experiment uses the novel microwave reactor developed for D20 to follow microwave synthesis reactions in-situ. The applicants seek three days of beamtime to study the systems Nb(1-x)Mo(x)C, Ta(1-x)Mo(x)C and Mo(1-x)W(x)C. The samples will be prepared in-situ using novel microwave techniques, which offer a time- and energy-efficient alternative to conventional solid state synthesis. In-situ PND will enable us to identify all of the intermediate phases which arise during synthesis, including any metastable phases that would not be observed in an ex-situ measurement, and quantitatively analyse the evolution of these phases as the reactions progress. In addition, PND of the ternary carbide products will allow us to correlate metal and carbon stoichiometry with properties of the TM carbides, including superconductivity and catalytic activity.
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GREGORY Duncan; DRYSDALE Tim; FURNARI Giandomenico; Thomas C. Hansen; KENNEDY Jennifer and SAREMI YARAHMADI Sina. (2014). Ultra-rapid microwave materials synthesis in-situ; an investigation of the mechanism of formation of ternary transition metal carbides. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-25-228