Ab-initio Study of the Properties of Advanced Metal Nitrides

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dc.contributor.author Orisakwe, Esther Nkiruka
dc.date.accessioned 2011-10-12T06:31:17Z
dc.date.available 2011-10-12T06:31:17Z
dc.date.issued 2011-10-12
dc.identifier.uri http://hdl.handle.net/10539/10539
dc.description MSc., Faculty of Science, University of the Witwatersrand, 2011 en_US
dc.description.abstract Materials are modeled by the ab-initio plane wave pseudopotential methods using density functional theory. In this work, we are seeking new ultrahard with enhanced elastic and mechanical properties, thermal stability as well as hardness which might be of advantage over known traditional materials (diamond and cubic boron nitride). Structural, elastic and electronic properties of the advanced metal nitrides M2N3 and their ternary phases were investigated using both the local density approximation (LDA) and the generalized gradient approximation (GGA). The relative stability of the ternary phases with respect to their constituent mixtures is computed. Results obtained are compared with the available experimental and theoretical data. To gain more information concerning the elastic properties of these hypothetical materials, we also computed the charge densities of the binary and ternary phases. From these calculations suggestions are made as to how the elastic properties vary from those of known hard materials. en_US
dc.language.iso en en_US
dc.subject metal en_US
dc.subject nitrides en_US
dc.title Ab-initio Study of the Properties of Advanced Metal Nitrides en_US
dc.type Thesis en_US

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