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Elastic moduli and hardness of cubic silicon nitride

Zerr, Andreas and Kempf, Markus and Schwarz, Marcus and Kroke, Edwin and Göken, Mathias and Riedel, Ralf (2002):
Elastic moduli and hardness of cubic silicon nitride.
In: Journal of the American Ceramic Society, Wiley, pp. 86-90, 85, (1), [Article]

Abstract

The bulk modulus B0= 290(5) GPa and its first pressure derivative B′0= 4.9(6) were obtained for c-Si3N4 from volume versus pressure dependence. Measurements were performed under quasi-hydrostatic conditions in a diamond anvil cell to 53 GPa using synchrotron radiation and energy dispersive X-ray powder diffraction. This combined with nanoindentation measurements determined the shear modulus G0 of c-Si3N4 to be 148(16) GPa. The Vickers microhardness HV(0.5) for dense, oxygen-free c-Si3N4 was estimated to be between 30 and 43 GPa. Both the elastic moduli and microhardness of c-Si3N4 exceed those of the hexagonal counterparts, α- and β-phases.

Item Type: Article
Erschienen: 2002
Creators: Zerr, Andreas and Kempf, Markus and Schwarz, Marcus and Kroke, Edwin and Göken, Mathias and Riedel, Ralf
Title: Elastic moduli and hardness of cubic silicon nitride
Language: English
Abstract:

The bulk modulus B0= 290(5) GPa and its first pressure derivative B′0= 4.9(6) were obtained for c-Si3N4 from volume versus pressure dependence. Measurements were performed under quasi-hydrostatic conditions in a diamond anvil cell to 53 GPa using synchrotron radiation and energy dispersive X-ray powder diffraction. This combined with nanoindentation measurements determined the shear modulus G0 of c-Si3N4 to be 148(16) GPa. The Vickers microhardness HV(0.5) for dense, oxygen-free c-Si3N4 was estimated to be between 30 and 43 GPa. Both the elastic moduli and microhardness of c-Si3N4 exceed those of the hexagonal counterparts, α- and β-phases.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 85
Number: 1
Publisher: Wiley
Uncontrolled Keywords: elastic constants,hardness, silicon nitride, nitrides
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: 19 Nov 2008 16:29
License: [undefiniert]
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