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Elastic moduli of hard c-Zr3N4 from laser ultrasonic measurements

Zerr, Andreas and Chigarev, Nikolay and Brenner, Renald and Dzivenko, Dmytro A. and Gusev, Vitalyi (2010):
Elastic moduli of hard c-Zr3N4 from laser ultrasonic measurements.
In: physica status solidi (RRL) - Rapid Research Letters, Wiley, pp. 353-355, 4, (12), ISSN 18626254, [Online-Edition: http://dx.doi.org/10.1002/pssr.201004345],
[Article]

Abstract

The bulk and shear moduli of dense polycrystalline oxygen-bearing c-Zr3N4 were determined to be B0 = 217(20) GPa and G0 = 163(9) GPa, respectively, using laser ultrasonic technique combined with a numerical analysis of the sample porosity. While the obtained B0 is in excellent agreement with the earlier high-pressure compression measurements, the G0 value is 70% higher than the previous estimate. Since both G0 and hardness of the dense c-Zr3N4 exceed those of γ-Si3N4, c-Zr3N4 vies for the rank of the third hardest material after diamond and cubic BN. Our results also support the suggestion that shear modulus is a robust predictor of hardness. (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Item Type: Article
Erschienen: 2010
Creators: Zerr, Andreas and Chigarev, Nikolay and Brenner, Renald and Dzivenko, Dmytro A. and Gusev, Vitalyi
Title: Elastic moduli of hard c-Zr3N4 from laser ultrasonic measurements
Language: English
Abstract:

The bulk and shear moduli of dense polycrystalline oxygen-bearing c-Zr3N4 were determined to be B0 = 217(20) GPa and G0 = 163(9) GPa, respectively, using laser ultrasonic technique combined with a numerical analysis of the sample porosity. While the obtained B0 is in excellent agreement with the earlier high-pressure compression measurements, the G0 value is 70% higher than the previous estimate. Since both G0 and hardness of the dense c-Zr3N4 exceed those of γ-Si3N4, c-Zr3N4 vies for the rank of the third hardest material after diamond and cubic BN. Our results also support the suggestion that shear modulus is a robust predictor of hardness. (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Journal or Publication Title: physica status solidi (RRL) - Rapid Research Letters
Volume: 4
Number: 12
Publisher: Wiley
Uncontrolled Keywords: bulk modulus, shear modulus, sound velocities, porosity
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: 05 Apr 2012 08:47
Official URL: http://dx.doi.org/10.1002/pssr.201004345
Identification Number: doi:10.1002/pssr.201004345
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