First comprehensive structural study of the E21 carbide phase in Fe-Ga(Al) alloys
Balagurov A.M. Sohatsky A.S. Sumnikov S.V. Yerzhanov B. Chang H.W. Golovin I.S.
April 2026Springer
Journal of Materials Science
2026#61Issue 149681 - 9693 pp.
Abstract: It is shown that in the presence of carbon in Fe74Ga26 and Fe74(Ga,Al)26 alloys, perovskite-like structure of the E21 type (also known as κ-carbide) can form. The results were obtained in high-resolution neutron diffraction experiments on bulk samples and confirmed by measurements of X-ray and electron diffraction patterns. The main structural phase in the studied alloys is mesoscopic clusters D03 randomly embedded in a B2 matrix. Regions with the E21 phase are observed both along the grain boundaries and in the volume of D03. For the first time, the quantitative structural and crystallographic characteristics of the κ-carbide phase in Fe-Ga based alloys were precisely determined and the presence of E21-I and E21-II phases with slightly different compositions was proved. Their linear dependence on the gallium content was demonstrated. As Fe3(Ga,Al) alloys exhibit also an enhanced magnetostriction, the presence of the E21 phase should be considered in future, which has not been done so far.
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Joint Institute for Nuclear Research, Moscow reg., Joliot-Curie str., 6, Dubna, 141980, Russian Federation
National University of Science and Technology ‘‘MISIS’’, Moscow, Russian Federation
Lomonosov Moscow State University, Moscow, Russian Federation
Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan, Almaty, Kazakhstan
Department of Physics, National Chung Cheng University, Chia-Yi, Taiwan
Joint Institute for Nuclear Research
National University of Science and Technology ‘‘MISIS’’
Lomonosov Moscow State University
Institute of Nuclear Physics
Department of Physics
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Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026