Phase diagrams transition metal nitrides

We comment elsewhere on the inadequacy of current bonding theory to account for the complexity of some binary systems in which solid phases appear with unexpected formulae and/or properties-for example, the oxides of caesium and the nitrides of calcium. Certain transition metals, notably Ti, V, Nb, Mo, and W, have a suprisingly complex oxide chemistry, and although it may be difficult to appreciate all the features of their structures from diagrams, these compounds are sufficiently important to justify mention here. 

Holleck, H., Ternary Carbide Systems of Actinoids wifli Transition Metals of Other Groups (in German), in Binary and Ternary Transition Metal Carbide and Nitride Systems , Petzow, G. (Ed.) Gebraeder Bomtraeger Berlin, Stuttgart, 92-111 (1984) (Crys. Structure, Phase Diagram, Phase Relations, Review, 91)... 

Hoi] Holleck, H., Binary and Ternary Carbides and Nitrides of Transition Metals and Their Phase Relationships (in German), Report KfK 3087B, Kemforschungszentrum, Karlsruhe, 181-183 (1981) (Phase Diagram, Review, 41)... 

The papers presented in the conference span the spectrum of activity in the science of alloys. The theoretical presentations ranged in content from fundamental studies of electronic structure, to first-principles calculations of phase diagrams, to the effects of charge transfer, to the temperature dependence of short-range order parameters. They encompassed the study of mechanical properties, the properties of dislocations, of phase evolution, and computer simulations. Experimental studies were presented based on a variety of state of the art experimental techniques, from TEM to synchrotron diffraction. The phenomena studied varied from the precipitation of nitrides in steel, to the wetting of interfaces between two different crystal structures, to the ordering of vacancies in carbides. And the materials whose properties were measured ranged from Transition metals, to the Lanthanides, to the Actinide series of compounds and alloys. 

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