title: Interpretation of atom probe tomography data for the intermetallic TiAl+Nb by means of field evaporation simulation.
abstract: In this paper simulations of the field evaporation process during field ion microscopy (FIM) and atom probe tomography (APT) are presented and compared with experimental data. The Müller-Schottky-model was extended to include the local atomic arrangement on the evaporation process of atoms. This arrangement was described by the sum of the next-neighbor-binding-energies, which differ for an atom of type A, depending on how many A-A, B-B or A-B bonds are present. Thus simulations of APT-data of intermetallic phases become feasible. In this study simulations of L1(0)-TiAl with additions of Nb are compared with experimental data. Certain artifacts, which appear for experimental data are treated as well.
authors.affiliation: Division of Physical Science and Engineering, 4700 King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia. Torben.Boll@kaust.edu.sa
authors.forename: T
authors.initials: T
authors.lastname: Boll
authors.forename: T
authors.initials: T
authors.lastname: Al-Kassab
mesh_terms: D000497:Alloys / Q000737:chemistry; D000535:Aluminum / Q000737:chemistry*; D003198:Computer Simulation; D008853:Microscopy / Q000379:methods*; D008956:Models, Chemical; D009556:Niobium / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014054:Tomography / Q000379:methods*
chemical_list: D000497:Alloys; D009556:Niobium; D000535:Aluminum; D014025:Titanium