Ion beam mixing of U-based bilayers

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Journal of Materials Research; (USA)

DOI:https://doi.org/10.1557/JMR.1991.1175· OSTI ID:5691988

Rossi, F ^[1]; Nastasi, M; Cohen, M; Olsen, C ^[2]; Tesmer, J R ^[3]; Egert, C ^[4]

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1. Center for Materials Science, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
2. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
3. Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
4. Martin Marietta Y12 Plant, Oak Ridge, Tennessee 37831 (USA)

Bilayer samples of U/Al, U/Ti, U/Si, and U/C have been ion beam mixed with 400 keV Ar and U/Al with Xe ions at doses from 2{times}10{sup 15} to 1{times}10{sup 17} ions/cm{sup 2}. Mixing experiments were performed at various temperatures between 77 and 420 K. The amount of interfacial mixing, 4{ital Dt}, follows a linear dose dependence below a critical temperature depending on the system studied. Below this temperature, the mixing efficiency, defined as {partial derivative}(4{ital Dt})/{partial derivative}{Phi} where 4{ital Dt} is the mixing and {Phi} is the dose, is temperature independent. Its value, as well as the value of the transition temperature, agrees well with the thermodynamical model of chemically biased diffusion in a thermal spike for the four systems tested. The transition between the thermal spike regime and the temperature enhanced mixing regime was interpreted on the basis of an intracascade mechanism. The formation of an intermetallic compound in the U/Al system was detected and interpreted on a qualitative basis by crystallographic considerations.

• OSTI ID: 5691988
• Journal Information: Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 6:6; ISSN JMREE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ACTINIDES
ALLOYS
ALUMINIUM
ARGON IONS
ATOM COLLISIONS
BEAMS
CARBON
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY RANGE
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
ION BEAMS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 100-1000
LOW TEMPERATURE
MEDIUM TEMPERATURE
METALS
MIXING
NONMETALS
SEMIMETALS
SILICON
TITANIUM
TRANSITION ELEMENTS
URANIUM
XENON IONS