THE METALLURGY OF YTTRIUM AND THE RARE EARTH METALS. PART I. PHASE RELATIONSHIPS. Period covered: October 1958 to October 1959

Technical Report · Wed Jan 20 04:00:00 EST 1960

OSTI ID:4085895

Love, B

Partial constitutional diagrams were established for sixteen binary systems containing rare-earth metals. Erbium and yttrium form simple binary eutectic systems with tita nium. No compounds are present. The transition temperature of titanium is not significantly affected. Copper, tin, and cobalt form intermetallic compounds with erbium and yttrium. The melting points of the rare earths are rapidly lowered, eutectics forming with the respective compounds. Vanadium forms extensive (and chromium forms limited) liquid immiscibility regions with erbium and yttrium. Eutectics are formed at the rare-earth end of the systems. Terminal solubilities are low in all the above systems. The system erbium- zirconium in characterized by appreciable solubility of zirconium in erbium and extensive solubility of erbium in both alpha and beta zirconium. There are no intermetallic compounds. The alpha erbium and beta zirconium solid solutions enter into a simple eutectic reaction. A high temperature peritectic reaction involving beta erbium is suggested. The system yttrium- zirconium is similar in all major respects except that the solubility limits at both ends of the system are somewhat lower. Preliminary investigstion of the gadolinium- zirconium system indicated similarity in all major respects. Beryllium and ytterbium form an intermetallic compound. The terminal solubility of ytterbium in beryllium ie low. No eutectic is observed at the beryllium end of the system. The results obtained suggest zirconium as a promising alloying element. Evidence was found for the purification of vanadium and beryllium when these metals were melted together with rare earths. (authh)

• Research Organization: Research Chemicals, Inc., Burbank, Calif.
• NSA Number: NSA-15-011603
• OSTI ID: 4085895
• Report Number(s): WADD-TR-60-74(Pt.I); AD-242706
• Country of Publication: United States
• Language: English

Related Subjects

ALLOTROPY
BERYLLIUM
BERYLLIUM ALLOYS
CHROMIUM
CHROMIUM ALLOYS
COBALT ALLOYS
COPPER ALLOYS
ERBIUM
ERBIUM ALLOYS
EUTECTICS
GADOLINIUM ALLOYS
IMPURITIES
INTERMETALLIC COMPOUNDS
LIQUIDS
MELTING
MELTING POINTS
METALLURGY
METALS, CERAMICS, AND OTHER MATERIALS
MIXING
PERITECTICS
PHASE DIAGRAMS
RARE EARTHS
REACTION KINETICS
REFINING
SOLID SOLUTIONS
SOLUBILITY
THERMODYNAMICS
TIN ALLOYS
TITANIUM ALLOYS
VANADIUM
VANADIUM ALLOYS
YTTERBIUM
YTTERBIUM ALLOYS
YTTRIUM
YTTRIUM ALLOYS
ZIRCONIUM
ZIRCONIUM ALLOYS
ZIRCONIUM-ALPHA
ZIRCONIUM-BETA