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Surface diffusion occurs

См. также в других словарях:

  • Surface diffusion — [ adatom diffusing across a square surface lattice. Note the frequency of vibration of the adatom is greater than the jump rate to nearby sites. Also, the model displays examples of both nearest neighbor jumps (straight) and next nearest neighbor …   Wikipedia

  • Diffusion hardening — Schematic cutaway view of a diffusion hardened metal gear Diffusion hardening is a process used in manufacturing that increases the hardness of steels. In diffusion hardening, diffusion occurs between a steel with a low carbon content and a… …   Wikipedia

  • diffusion — F/A/V the scattering or random redistribution of a sound wave from a surface. It occurs when surfaces are at least as long as the sound wavelengths, but not more than four times as long …   Audio and video glossary

  • Surface photovoltage — (SPV) measurements are a widely used method to determine the minority carrier diffusion length of semiconductors. Since the transport of minority carriers determines the behavior of the p n junctions that are ubiquitous in semiconductor devices,… …   Wikipedia

  • Diffusion damping — Physical cosmology Universe · Big Bang …   Wikipedia

  • diffusion — /di fyooh zheuhn/, n. 1. act of diffusing; state of being diffused. 2. prolixity of speech or writing; discursiveness. 3. Physics. a. Also called migration. an intermingling of molecules, ions, etc., resulting from random thermal agitation, as in …   Universalium

  • Diffusion boundary layer — The diffusion boundary layer is a thin (usually on the scale of micrometers) layer of fluid which is not mixed with the main body of the fluid (or cellular arrangement in the case of organisms), by virtue of its proximity to the fluid s edge. In… …   Wikipedia

  • Molecular diffusion — This article is about spontaneous dispersion of mass. For a more generic treatment of diffusion, see Diffusion. Diffusion from a microscopic and macroscopic point of view. Initially, there are solute molecules on the left side of a barrier… …   Wikipedia

  • Momentum diffusion — refers to the diffusion, or spread of momentum between particles (atoms or molecules) of matter, usually in the liquid state. In the case of the laminar flow of a liquid past a solid surface, momentum diffuses across the boundary layer which… …   Wikipedia

  • Sintering — is a method used to create objects from powders. It is based on atomic diffusion. Diffusion occurs in any material above absolute zero but it occurs much faster at higher temperatures. In most sintering processes the powdered material is held in… …   Wikipedia

  • gas — gasless, adj. /gas/, n., pl. gases, v., gassed, gassing. n. 1. Physics. a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid. 2. any such fluid or mixture of fluids. 3. any… …   Universalium

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