METALLURGY OF TUBALLOY URANIUM . Progress Report by Battelle Memorial Institute.; U.S. Atomic Energy Commission.

By Battelle Memorial Institute.; U.S. Atomic Energy Commission. Division of Technical Information.; United States. Dept. of Energy. Office of Scientific and Technical Information

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Tubal l o y-Aluminum - * A1 l o y s I - Fabrication r- * - Melts w e i e h i n g 10 t o 15 poun'ds were m a d e i n a c l a y - g r a p h i t e c r u c i b l e , u s i n g a g a s - a i r f u r n a c e o f aluminum w i t h a d d i t i o n s o f t u b a l l o y from 2 t o 30%. For t h e lower a l l o y s , t h e aluminum was allowed t o 1 r e a c h about 1500OF. when t h e a d d i t i o n w a s made, s t i r r i n g w i t h a v a p h i t e rod. , o r t h e r e a b o u t s . and poured i n t o an _.

Continued pumping f o r an hour a t 1200°C. renoved v e r y small amounts o f g a s . as removed by t h e T o e p l e r pump, t h e f i n a l composition was computed t o be TWO. *. From t h i s experiment and o t h e r s , i t i s e s t i m a t e d t h a t t h e n i t r o g e n p r e s s u r e i n e q u i l i b r i u m w i t h TUN a t 1200°C. i s l e s s t h a n one micron. 88 A. The h i g h e r n i t r i c ; e s formed i n e q u i l i b r i u m w i t h n i t r o g e n a t temperatures" between 800°C.

N i t r i c - a c e t i c e t c h , 25oX. Figure 9. - S t r u c t u r e s o b t e i n e d i n t h e 1& Mechanical p o l i s h . iri ng plysis. _= Tu ~ ~ lZO0 l ! inp, 0'. 0 7". s 2-5. 11r7ii, 36 V ~ . S S ~ P , II 180G It 7 passes, one a u n e a l . 200'1, 39 uassce. OO t o . 080". I, 1,. 10 A :"7. o e? All a l l o y s , e x c e n t lg$* showpd CPDSB ~ ' ~ e c ~ i n g an? t this Ghlc'rnesfi. -29- 34031 g*G$ Tu. Eypo-eutectic. 8% TU. l$ 34548 Tu. S l i g h t l y hyper-eutectic. 34556 2 9 . M Tu.

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