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Synthesis and properties of oxygen-bearing c-Zr3N4 and c-Hf3N4

Dzivenko, D. A. ; Zerr, A. ; Miehe, G. ; Riedel, R. (2009)
Synthesis and properties of oxygen-bearing c-Zr3N4 and c-Hf3N4.
In: Journal of Alloys and Compounds, 480 (1)
doi: 10.1016/j.jallcom.2008.10.011
Article, Bibliographie

Abstract

This paper presents our recent results on synthesis and properties of high-pressure cubic zirconium(IV)- and hafnium(IV) nitrides having Th3P4-type structure, c-M3N4 (M = Zr or Hf). c-M3N4 were first synthesized in microscopic amounts in a laser-heated diamond anvil cell (LH-DAC) at pressures above 15 GPa and temperatures above 2500 K. Further, macroscopic amounts of c-Hf3N4 and of a new oxygen-bearing zirconium nitride, c-Zr2.86(N0.88O0.12)4, were synthesized at 12 GPa and about 1900 K using a multi-anvil apparatus. The lattice parameter of c-Hf3N4 was determined to be a0 = 670.2(1) pm. The a0 of c-Zr2.86(N0.88O0.12)4 of 675.49(1) pm was found to be slightly larger than that of c-Zr3N4 (674.0(6) pm). The bulk moduli, B0, of 219 GPa for c-Zr2.86(N0.88O0.12)4 and of 227 GPa for c-Hf3N4 were obtained from compression measurements. Combining the compression and indentation data we determined for c-Zr2.86(N0.88O0.12)4 its isotropic shear modulus G0 = 96 GPa. Finally, Vickers microhardness, indentation fracture toughness and thermal expansion of c-Zr2.86(N0.88O0.12)4 were measured.

Item Type: Article
Erschienen: 2009
Creators: Dzivenko, D. A. ; Zerr, A. ; Miehe, G. ; Riedel, R.
Type of entry: Bibliographie
Title: Synthesis and properties of oxygen-bearing c-Zr3N4 and c-Hf3N4
Language: English
Date: 1 July 2009
Journal or Publication Title: Journal of Alloys and Compounds
Volume of the journal: 480
Issue Number: 1
DOI: 10.1016/j.jallcom.2008.10.011
Abstract:

This paper presents our recent results on synthesis and properties of high-pressure cubic zirconium(IV)- and hafnium(IV) nitrides having Th3P4-type structure, c-M3N4 (M = Zr or Hf). c-M3N4 were first synthesized in microscopic amounts in a laser-heated diamond anvil cell (LH-DAC) at pressures above 15 GPa and temperatures above 2500 K. Further, macroscopic amounts of c-Hf3N4 and of a new oxygen-bearing zirconium nitride, c-Zr2.86(N0.88O0.12)4, were synthesized at 12 GPa and about 1900 K using a multi-anvil apparatus. The lattice parameter of c-Hf3N4 was determined to be a0 = 670.2(1) pm. The a0 of c-Zr2.86(N0.88O0.12)4 of 675.49(1) pm was found to be slightly larger than that of c-Zr3N4 (674.0(6) pm). The bulk moduli, B0, of 219 GPa for c-Zr2.86(N0.88O0.12)4 and of 227 GPa for c-Hf3N4 were obtained from compression measurements. Combining the compression and indentation data we determined for c-Zr2.86(N0.88O0.12)4 its isotropic shear modulus G0 = 96 GPa. Finally, Vickers microhardness, indentation fracture toughness and thermal expansion of c-Zr2.86(N0.88O0.12)4 were measured.

Uncontrolled Keywords: Nitride materials, Transition metal alloys and compounds, Crystal structure, Mechanical properties, High pressure
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 12 Apr 2012 09:26
Last Modified: 05 Mar 2013 10:00
PPN:
Funders: Financial support of the Deutsche Forschungsgemeinschaft (Bonn, Germany), Financial support of the Fonds der Chemischen Industrie (Frankfurt, Germany), Financial support of the Adolf-Messer-Foundation (Germany), Financial support of DESY (Hamburg, Germany).
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