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Examination of Short- and Long-Range Atomic Order Nanocrystalline SiC and Diamond by Powder Diffraction MethodsThe real atomic structure of nanocrystals determines unique, key properties of the materials. Determination of the structure presents a challenge due to inherent limitations of standard powder diffraction techniques when applied to nanocrystals. Alternate methodology of the structural analysis of nanocrystals (several nanometers in size) based on Bragg-like scattering and called the "apparent lattice parameter" (alp) is proposed. Application of the alp methodology to examination of the core-shell model of nanocrystals will be presented. The results of application of the alp method to structural analysis of several nanopowders were complemented by those obtained by determination of the Atomic Pair Distribution Function, PDF. Based on synchrotron and neutron diffraction data measured in a large diffraction vector of up to Q = 25 Angstroms(exp -1), the surface stresses in nanocrystalline diamond and SiC were evaluated.
Document ID
20030062979
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Palosz, B.
(Polish Academy of Sciences Warsaw, Poland)
Grzanka, E.
(Polish Academy of Sciences Warsaw, Poland)
Stelmakh, S.
(Polish Academy of Sciences Warsaw, Poland)
Gierlotka, S.
(Polish Academy of Sciences Warsaw, Poland)
Weber, H.-P.
(European Synchrotron Radiation Facility Grenoble, France)
Proffen, T.
(Los Alamos National Lab. NM, United States)
Palosz, W.
(Universities Space Research Association Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2002
Subject Category
Solid-State Physics
Meeting Information
Meeting: 225th American Chemical Society Meeting
Location: New Orleans, LA
Country: United States
Start Date: March 23, 2003
End Date: March 27, 2003
Sponsors: American Chemical Society
Distribution Limits
Public
Copyright
Other

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