PHASE DIAGRAM STUDIES FINAL REPORT, JANUARY 9-DECEMBER 31, 1958
Phase relationships in the binary systems Y-Fe, Y-Ni, and Y-Cu were studied. Yttnium metal and high-purity alloying ingredients were employed. Conventional nonconsumable electrods arc-melting techniques were employed for preparing the ingots; compositions were chosen at appropriate intervals from 0 to 100% of the alloying addition. As-cast and annealed samples were studied metallographically; melting-point and x-ray studies also aided in defining phase relationships. The melting point of yttnium metal was sharply reduced with small additions of either iron, nickel, or copper. Less than 1 wt.% iron, nickel, or copper was soluble in solid yttnium. Conversely, less than 1 wt.% yttrium was soluble in iron-, nickel-, or copper-nich solid solution. Each of the diagrams was characterized by the presence of several intermetallic compounds. In the Y- Fe system, YFe/sub 2/, YFe/sub 3/, YFe/sub 4/, and YFe/sub 9/ phases exist. In the Y-Ni diagram intermediate phases of the following stoichiometry were positioned: Y/sub 3/Ni, Y/sub 3/Ni/sub 2/, YNi, YNi/sub 2/, YNi/sub 3/ YNi/sub 4/ i, YNi/sub 5/, and YNi/sub 9/. Finally, in the Y-Cu system, YCu, YCu/sub 2/, YCu/ sub 4/, and YCu/sub 6/ phases were found. Only one intermetallic compound had a melting point higher than that of yttrium. Although most of these phases had maximum melting points, a number of them was formed by peritectic reactions. (auth)
- Research Organization:
- General Electric Co. Aircraft Nuclear Propulsion Dept., Cincinnati
- NSA Number:
- NSA-15-013331
- OSTI ID:
- 4072020
- Report Number(s):
- APEX-583
- Country of Publication:
- United States
- Language:
- English
Similar Records
THE SOLID SOLUBILITY AND CONSTITUTION OF YTTRIUM IN IRON-20 TO 40 w/o CHROMIUM ALLOYS
Compatible phases of the Y sub 2 O sub 3 --CuO--Cu sub 2 O system in air