Ion beam modifications of near-surface compositions in ternary alloys

Conference · Thu Nov 01 04:00:00 EST 1990

OSTI ID:6412043

Lam, N Q; Tang, S; Yacout, A M; Rehn, L E ^[1]; Stubbins, J F ^[2]

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1. Argonne National Lab., IL (USA)
2. Illinois Univ., Urbana, IL (USA)

Changes in the surface and subsurface compositions of ternary alloys during elevated-temperature sputtering with inert-gas ions were investigated. Theoretically, a comprehensive kinetic model which includes all the basic processes, such as preferential sputtering, displacement mixing, Gibbsian segregation, radiation-enhanced diffusion and radiation-induced segregation, was developed. This phenomenological approach enabled to predict the effects of each individual process or of a combination of processes on the compositional modification in model alloys. Experimentally, measurements of compositional changes at the surface of a Ag-40at%Au -- 20at%Cu alloy during 3-keV Ne{sup +} bombardment at various temperatures were made, using ion scattering spectroscopy. These measurements were interpreted on the basis of the results of theoretical modeling. 8 refs., 2 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6412043
• Report Number(s): CONF-900936-25; ON: DE91006035
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOY SYSTEMS
BEAMS
CHARGED PARTICLES
ION BEAMS
IONS
MODIFICATIONS
NEON IONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SPUTTERING
SURFACES
TEMPERATURE EFFECTS
TERNARY ALLOY SYSTEMS