期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 345, 期 1-2, 页码 144-147出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-8388(02)00326-2
关键词
alloys; crystal structure; phase diagram; X-ray diffraction; calorimetry
The phase diagram of the Ca-Ge system has been investigated across the 0-70 at.% Ge range using differential thermal analysis, metallographic analysis, X-ray diffraction and electron microscopy. Four intermediate phases have been confirmed: Ca2Ge (anti PbCl2-type), Ca5Ge3 (Cr5B3-type), CaGe (CrB-type) and CaGe2 (CaSi2-type). Ca7Ge6, not previously known, is a new representative of the Ca7Sn6-type orthorhombic structure. Four eutectics occur in this system: at about 3 at.% Ge and 780 degreesC, 47 at.% Ge and 1155 degreesC, 66 at.% Ge and 840 degreesC, 76 at.% Ge and 745 degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.
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