In:
International Journal of Materials Research, Walter de Gruyter GmbH, Vol. 95, No. 10 ( 2022-02-15), p. 880-887
Abstract:
“Order-order” relaxation processes in high-temperature intermetallics occur after an abrupt change of temperature and are controlled by atomic migration in the almost perfect
superstructure. The related experiments were carried out using systems being of technological interest and representing three common types of superstructures: L1 2 (Ni 3 Albased quasi-binaries), L1 0 (FePd, FePt) and B2 (NiAl, FeAl). The corresponding Monte Carlo (MC) simulations of “Order-order” kinetics involving the Glauber dynamics implemented with vacancy mechanism for atomic jumps were performed. The studies indicate a crucial role of antisite-easy-diffusion channels offered by particular superstructures in determining the character of “Order-order” processes and their relationship to steady-state self-diffusion. Specific mechanisms of the relaxations in triple-defect B2-ordered binaries are discussed.
Type of Medium:
Online Resource
ISSN:
2195-8556
,
1862-5282
DOI:
10.1515/ijmr-2004-0165
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2022
detail.hit.zdb_id:
2232675-3
detail.hit.zdb_id:
2128058-7
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