DIFFUSION IN THE SYSTEM URANIUM-TITANIUM

Journal Article · Sat Oct 01 04:00:00 EDT 1960 · Acta Met.

DOI:https://doi.org/10.1016/0001-6160(60)90201-7· OSTI ID:4100835

Adda, Y; Philibert, J

The intermetallic diffusion in Ti--U alloys is studied at 650 to 1050 deg C by metallography, microhardness, and the Castaing microanalyser. The diffusion coefficient, the frequency factors, and the activation energies were determined in the gamma phase (centered cubic) for uranium concentrations of 0.05 to O.9. An important Kirkendall effect was in evidence and the intrinsic diffusion coefficients of uranium and titanium were calculated on the basis of Darken's relations. The results compared to those previously obtained for Zr-U alloys, show that the mobility of titanium atoms is higher than that of zirconium atoms. Furthermore, the supersaturation vacancies from the Kirkendall effect was evaluated to explain the difference in porosity observed in the couples U--Zr and Ti--U. Values of approximately 1O/sup -3/ were found for the two couples. It is concluded that the difference in porosity is caused by different conditions of nucleation. (auth)

• Research Organization: Centre d'Etudes Nucleaires, Saclay, France
• NSA Number: NSA-15-007794
• OSTI ID: 4100835
• Journal Information: Acta Met., Journal Name: Acta Met. Vol. Vol: 8
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ATOMS
CRYSTALLIZATION
DEFECTS
DIFFUSION
EXCITATION
HARDNESS
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
KIRKENDALL EFFECT
LABORATORY EQUIPMENT
LATTICES
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
NUCLEATE BOILING
NUMERICALS
PHASE DIAGRAMS
POROSITY
QUANTITY RATIO
STANDARDS
TITANIUM
TITANIUM ALLOYS
URANIUM ALLOYS
VACANCIES
VELOCITY
ZIRCONIUM
ZIRCONIUM ALLOYS