Abstract
Calculations based on the regular solution theory of alloys suggest that segregation of the more volatile constituent to the surface of a bulk alloy or small alloy particle, a microcluster alloy, may occur for all alloy systems, regardless of temperature. If the bulk alloy should undergo phase separation, there is no nucleation barrier to this process at a surface and a microcluster should not be undercoolable as a homogeneous single phase material. Homogeneous single phase microclusters with unsegregated surfaces could be observed experimentally only if the annealing time given to the microcrystals is too short to allow diffusion to occur. Similarly, on very highly dispersed materials where almost every atom is on the surface, segregation of one component is expected to sites with low coordination number such as ledges or kinks.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
