QUARTERLY METALLURGICAL PROGRESS REPORT NO. 13, OCTOBER 1, 1961 TO DECEMBER 31, 1961

Technical Report · Wed Oct 31 04:00:00 EST 1962

OSTI ID:4832596

The Hf-V and Hf-C phase diagrams are studied. The weight gains in water of as-cast and heat-treated Gdstainless steel alloys are determined for Gd concentrations up to 35%. Types of alloy systems are determined for 20 binary combinations of Gd, Er, or Dy with metals or Si. Diffusion bonding of Nb-Ta alloys is discussed. The effects of compacting, sintering, and hammer forging operations on mixed powders of gadolinium oxide and Nb are described. Hardnesses, transformation temperatures, and melting points are determined for Th- rich alloys of Ho, Nd, and Pr prepared by nonconsumable-electrode arc melting. Separation of Hf from Zr is accomplished, from fused systems oi zircon, potassium silicofluoride, and potassium carbonate, Fractional crystallization of potassium zirconium fluoride from potassium hafnium fluoride in leach liquors is also studied as a separation method. The effects of process variables on damage to cold-mold crucibles are studied. The purity and physical properties of electron- beam-melted Hf is examined. The preparation of 5.46- to 10.97-wt%-C hafnium carbides is reported. UC/sub 2/-graphite and U/sub 3/O/sub 8/graphite mixes are evaluated for use as consumable electrodes in arc melting. (T.F.H.)

• Research Organization: Bureau of Mines. Albany Metallurgy Research Center, Ore.
• NSA Number: NSA-16-017967
• OSTI ID: 4832596
• Report Number(s): USBM-U-887
• Country of Publication: United States
• Language: English

Related Subjects

ALLOYS
ANIONS
BONDING
CASTING
COMPACTS
CRUCIBLES
CRYSTALS
DIFFUSION
DYSPROSIUM COMPOUNDS
EFFICIENCY
ELECTRIC ARCS
ELECTRODES
ELECTRON BEAMS
ERBIUM COMPOUNDS
FORGING
GADOLINIUM ALLOYS
GADOLINIUM OXIDES
GRAPHITE
HAFNIUM
HAFNIUM ALLOYS
HAFNIUM CARBIDES
HAFNIUM FLUORIDES
HARDNESS
HEAT TREATMENTS
HOLMIUM COMPOUNDS
IMPURITIES
LEACHING
LIQUIDS
MECHANICAL PROPERTIES
MELTING
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
MIXING
NEODYMIUM ALLOYS
NIOBIUM ALLOYS
OXIDES
PHASE DIAGRAMS
POTASSIUM CARBONATES
POTASSIUM FLUORIDES
POTASSIUM SILICATES
POWDERS
PREPARATION
PROMETHIUM ALLOYS
QUANTITATIVE ANALYSIS
SEPARATION PROCESSES
SILICIDES
SILICON