DataVXphysica status solidi (RRL) – Rapid Research LettersPaper
journal article·2010-12

Elastic moduli of hard c‐Zr3N4 from laser ultrasonic measurements

Andreas Zerr, Nikolay Chigarev, Renald Brenner, Dmytro A. Dzivenko, Vitalyi Gusev

physica status solidi (RRL) – Rapid Research Letters· Volume 4· Issue 12
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Abstract

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)
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OpenAlex topics: Advanced ceramic materials synthesis · Metal and Thin Film Mechanics · Advanced materials and composites

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