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Comments on “Hardness, elasticity, and fracture toughness of polycrystalline spinel germanium nitride and tin nitride,” by M.P. Shemkunas, W.T. Petuskey, A.V.G. Chizmeshya, K. Leinenweber, and G.H. Wolf [J. Mater. Res. 19, 1392 (2004)]: Reestablishing of elastic moduli for γ-Ge3N4

Published online by Cambridge University Press:  31 January 2011

Andreas Zerr
Andreas Zerr*
Affiliation:
Laboratoire des Propriétés Mécaniques et Thermodynamiques des Matériaux, Centre National de la Recherche Scientifique (LPMTM-CNRS), Université Paris Nord, 93430 Villetaneuse, France
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

It will be shown that in the considered paper, a mistake occurred by handling or editing of experimental data for one of two investigated materials, namely, for cubic germanium nitride having spinel structure (γ-Ge3N4). This mistake led to incorrect values of the shear modulus G0, Young’s modulus E0, and Poisson’s ratio ν0 of this compound. My effort to recover the elastic moduli of γ-Ge3N4 from the available data gave the following results: G0 = 124 GPa, E0 = 326 GPa, and ν0 = 0.32.

Keywords

Elastic propertiesNitride
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 12: Biomimetic and Bio-enabled Materials Science and Engineering , December 2008 , pp. 3273 - 3274
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

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