Structural changes of the laves phases in ZrAl₂ and UAl₂ by uranium or zirconium addition

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Naturwissenschaften

DOI:https://doi.org/10.1007/BF00622102· OSTI ID:4841671

Steeb, Siegfried; Petzow, G�nter

According to structural observations on Al- U- Zr alloys, a quasibinary layer (Laves phase) exists between ZrAl₂in the Al-Zr system and UAl₂ in the Al-U system. Guinier exposures with monochromatic CuK/sub #aa/ radiation of cast alloys in the quasibinary layer show that the UAl₂ lattice is maintained with high Zr additions. A pronounced solubility of U in ZrAl₂ could be assumed since the lattice constants of ZrAl₂ undergo no noticeable change after U addition. Precision determinations of the lattice constants were carried out on heat-treated alloys of quasibinary layers in order to test and refine the results from Guinier diagrams. The lattice constant for pure UAl₂ was measured as 7.7475 kX. Zr additions up to 22 at.% Zr cause an almost linear decrease of the UAl₂ lattice constants. The lattice constants of ZrAl₂ proceed parallel to the concentration axis for U additions up to 10% U. The number of atoms in the elementary cell was determined. The mechanism of the contraction of the UAl₂ lattice from Zr addition was described.

• Research Organization: Max-Planck-Institut fur Metallforschung, Stuttgart
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-028070
• OSTI ID: 4841671
• Journal Information: Naturwissenschaften, Journal Name: Naturwissenschaften Journal Issue: 12 Vol. 48; ISSN 0028-1042
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

36 MATERIALS SCIENCE
ALPHA PARTICLES
ALUMINUM ALLOYS
ATOMS
CASTING
COPPER
DIAGRAMS
EFFICIENCY
HEAT TREATMENTS
IMPURITIES
INTERMETALLIC COMPOUNDS
LATTICES
LAVES PHASES
LAYERS
MONOCHROMATORS
PHASE DIAGRAMS
QUANTITATIVE ANALYSIS
REACTION KINETICS
SOLUBILITY
SPECTRAL SHIFT
TESTING
URANIUM
URANIUM ALLOYS
VARIATIONS
ZIRCONIUM
ZIRCONIUM ALLOYS