Journal article
Nonstoichiometry in line compounds
Journal of materials science, Vol.42(6), pp.1915-1919
03/2007
Handle:
https://hdl.handle.net/2376/108961
Abstract
Phases having compositional fields narrower than about 1 at.% and appearing as lines in binary phase diagrams often are assumed to have properties independent of composition. That such an assumption can be seriously in error is illustrated by recent measurements on pairs of samples prepared to have compositions at opposing phase boundaries. Two microscopic properties, lattice locations of highly dilute solutes and diffusional jump frequencies, were studied, respectively, through measurement of static and dynamic nuclear quadrupole interactions using the method of perturbed angular correlation of gamma rays (PAC). At opposing boundary compositions, PAC probe atoms have been observed to occupy different lattice sites or to have jump frequencies differing by a factor of 100. Such gross differences suggest measurements of other properties of line compounds should be made on pairs of samples having the opposing boundary compositions in order to avoid inconsistent or unreproducible results.
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Details
- Title
- Nonstoichiometry in line compounds
- Creators
- Gary Collins - Department of Physics and Astronomy Washington State University Pullman WA 99164-2814 USA
- Publication Details
- Journal of materials science, Vol.42(6), pp.1915-1919
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- Kluwer Academic Publishers-Plenum Publishers; New York
- Identifiers
- 99900547002301842
- Language
- English
- Resource Type
- Journal article