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1 I I I . . ANP QUARTERLY PROGRESS REPORT TABLE 6.8. SUMMARY OF STATIC TESTS OF CARBIDES AT 15OO0F FOR 100 hr Average Apparent Weight Material Density D imen siona I Attack 3 Porosity Change* Tested (g/cm ) Change* (mils) (760) (%Io) ( %) Tested in Sodium Remarks B4C 2.51 3.5 -6.5 Specimen cracked and fell apart during test Tic 4.81 1.3 + 0.3 0 0 No attack; particles bonded so well that it was difficult to distinguish individual particles in unetched specimen ZrC 6.91 0.8 0 +0.1 0 No attack; particles well bonded Cr3C2 6.59 2.2 0 -0.4 0 No attack; particles not well bonded B4c Tested in NaF-ZrF4-UF4 (53.5-40-6.5 mole %) +0.1 -0.4 5 Unidentified phase on one side of specimen that had a maximum thickness of 14 mils Ti C 0 +0.1 0 No attack; as-received and tested specimens not bonded nor formed so well as those tested in sodium ZrC +0.3 Major portion of pore s fluoride mixture Cr3C2 +0.2 No attack B4C Tested in Lithium - 12.2 Specimen expanded and crocked; original, dark, semimetallic luster dulled TIC 0 0 0 No attack; macroscopic color slightly I i ghter ZrC +0.2 -1.1 0 No attack Cr3C2 +0.2 -1.2 0 No attack; small crack in middle of specimen; metallic luster disappeared *The average dimensional change (%) is the average of the width, height, and length changes, whereas the weight change (%) represents a single value. high-temperature corrosion of sodium, lithium, and material was corrosion tested in water at various temperatures. Specimens of this material were carefully cleaned just prior to testing to remove 86 .,*-Ts.;;r*===tw?%r.. - *%. has been pro-? surface films, chiefly Li,N, which form on exposure to air, A cleaned specimen was found to gain t 0.088 mg/cm2 after standing in the atmosphere for hielding. i 6 hr. The weight losses of specimens tested at :. r
- .04 - .02 - .03 I 0 z .04 _I__ PERIOD ENDING DECEMBER 70,7954 Fig. 6.10. (a) As-Received Cr,C,. (b) Cr,C, After Exposure to NaF-ZrF,-UF, (53.5-40-6.5 mole X) at 1500°F for 100 hr. Unetched. 1OOX. various temperatures in water for 15 min are tabu- lated below: Temperature Weight Loss RUBIDIUM INVESTIGATIONS The results of preliminary tests of the resistance of lnconel to attack by molten rubidium were dis- cussed in the previous report.2 Static tests at 1500 and 1650OF have shown a maximum attack of from 1 to 2 mils in 100 hr. The attack has been corrosion of lnconel problem, a dynamic test was conducted. The resistance of lnconel to corrosion by flowing liquid and vaporized rubidium in a closed system incorporating a tempera- turegradient was determined by means of a dynamic loop apparatus, somewhat similar in appearance 87
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ORNL DOCUMENT REFERENCE LIBRARY, Y-
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.. II 1. G. M. Adamson 2. R. G. Aff
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4 . CRITICAL EXPERIMENTS ..........
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Removal of Xe13' from Molten Fluori
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ANP QUARTERLY PROGRESS REPORT main
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1. CIRCULATING-FUEL AIRCRAFT REACTO
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clean reactor at a low power for a
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for more than 0.6 Mw in the sodium,
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i PERIOD ENDING DECEMBER 70,7954 Fi
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Analytical studies, layout work, an
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XENON- REMOVAL SYSTEM 4 BLEED CIRCU
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PERIOD ENDING DECEMBER 70, 7954
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PERIOD ENDING DECEMBER 70, 7954 Fig
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