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Phase Equilibria and Crystal Structures of Transition Metal Nitrides

  • Peter Ettmayer
  • Alfred Vendl

Abstract

Binary and ternary phase diagrams of the transition metals of the 4A, 5A and 6A group of the periodic system with nitrogen have been investigated and in parts reevaluated. Nitrogen pressures up to 1000 bar have been used to further the knowledge about nitride phase diagrams. Revised versions of the systems Ta-N and Mo-N are presented. Ternary nitride phases T5T6N (T5=Nb, Ta) (T6=Cr, Mo) are observed in the systems Nb-Cr-N, Ta-Cr-N, Nb-Mo-N and Ta-Mo-N. These phases belong to the filled-up Θ-CuTi-type with five-fold coordinated nitrogen atoms. The phase Mo(Mo, Ta)2N is isotypic with a number of uranium-platinum metal-carbides and belongs to the filled-up MoSi2-type. Ternary nitride formation seems to be much more frequent than in the corresponding carbide systems.

Keywords

Nitrogen Pressure Ternary Phase Diagram Nitride Phase Tantalum Powder Molybdenum Powder 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Peter Ettmayer
    • 1
  • Alfred Vendl
    • 1
  1. 1.Technical University of ViennaViennaAustria

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