CERIUM GALLIUM SYSTEM

被引：21
作者：
DAYAN, D [1 ]
PELLEG, J [1 ]
GUISSER, R [1 ]
机构：
[1] BEN GURION UNIV NEGEV,DEPT MAT ENGN,BEER SHEVA 84120,ISRAEL
来源：
JOURNAL OF THE LESS-COMMON METALS | 1979年 / 68卷 / 02期
关键词：
D O I：
10.1016/0022-5088(79)90057-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The cerium-gallium system has been investigated by differential thermal analysis (DTA), metallography, X-ray diffraction and electron microprobe analysis. The following intermediate phases were observed: Ce3Ga2 (decomposes at 850 °C), CeGa (decomposes at 960 °C) and CeGa2 (melting point 1444 °C). Two eutectic reactions occur: Ce-Ce3Ga2 (495 ± 3 °C) and one on the gallium-rich side at about 30 °C. The addition of gallium to cerium affects the δ(b.c.c.) to γ(f.c.c.) transition temperature of cerium, lowering it from 725 °C to 703 °C. The structure of Ce3Ga2 was identified as the tetragonal Zr3Al2 type with the following lattice parameters: a = 8.3 A ̊, c = 7.64 A ̊. © 1979.
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页码：199 / 205
页数：7
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