Open AccessPhase equilibria in the Gd–Cr–Ge system at 1070 K
Author(s) -
M. Konyk,
L. Romaka,
Yu. Stadnyk,
V.V. Romaka,
Volodymyr Pashkevych
Publication year - 2021
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.22.2.248-254
Subject(s) - electron microprobe , isothermal process , annealing (glass) , metallography , ternary operation , crystallography , homogeneity (statistics) , phase diagram , materials science , ternary numeral system , analytical chemistry (journal) , chemistry , phase (matter) , microstructure , metallurgy , mathematics , physics , thermodynamics , statistics , organic chemistry , chromatography , computer science , programming language
The isothermal section of the phase diagram of the Gd–Cr–Ge ternary system was constructed at 1070 K over the whole concentration range using X-ray diffractometry, metallography and electron microprobe (EPM) analysis. Three ternary compounds are realized in the Gd–Cr–Ge system at the temperature of annealing: Gd117Cr52Ge112 (Tb117Fe52Ge112 structure type, space group Fm-3m, Pearson symbol cF1124, a = 2.8971(6) nm), GdCr6Ge6 (SmMn6Sn6 structure type, space group P6/mmm, Pearson symbol hP16, a = 0.51797(2), c = 0.82901(4) nm) and GdCr1-хGe2 (CeNiSi2 structure type, space group Cmcm, Pearson symbol oS16, a = 0.41569(1)-0.41593(8), b = 1.60895(6)-1.60738(3), c = 0.40318(1)-0.40305(8) nm). For the GdCr1-xGe2 compound the homogeneity range was determined (x=0.73 – 0,69).