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Elastic moduli and hardness of cubic silicon nitride

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

Kurzbeschreibung (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.

Typ des Eintrags: Artikel
Erschienen: 2002
Autor(en): Zerr, Andreas ; Kempf, Markus ; Schwarz, Marcus ; Kroke, Edwin ; Göken, Mathias ; Riedel, Ralf
Titel: Elastic moduli and hardness of cubic silicon nitride
Sprache: Englisch
Kurzbeschreibung (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.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of the American Ceramic Society
Band: 85
(Heft-)Nummer: 1
Verlag: Wiley
Freie Schlagworte: elastic constants,hardness, silicon nitride, nitrides
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Disperse Feststoffe, Dispersive Solids
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 19 Nov 2008 16:29
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