Complex Nonlinear Deformation of Nanometer Intergranular Glassy Films inβ−Si3N4 | Zendy

Jun Chen | Zendy; Lizhi Ouyang | Zendy; Paul Rulis | Zendy; Anil Misra | Zendy; W. Y. Ching | Zendy

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Complex Nonlinear Deformation of Nanometer Intergranular Glassy Films inβ−Si3N4

Author(s) -

Jun Chen,

Lizhi Ouyang,

Paul Rulis,

Anil Misra,

W. Y. Ching

Publication year - 2005

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.95.256103

Subject(s) - materials science , ceramic , microstructure , intergranular corrosion , deformation (meteorology) , doping , nanometre , nonlinear system , condensed matter physics , silicon nitride , composite material , physics , optoelectronics , layer (electronics) , quantum mechanics

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.

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