High-pressure phase transformation of silicon nitride

We provide evidence for a high-pressure phase transformation (HPPT) in the ceramic material silicon nitride. This HPPT is inferred by a high-pressure diamond anvil cell, Raman spectroscopy, scanning/transmission electron microscopy, and optical and acoustic microscope inspection. In the case of sili...

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Bibliographic Details
Published in:Applied physics letters 2003-12, Vol.83 (23), p.4740-4742
Main Authors: Patten, John, Fesperman, Ronnie, Kumar, Satya, McSpadden, Sam, Qu, Jun, Lance, Michael, Nemanich, Robert, Huening, Jennifer
Format: Article
Language:English
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Summary:We provide evidence for a high-pressure phase transformation (HPPT) in the ceramic material silicon nitride. This HPPT is inferred by a high-pressure diamond anvil cell, Raman spectroscopy, scanning/transmission electron microscopy, and optical and acoustic microscope inspection. In the case of silicon nitride, the HPPT involves a ductile or metallike behavior that is observed in severe deformation processes, such as nanoindentation and micromachining. This pressure-induced plasticity is believed to be similar to that found in silicon and germanium with its origin in the high-pressure metallic β-Sn phase formation.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1632031