SOLUBILITY LIMITS OF YTTRIUM AND THE LANTHANIDE RARE-EARTH ELEMENTS IN CHROMIUM AND CHROMIUM-IRON ALLOYS

摘要

The solubility limits of yttrium and the lanthanide tart-earth elements in chromium and chromium-iron alloys were investigated at 2300 F. and at room temperature. Bates of pure chromium and chromium alloyed with 10, 25, 50, and 75 w/o iron were prepared with additions of cerium, dysprosium, erbium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, samarium, terbium, thulium, ytterbium, and yttrium.nMost of the elements investigated are estimated to be soluble to the extent of 0.1 w/o or less in the base alloys. Dysprosium, erbium, and holmium exhibit solubility limits estimated to be between 0.1 and 0.3 w/o. In general, the solubilities of these elements decreased slightly from 2300 F to room temperature.