Premium
Elastic Moduli and Hardness of Cubic Silicon Nitride
Author(s) -
Zerr Andreas,
Kempf Markus,
Schwarz Marcus,
Kroke Edwin,
Göken Mathias,
Riedel Ralf
Publication year - 2002
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2002.tb00044.x
Subject(s) - materials science , nanoindentation , bulk modulus , indentation hardness , vickers hardness test , elastic modulus , shear modulus , composite material , hydrostatic pressure , diamond , silicon nitride , crystallography , silicon , metallurgy , thermodynamics , microstructure , chemistry , physics
The bulk modulus B 0 = 290(5) GPa and its first pressure derivative B ′ 0 = 4.9(6) were obtained for c ‐Si 3 N 4 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 G 0 of c ‐Si 3 N 4 to be 148(16) GPa. The Vickers microhardness H V (0.5) for dense, oxygen‐free c ‐Si 3 N 4 was estimated to be between 30 and 43 GPa. Both the elastic moduli and microhardness of c ‐Si 3 N 4 exceed those of the hexagonal counterparts, α‐ and β‐phases.