ANNUAL SUMMARY RESEARCH REPORT IN METALLURGY FOR JULY 1958-JUNE 1959
E 9 6 = ; - on liquid-liquid extraction as a means for purifying inorganic materials of interest in pure metal preparation was continued. The distribution of Pa/sup 233/ in the pyrometallungical separation of uranium from uranium--thorium alloys was investigated. Work has continued on the separation of minor constituents from uranium by selective oxidation or reduction reactions utilizing liquid zinc and KCI--LiCI eutectic as solvents, ZnCl/sub 2/ as oxidizing agent, and magnesium or calcium as reducing agents. The distribution of Mo, Zr, Cr, and U between KCI-- LiCI eutectic containing excess ZnCl/sub 2/ and Zn was studied. To study the effectiveness of a Zn-rich Mg or Ca alloy in reducing Pa/sup 233/ from the salt phase, samples were equilibrated at 700 deg C with a Zn phase containing 2 to 4 wt. % Ga or Mg or both. The possibility of precipitating solutes as hydrides from liquid-metal solvents by contacting the solutions with hydrogen at one atmosphere pressure is being investigated. Preparation of Pure Compounds. Work on the preparation of high- purity V/sub 2/O/sub 5/, as one phase of a program for the preparation of high- purity V compounds, was completed. Work on the large-scale preparation of YF/sub 3/ was continued. Metal Preparation and Purification Studies. The purification of V by the iodide process is being investigated. Work was continued on the preparation of Nb by the reduction of Nb/sub 2/O/sub 5/ with carbon. Investigation of the purification of Nb metal by the iodide process has continued with extension of feed metal temperatures to 800 deg C. As a result of the mixtures of Nb and NbI/sub 3/ which were obtained from the iodide process feed methl, a method was sought for recovery of the metal for reuse in the iodide purification. A Pyrex apparatus for the purification of Th by the iedide process was used to supply small research quantities of the metal. The development of the Mg reduction of ThCl/sub 4/ as a method of preparing high-purity Th is being investigated. Work is presented in the preparation of high-purity Y. Several different approaches were tried in attempts to remove oxygen from Y metal or to prevent the introduction of oxygen in precessing. The work on the carbon reduction of UO/sub 2/ toward increased yield and reduced carbon content of the metal has met with only limited success. The method of producing high-purity Ta by the carbon reduction of tantalum Pentoxide at high temperathre in a vacuum is being studied in some detail. The purification of Ca and Li by vacuum sublimation and distillation is reported. Alloy Investigations. Experimental determinations of the Th content in liquid Zn equilibrated with an excess of solid Th/sub 2/Zn/sub 17/ at various temperatures was completed. The vapor pressure of Zn over two-phase alloys consisting of Th--Th/sub 2/Zn, Th/sub 2/Zn - ThZn/sub 2/, ThZn/sub 2/-- ThZn/sub 4/, and ThZn/sub 4/-- Th/sub 2 /Zn/sub 17/ was measured as a function of temperature by the dew-point method. Crystal structures and thermodynamic properties of the compounds in the Th--Zn system were investigated. The U--Re system is being investigated by various standard techniques. The investigation of the solubility limits of the Th--Mo system is being continued. Crystallographic and phase relationships of the Ni--Zr and Ni- Hf alleys are being investigated. The basic process used to prepare Nb--Al alloys is reported. Tensile properties are reported for some Al-rich Al--Nb alleys. Phase studies are presented for the Co--Zr alloy. The magnesium vapor pressures over Mg--Cu and Mg--Ni alloys were measured for various compositions by the Knudsen effusion methed in the temperature range 400 to 1100 deg K. Solid State Investigations. Thermal expansion in single crystals of Y, Be, and Zn was measured both parallel and perpendicular to the unique axis. Measurement of five independent elastic constants of single crystalline Be was completed. The crystal structure of the intermetallic com
- Research Organization:
- Ames Lab., Ames, Iowa
- DOE Contract Number:
- W-7405-ENG-82
- NSA Number:
- NSA-14-018111
- OSTI ID:
- 4147495
- Report Number(s):
- IS-17
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
Similar Records
CHEMICAL ENGINEERING DIVISION SUMMARY REPORT FOR OCTOBER, NOVEMBER, DECEMBER 1958
CHEMICAL ENGINEERING DIVISION SUMMARY REPORT, JANUARY-MARCH 1962
Related Subjects
ALUMINUM ALLOYS- COBALT ALLOYS- NIOBIUM ALLOYS- PHASE DIAGRAMS- PREPARATION- TENSILE PROPERTIES- ZIRCONIUM ALLOYS
BERYLLIUM- CRYSTALS- ELASTICITY- EXPANSION- MEASURED VALUES- TEMPERATURE- YTTRIUM- ZINC
CALCIUM- CALCIUM ALLOYS- CHEMICALS- CHROMIUM- DISTRIBUTION- EUTECTICS- HIGH TEMPERATURE- HYDRIDES- HYDROGEN- IMPURITIES- LIQUID METALS- LITHIUM CHLORIDES- MAGNESIUM- MAGNESIUM ALLOYS- METALLURGY- METALS- MOLYBDENUM- OXIDATION- POTASSIUM CHLORIDES- PRECIPITATION- PREPARATION- PROTACTINIUM 233- REDUCTION- SEPARATION PROCESSES- SOLUTIONS- SOLVENT EXTRACTION- SOLVENTS- THORIUM ALLOYS- URANIUM- URANIUM ALL