FINAL REPORT ON MISCIBILITY GAPS IN Nb-U AND Nb-U-Zr SYSTEMS Page: 6 of 99
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Zirconium pellets were prepared by arc melting low Hf
sponge supplied by A.E.R.E. Harwell, and having the following
Fe ...... 0.02%
N2 .... 0.005%
Cr ...... 0.002%
Pb ...... (0.0%
Mg ...... 40.01
Hf ...... 0.03 + 25%
Al ...... 510 p.p.m. + 15%
02.. 750 p.p.m. mean range 500-1000 p.p.m.
(b) Selection of Alloy Compositions
The U-Nb diagram proposed by Sawyer I was used as a first
guide to selecting the compositions of the binary alloys. Further
alloys were then prepared in the light of the results obtained.
The appearance of the ternary diagram will be dominated by
the behaviour of the miscibility gaps which are a feature of each
of the limiting binary systems, and alloy compositions were chosen
with this in mind to determine the limits of these miscibility gaps
in the ternary systems. Further alloys were selected to locate more
accurately the limit of the U-Nb miscibility gap. The compositions
of the binary and ternary alloys are given in Tables 1 and 2, while
their positions on the ternary diagram are shown in Fig. 6.
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FINAL REPORT ON MISCIBILITY GAPS IN Nb-U AND Nb-U-Zr SYSTEMS, report, January 1, 1959; United States. (digital.library.unt.edu/ark:/67531/metadc877724/m1/6/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.