THE PHASE DIAGRAM OF THE NIOBIUM-TUNGSTEN-ZIRCONIUM TERNARY SYSTEM

Journal Article · Thu Nov 01 04:00:00 EST 1962 · Zh. Neorgan. Lhim.

OSTI ID:4753893

Savitskii, E N; Zakharov, A M

Although the binaries Nb--W, Nb--Zr, and W--Zr are known, there are no data available on the ternary system Nb--W-Zr and therefore the system was investigated by means of melting point determination, x-ray diffraction, and microhardness measurements, limiting the field of study to portions of the ternary system with W: Zr ratios of 4 : 1, 1 : 1, and 1 : 3 and examining the isothermal cross sections at 2000, 1600, and 1100 deg C. The peritectic and eutectic points at 2260 and 1660 deg C, respectively, agree well with data reported by R. F. Domagala et al. (Trans. AIME 197: 73 (1953)). W and Zr are jointly soluble in Nb in the solid state only to a limited extent; this solubility decreases strongly with temperature. The compound W/sub 2/Zr was found to be in equilibrium with the alpha -Nb solid solution; this compound had the highest microhardness of the system, amounting to 778 to 804 kg/mm/sup 2/ of the system. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-003531
• OSTI ID: 4753893
• Journal Information: Zh. Neorgan. Lhim., Journal Name: Zh. Neorgan. Lhim. Vol. Vol: 7
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ALLOTROPY
DIFFRACTION
EUTECTICS
HARDNESS
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
MEASURED VALUES
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM
NIOBIUM ALLOYS
PERITECTICS
PHASE DIAGRAMS
REACTION KINETICS
SOLID SOLUTIONS
TUNGSTEN ALLOYS
X RADIATION
ZIRCONIUM ALLOYS