Fragments of Isothermal Sections of the Gd-Ge(Si)-Ga Systems Phase Diagrams at 800 ºC

N. V. Golovataya, V. Ya. Markiv, N. M. Belyavina

Abstract


The Gd-rich alloys of the Gd-Ge(Si)-Ga systems have been studied by the X-ray powder diffraction. The parts of the isothermal sections of these systems (800 0C, up to 33.3 at. % Gd) have been constructed. Four ternary compounds were found to exist here, namely, 1-GdGe1.0-0.7Ga1.0-1.3 (a-ThSi2-type structure), 2-Gd11Ge9Ga1 (Ho11Ga10), 1-GdSi0.9-0.6Ga1.1-1.4 (a-ThSi2) and 2-GdSi0.9-0.6Ga0.1-0.4 (CrB). One of these compounds (2-Gd11Ge9Ga1) is in fact the Ga-stabilized solid solution on the base of the high temperature Gd11Ge10 compound. Extended solid solutions on the base of the most Gd-{Si,Ge,Ga} binary compounds was shown to form in the Gd-Ge(Si)-Ga systems.

Keywords


phase diagrams; Gd-rich alloys

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References


Eremenko V, Batalin V, Buyanov Y, Obushenko I. Constitution diagram of the gadolinium-germanium system. Powder Metall Met Ceram 1980;19(2):104-108. https://doi.org/10.1007/bf00792035

Gokhale A, Abbaschian G. The Gd-Ge (Gadolinium-Germanium) system. Bulletin of Alloy Phase Diagrams 1989;10(2):147-152. https://doi.org/10.1007/bf02881428

Tharp A, Smith G, Johnson Q. Structures of the rare-earth germanides at or near equiatomic proportions. Acta Crystallographica 1966;20(4):583-585. https://doi.org/10.1107/s0365110x66001294

Gladyshevsky EI, Burnashova VV. Izv. AN USSR. Neorg. Mat. 1965;1(1):1508-1512

Sekizawa K. Magnetic and Crystallographic Studies on Rare Earth Germanides. Journal of the Physical Society of Japan 1966;21(6):1137-1142. https://doi.org/10.1143/jpsj.21.1137

Okamoto H. Gd-Si (Gadolinium-Silicon). J. Phase Equilib. Diffus. 2009;30(2):213-214. https://doi.org/10.1007/s11669-009-9477-2

Palenzona A, Clrafici S. The Ga-Gd (Gallium-Gadolinium) system. Bulletin of Alloy Phase Diagrams 1990;11(1):67-72. https://doi.org/10.1007/bf02841585

Olesinski R, Kanani N, Abbaschian G. The Ga−Si (Gallium-Silicon) system. Bulletin of Alloy Phase Diagrams 1985;6(4):362-364. https://doi.org/10.1007/bf02880523

Olesinski R, Abbaschian G. The Ga−Ge (Gallium-Germanium) system. Bulletin of Alloy Phase Diagrams 1985;6(3):258-262. https://doi.org/10.1007/bf02880411

Markiv V, Belyavina N, in: Proceedings of the Second International Scientific Conference of Engineering and Functional Materials, EFM997, Lviv, 14–16 October, 1997, 260.

Pecharsky VK, Akselrud LG. Krystallografiya 1987;32:874

Venturini G, Vernière A. Crystallographic data and magnetic properties of new ThSi2 and GdSi2 derivative compounds in the Gd–Ga–Ge system. Journal of Alloys and Compounds 2000;305(1-2):7-13. https://doi.org/10.1016/s0925-8388(00)00720-9

Tokaychuk YaO. Thesis for a degree of Candidate of Sciences in Chem., 02.00.01- Inorg.Chem., Ivan Franko National University of Lviv, 2004.


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