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Low-temperature synthesis of tantalum carbide by facile one-pot reaction
Affiliation:1. Centre for Advanced Structural Ceramics, Department of Materials, Imperial College London, South Kensington, London SW7 2AZ, UK;2. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK;1. Department of Mechanical & Materials Engineering, Florida International University, Miami, FL, USA;2. Center for the Study of Matter at Extreme Conditions (CeSMEC), Florida International University, Miami, FL, USA;1. CEA, DAM, Valduc, 21100, Is-sur-Tille, France;2. ICB, UMR 6303 CNRS - Université Bourgogne-Franche comté, BP 47870, 21078 Dijon Cedex, France;3. Pôle Matériaux et Structures, Ecole Catholique des Arts et Métiers, 69005, Lyon, France;4. LABOMAP, Arts et Métiers ParisTech, 71250, Cluny, France;1. Université de Bordeaux, CNRS, Laboratoire des Composites ThermoStructuraux, UMR 5801, 33600 Pessac, France;2. Université de Bordeaux, CNRS, PLACAMAT UMS 3626, 33600 Pessac, France
Abstract:Tantalum carbide (TaC) was synthesized by polycondensation and carbothermal reduction reactions from an inorganic hybrid. Tantalum pentachloride (TaCl5) and phenolic resin were used as the sources of tantalum and carbon, respectively. FTIR of as-synthesized dried complexes revealed formation of Ta-O. Pyrolysis of the complexes at 800 °C/1 h under argon resulted in tantalum oxide which after heat treatment at 1000–1200 °C transformed to tantalum carbide. The mean crystallite size of the precursor-derived TaC ceramics was less than 40 nm and Ta and C elements were homogeneously distributed in the ceramic samples. Mechanism for formation of TaC ceramic was analyzed.
Keywords:Tantalum carbide  Sol-gel  Carbothermal reduction  Ceramics
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