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The mono-carbides of the 3d, 4d and 5d transition metals of groups IVA (Ti, Zr, Hf) and VA (V, Nb, Ta) of the periodic table have the rock salt (B1) structure. They are-found in many technologically important systems. The binary compounds exist over a range of compositions, normally with a deficit of carbon. Since their structures are identical and their lattice parameters similar, there is considerable mutual solubility between then so that a wide range of compounds of the form MC x exist where M is a mixture of transition metals. This paper presents a comparison of the electron energy loss near edge structure (ELNES) on the carbon K-edges from the binary carbides with compositions close to stoichiometry. The spectra show systematic changes of the ELNES and the threshold energy as the metal species is changed. The threshold energy and intensity increase on going from group IVA to group VA. Equivalent features can be identified in the spectrum from each compound. The energy of each feature, relative to the threshold energy, varies systematically with the lattice parameter of the compound. The systematic change in the ELNES with composition has potential applications where mixed metal carbides, nitrides and carbo-nitrides co-exist. In such cases, it can be difficult to obtain an unambiguous interpretation of microanalytical data and ELNES offers one more channel of information

Electron Energy Loss Near Edge Structure (ELNES) on the Carbon K-Edge in Transition Metal Carbides with the Rock Salt Structure