Accession Number : AD1011341


Title :   A Filtering Method to Reveal Crystalline Patterns from Atom Probe Microscopy Desorption Maps


Descriptive Note : Journal Article


Corporate Author : University of Michigan, Ann Arbor Ann Arbor United States


Personal Author(s) : Yao,Lan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1011341.pdf


Report Date : 26 Mar 2016


Pagination or Media Count : 6


Abstract : A filtering method to reveal the crystallographic information present in Atom Probe Microscopy (APM) data is presented. The method filters atoms based on the time difference between their evaporation and the evaporation of the previous atom. Since this time difference correlates with the location and the local structure of the evaporating atoms on the surface, it can be used to reveal any crystallographic information contained within APM data. The demonstration of this method is illustrated on: A pure Al specimen for which crystallographic poles are clearly visible on the desorption patterns easily indexed. Three Fe-15at. Cr datasets where crystallographic patterns are less obvious and require this filtering method.


Descriptors :   microscopy , crystallography , filtration , desorption , laser pulses , materials science , crystals , evaporation , Atomic properties , atoms , grain boundaries


Distribution Statement : APPROVED FOR PUBLIC RELEASE