Purification of yttrium metal by zone refining and field freezing.
J Less-Common Met 1975 Mar; 40(1):65-77
A study has been made of the purification of yttrium metal by zone refining and field freezing. A floating molten zone was used to avoid contamination of the yttrium metal by the container material. The experiments were conducted under high vacuum to take advantage of the vaporization of volatile impurities. Travel rates of 5, 1, and 0.5 Cm/hr were used. Several metallic impurities such as iron and nickel were removed by zone refining. Differences in results between zone refining and field freezing were small, and possible explanations are discussed. Large single crystals of yttrium were produced by the techniques described.
Metals; Metallurgical-processes; Metallurgy
OP; Journal Article
Journal of the Less-Common Metals