Site Preferences of Hyperfine Impurities in Ni2Al3 Phases |
| |
Authors: | Zacate Matthew O Collins Gary S |
| |
Institution: | (1) Department of Physics, Washington State University, Pullman, WA 99164, USA |
| |
Abstract: | The site occupation of indium solutes in Ni2Al3-type compounds was determined using perturbed angular correlation of gamma rays. Measurements were made for compositions
on both sides of the stoichiometric composition. Sites were identified through their quadrupole interactions. For transition-metal
(TM) rich aluminides and galliumides, indium solutes occupy only one of two inequivalent trivalent-metal sites (Al or Ga).
For TM-poor aluminides, indium solutes tend to locate at noncrystallographic sites such as in grain boundaries. For TM-poor
galliumides, the solutes occupy nickel sites while close to the stoichiometric composition they also occupy sites on an empty
Ni-sublattice. Composition dependences of site preference for indium solutes in Pt2Al3 and Ni2Ga3 are examined in terms of a recently developed thermodynamic model.
This revised version was published online in September 2006 with corrections to the Cover Date. |
| |
Keywords: | solute site preferences lattice location site switching |
本文献已被 SpringerLink 等数据库收录! |