Diffusion along (001) tilt boundaries in the Au/Ag system--I. Experimental results
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Physics
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering
The parameter, [delta][sub b]D[sup Ag][sub b], for the chemical diffusion of Ag along the tilt axes of a series of (001) symmetric tilt boundaries in the Au/Ag system, was measured as a function of temperature and tilt angle at relatively low temperatures. (D[sup Ag][sub b] = boundary diffusivity; [delta][sub b] = boundary thickness.) Sixteen boundaries were studied using a newly developed surface accumulation method. [delta][sub b]D[sup Ag][sub b] was found to vary quite smoothly with tilt angle (i.e. no sharp minima or cusps at low-[Sigma] misorientations were observed) in a manner consistent with the structural unit model. The activation energies were found to be smooth functions of the tilt angle and to lie in the range 0.70-0.85eV. The pre-exponential factors in the Arrhenius expression for [delta][sub b]D[sub b] were [approximately]3 orders of magnitude smaller than many of those reported in the literature for diffusion at higher temperatures.
- DOE Contract Number:
- FG02-87ER45310
- OSTI ID:
- 6272525
- Journal Information:
- Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 41:1; ISSN 0956-7151; ISSN AMATEB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ACTIVATION ENERGY
ARRHENIUS EQUATION
ATOM TRANSPORT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DATA
DIFFUSION
DIMENSIONS
DISLOCATIONS
ELEMENTS
ENERGY
EQUATIONS
EXPERIMENTAL DATA
GOLD
GRAIN BOUNDARIES
GRAIN ORIENTATION
INFORMATION
INTERFACES
INTERSTITIALS
LINE DEFECTS
METALS
MICROSTRUCTURE
NEUTRAL-PARTICLE TRANSPORT
NUMERICAL DATA
ORIENTATION
POINT DEFECTS
RADIATION TRANSPORT
SILVER
TEMPERATURE DEPENDENCE
THICKNESS
TRANSITION ELEMENTS
VACANCIES