Abstract
Abstract Elastic diffuse neutron scattering of an Fe-21.9at.% Al single crystal was measured at 878, 966 and 1073K. The separated short-range order scattering revealed the building elements of the B2 structure as the characteristic local atomic arrangement for all states investigated. Effective pair interaction parameters, obtained by the inverse Monte-Carlo method, were found to depend on temperature, thus prohibiting a determination of possible ground state structures from the high-temperature measurements. An additional X-ray study of single-crystalline Fe-18.2at.%Al aged at 598K, gave no indication for B32 as ground state structure.
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