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Sintering, structure, and mechanical properties of nanophase SiC: A molecular-dynamics and neutron scattering study

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9 Author(s)
Chatterjee, Alok ; Concurrent Computing Laboratory for Materials Simulations (CCLMS), Department of Physics and Astronomy and Department of Computer Science, Louisiana State University, Baton Rouge, Louisiana 70803-4001 ; Kalia, Rajiv K. ; Nakano, Aiichiro ; Omeltchenko, Andrey
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Structure, mechanical properties, and sintering of nanostructured SiC (n-SiC) are investigated with neutron scattering and molecular-dynamics (MD) techniques. Both MD and the experiment indicate the onset of sintering around 1500 K. During sintering, the pores shrink while maintaining their morphology: the fractal dimension is ∼2 and the surface roughness exponent is ∼0.45. Structural analyses reveal that interfacial regions in n-SiC are disordered with nearly the same number of three- and fourfold coordinated Si atoms. The elastic moduli scale with the density as ∼ρμ, where μ=3.4±0.1. © 2000 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:77 ,  Issue: 8 )

Date of Publication:

Aug 2000

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