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Title: High-pressure synthesis and compressive behavior of tantalum nitrides

WC- and NaCl-type tantalum mononitrides and hexagonal Ta{sub 5}N{sub 6} were prepared at high pressure and temperature, and their compressive behaviors were examined using in situ high-pressure X-ray diffraction. Comparison of the formula volumes of the tantalum mononitrides indicated that the NaCl type was the densest phase. The Pā€“V data showed that the WC-type structure had the highest bulk modulus value (K{sub 0}ā€‰=ā€‰351(1) GPa). An analysis of the compression properties in terms of the crystallographic characteristics of the structures indicated that a prismatic polyhedral array with face-sharing connectivity was responsible for the incompressible nature of these tantalum nitrides.
Authors:
; ;  [1] ; ;  [2] ;  [3]
  1. National Institute for Materials Science (NIMS), 1-1, Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
  2. Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho 679-5198 (Japan)
  3. Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)
Publication Date:
OSTI Identifier:
22277868
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; COMPRESSION; CUBIC LATTICES; HEXAGONAL LATTICES; IMPACT STRENGTH; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; SYNTHESIS; TANTALUM NITRIDES; TUNGSTEN CARBIDES; X-RAY DIFFRACTION