The effects that planar faults have on the powder diffraction peak profiles of a face-centered cubic (f.c.c.) material are studied considering the case of small crystallites. In doing so a new method to calculate the planar probability correlation function of a faulted crystallite is presented which considers the finite extent of the planar sequence. The resulting correlation function is demonstrated to be dependent on the position of a fault in a crystallite through its proximity to a crystallite boundary. The average correlation function found considering equal probability of a fault existing on each plane in a crystallite is compared with that found by solving a system of recursion relations. The broadened subcomponents of the f.c.c. powder profiles are shown to be related to the correlation function through a general Fourier series expression. This expression is then used to simulate peak profiles from the developed model, and then compare them with those predicted by the recursion relation treatment.



Titolo: Faulting in finite face-centered-cubic crystallites
Autori: Beyerlein, Kenneth Roy; R. L., Snyder; Scardi, Paolo
Autori Unitn: 
Beyerlein, Kenneth Roy
Scardi, Paolo
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Titolo del periodico: ACTA CRYSTALLOGRAPHICA. SECTION A, FOUNDATIONS OF CRYSTALLOGRAPHY
Anno di pubblicazione: 2011
Codice identificativo Scopus: 2-s2.0-79954592080
Codice identificativo ISI: WOS:000289521100007
Digital Object Identifier (DOI): 10.1107/S0108767311009482
Handle: http://hdl.handle.net/11572/92895
Appare nelle tipologie:03.1 Articolo su rivista (Journal article)

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