High-pressure synthesis of tantalum nitride having orthorhombic U 2 S 3 structure

Andreas Zerr, Gerhard Miehe, Jinwang Li, Dmytro A. Dzivenko, Vadim K. Bulatov, Heidi Höfer, Nathalie Boifan-Casanova, Michel Fialin, Gerhard Brey, Tomoaki Watanabe, Masahiro Yoshimura

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Among binary compounds, there is a high potential for discovery of novel members (polymorphic phases or compounds) of the nitrides of transition metals group due to a pronounced dependence of the oxidation state of the metals (M) on pressure. The power of high pressure-high temperature (HP-HT) route for synthesis of binary nitrides has already been demonstrated by the discovery of cubic nitrides of the group 4 and 14 elements, of crystalline polymorphs of P 3 N 5 , and by reports on formation of four noble metal nitrides. It is anticipated that such HP products exhibit, in addition to enhanced elastic and mechanical behavior, other functional properties making them interesting for industrial applications. Here, HP-HT synthesis research is extended to nitrides of group 5 elements, resulting in the discovery of a novel hard tantalum nitride, exhibiting U 2 S 3 structure: η-Ta 2 N 3 (Pbnm, a = 8.1911 (17) Å, b = 8.1830(17) Å, c = 2.9823(3) Å). The stoichiometry is supported by two independent means, verifying that η-Ta 2 N 3 is the first thermodynamically stable transition metal nitride with a N:M ratio exceeding 4:3. Due to its high hardness and peculiar texture (needle-like and granular crystallites), η-Ta 2 N 3 may find practical applications as a hard fracture resistant material.

Original languageEnglish
Pages (from-to)2282-2288
Number of pages7
JournalAdvanced Functional Materials
Volume19
Issue number14
DOIs
Publication statusPublished - 2009 Jul 24

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tantalum nitrides
Tantalum
Nitrides
nitrides
metal nitrides
synthesis
transition metals
Transition metals
noble metals
needles
crystallites
stoichiometry
hardness
textures
routes
oxidation
Precious metals
Crystallization
Polymorphism
Crystallites

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Zerr, Andreas ; Miehe, Gerhard ; Li, Jinwang ; Dzivenko, Dmytro A. ; Bulatov, Vadim K. ; Höfer, Heidi ; Boifan-Casanova, Nathalie ; Fialin, Michel ; Brey, Gerhard ; Watanabe, Tomoaki ; Yoshimura, Masahiro. / High-pressure synthesis of tantalum nitride having orthorhombic U 2 S 3 structure In: Advanced Functional Materials. 2009 ; Vol. 19, No. 14. pp. 2282-2288.
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Zerr, A, Miehe, G, Li, J, Dzivenko, DA, Bulatov, VK, Höfer, H, Boifan-Casanova, N, Fialin, M, Brey, G, Watanabe, T & Yoshimura, M 2009, ' High-pressure synthesis of tantalum nitride having orthorhombic U 2 S 3 structure ', Advanced Functional Materials, vol. 19, no. 14, pp. 2282-2288. https://doi.org/10.1002/adfm.200801923

High-pressure synthesis of tantalum nitride having orthorhombic U 2 S 3 structure . / Zerr, Andreas; Miehe, Gerhard; Li, Jinwang; Dzivenko, Dmytro A.; Bulatov, Vadim K.; Höfer, Heidi; Boifan-Casanova, Nathalie; Fialin, Michel; Brey, Gerhard; Watanabe, Tomoaki; Yoshimura, Masahiro.

In: Advanced Functional Materials, Vol. 19, No. 14, 24.07.2009, p. 2282-2288.

Research output: Contribution to journalArticle

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T1 - High-pressure synthesis of tantalum nitride having orthorhombic U 2 S 3 structure

AU - Zerr, Andreas

AU - Miehe, Gerhard

AU - Li, Jinwang

AU - Dzivenko, Dmytro A.

AU - Bulatov, Vadim K.

AU - Höfer, Heidi

AU - Boifan-Casanova, Nathalie

AU - Fialin, Michel

AU - Brey, Gerhard

AU - Watanabe, Tomoaki

AU - Yoshimura, Masahiro

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