Symposium: Neutron and X-Ray Studies of Advanced Materials V

Metallurgical and Materials Transactions A

, Volume 44, Issue 1, pp 39-44

Interference Effects in Nanocrystalline Systems

  • A. LeonardiAffiliated withDepartment of Civil, Environmental and Mechanical Engineering, University of Trento
  • , M. LeoniAffiliated withDepartment of Civil, Environmental and Mechanical Engineering, University of Trento
  • , P. ScardiAffiliated withDepartment of Civil, Environmental and Mechanical Engineering, University of Trento Email author 

Abstract

Interference (cross-correlation) effects are present in the X-ray powder diffraction pattern of a polycrystalline aggregate. In an experimental diffraction pattern, the information is highly overlapped and can be confused with other effects. In this article, it is shown that the analysis of the patterns calculated from a cluster equilibrated via molecular dynamics simulation allows those effects to be separated. Extra intensity is observed, because of the presence of the grain boundaries contribution which is unexpectedly not that of an amorphous phase.