ISSN:
1573-8973
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. It was established that the europium-nickel system has a complex phase diagram, that there are chemical compounds, and that the solubility of europium in nickel is low. We found two compounds, Eu2Ni17 and EuNi5, Eu2Ni17 has a structure of the Th2Ni17 type with a=8.36 A, c=8.09 A, and c/a=0.968. EuNi5 has a structure of the CaCu5 type with a=4.911 A, c=3.965 A, and c/a=0.808. On the basis of x-ray diffraction analysis of quenched samples of europium-nickel alloys it was established that the solubility of europium in nickel in the solid state at 1100°C is less than 0.78% by weight (0.30 at.%). 2. Europium forms continuous solid solutions with δ-cerium. The addition of europium lowers the temperature of the polymorphous transformation of δ-cerium into γ-cerium. 3. Alloys of europium with holmium are characterized by high mutual solubility in the liquid and solid states. The difference in the crystal lattices of these metals leads to the assumption that intermediate phases exist in this system. 4. The possibility was examined of using calcium as a substitute for europium in preliminary investigations of systems with other elements.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00819832
Permalink