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

Dzivenko, D. A. and Zerr, A. and Miehe, G. and Riedel, R. (2009):
Synthesis and properties of oxygen-bearing c-Zr3N4 and c-Hf3N4.
In: Journal of Alloys and Compounds, 480 (1), pp. 46-49, ISSN 09258388,
[Online-Edition: http://dx.doi.org/10.1016/j.jallcom.2008.10.011],
[Article]

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. and Zerr, A. and Miehe, G. and Riedel, R.
Title: Synthesis and properties of oxygen-bearing c-Zr3N4 and c-Hf3N4
Language: English
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.

Journal or Publication Title: Journal of Alloys and Compounds
Volume: 480
Number: 1
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
Official URL: http://dx.doi.org/10.1016/j.jallcom.2008.10.011
Identification Number: doi:10.1016/j.jallcom.2008.10.011
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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