Journal article
Search for Nucleation of Phase Embryos in Binary Alloys by Impurity Atoms
Zeitschrift für Naturforschung. A, A journal of physical sciences, Vol.55(1), pp.129-133
02/01/2000
Handle:
https://hdl.handle.net/2376/121876
Abstract
A search was made to detect the possibility that individual impurity atoms in two-phase, binary alloys nucleate embryonic crystals. The alloy system studied was Ni-Al and the impurities were
ln probe atoms. Local surroundings of the probes characteristic of the crystal phases were detected through quadrupole interactions with
Cd daughter nuclei using the method of perturbed angular correlation of gamma rays. Analysis of site fractions of the probes led to two alternative interpretations that could not be distinguished on the basis of the present measurements: 1.)
ln probes in the two-phase domain between Ni
Al
and NiAl segregate to Ni
Al
with a segregation energy of about 0.10 eV; or 2.)
ln probes nucleate embryonic crystals of Ni
Al
, with the driving force for nucleation being an attraction between In atoms and Ni vacancies that is known to be strong in NiAl.
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Details
- Title
- Search for Nucleation of Phase Embryos in Binary Alloys by Impurity Atoms
- Creators
- Gary S Collins - Washington State UniversityLuke S.-J Peng - Washington State UniversityMatthew O Zacate - Washington State University
- Publication Details
- Zeitschrift für Naturforschung. A, A journal of physical sciences, Vol.55(1), pp.129-133
- Publisher
- Verlag der Zeitschrift für Naturforschung
- Number of pages
- 5
- Identifiers
- 99900647240201842
- Language
- English
- Resource Type
- Journal article