Библиографическое описание:Kinetics of intermetallic phase formation in multilayer Al/Pt thin films : научное издание / Evgeny T. Moiseenko [et al.]. - Текст : непосредственный // Journal of Alloys and Compounds. - 2025. - Т. 1047, № . - P. 185110. - This work was supported by the Russian Science Foundation (grant # 25–13–00351). The TEM and ED investigations were conducted in the laboratory of electron microscopy of the Joint Scientific Center of Siberian Federal University. The STA and XRD investigations were conducted in the Institute of Chemistry and Chemical Technology whose infrastructure was supported by the budget project FWES –2021–0013 of the Ministry of Science and Higher Education of the Russian Federation. - ISSN 0925-8388. - ISSN 1873-4669, DOI 10.1016/j.jallcom.2025.185110.
Аннотация:Complex investigations of a solid-state reaction process were carried out in bilayer and multilayer thin films of Al/Pt and (Al/Pt)15 by the methods of simultaneous thermal analysis, transmission electron microscopy, in situ electron diffraction, and X-ray diffraction. The solid-state reaction between the aluminum and platinum layers was found to start with the formation of an amorphous a-Al2Pt phase. The sequence of the phase formation in the solid-state reaction was determined to be the following: Al+Pt→a-Al2Pt→Al3Pt2→Al21Pt8→Al4Pt. Thermokinetic modeling of the solid-state reaction was made in the Al/Pt films under study. The “An” type of reaction (n-dimensional formation of grains followed by crystallite growth) was shown to most accurately correspond to the formation of the a-Al2Pt phase. The formation of the Al3Pt2 phase was revealed to occur in two sequential stages: the first stage corresponds to the “Bna” type of reaction (a chain mechanism of grain formation followed by fast crystallite growth), while the second stage belongs to the “R3” type of reaction (three dimensional diffusion along grain boundaries and/or a reaction on grain boundaries which proceeds according to the type of a contracting sphere). With regard to the Al21Pt8 and Al4Pt phases, their formation process can be best described by a kinetic model which consists of two parallel reactions. The “An” type of reaction corresponds to the formation of the Al21Pt8 phase, with the “Cn-Х” type of reaction (a reaction with autocatalysis with grain formation following the chain mechanism) corresponding to the formation of the Al4Pt phase. Kinetic parameters of the phase formation for a-Al2Pt, Al3Pt2, Al21Pt8 and Al4Pt, were determined, with those for Al21Pt8 and Al4Pt found for the first time.
Издательство:Elsevier Science Publishing Company, Inc.
Источник:Journal of Alloys and Compounds
Выпуск:Т. 1047
Номера страниц:185110
Держатель оригинала документа:Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Siberian Federal University
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