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B 4 C and B 4 C–W 2 B 5 composite ceramics are prepared via hot pressing. The composition and microstructure of the ceramics are characterized by means of X-ray diffraction (XRD), electron probe microanalysis (EPMA) and transmission electron microscope (TEM). Their electrical conductivity and Seebeck coefficient are measured from room temperature up to 1500 K. These...
Non-stoichiometric compounds of (Nb y Ti 1-y )C x , in which the amount of Nb element added is increased from zero to 40% (weight percent), synthesized with self-propagating high temperature synthesis, are studied with SCF-X α-DV, a quantum chemistry calculating method. The chemical bonding is studied to discuss the relation between structures and properties. Several...
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