Complex nonlinear deformation of nanometer intergranular glassy films in beta-Si3N4.
The mechanical properties of a model of Y-doped intergranular glassy film in silicon nitride ceramics are studied by large-scale ab initio modeling. By linking directly to its electronic structure, it is shown that this microstructure has a complex nonlinear deformation under stress and Y doping significantly enhances the mechanical properties. The calculation of the electrostatic potential across the film supports the space charge model in ceramic microstructures.
Chen
Jun
J
Department of Physics, University of Missouri-Kansas City, Kansas City, Missouri 64110, USA.
Ouyang
Lizhi
L
Rulis
Paul
P
Misra
Anil
A
Ching
W Y
WY