Mass Transport in Metallic Solids

✍ Scribed by Dr. H. Wever

• Publisher: John Wiley and Sons
• Year: 1963
• Tongue: English
• Weight: 797 KB
• Volume: 2
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.196302881

✦ Synopsis

Abstract

Mass transport in a metallic solid requires that the lattice units exchange places. This is made possible by lattice defects. Also, a circular interchange has to be discussed. Driving forces cause the superposition of directional motion over the random motion of site exchange: When a chemical potential gradient exists, isothermal diffusion occurs; with an electrical potential gradient, electrolytic transport takes place; and with a temperature gradient, the effect is thermal diffusion. Both concentrational changes and dimensional changes may accompany these processes. From observation of these phenomena, the mechanism by which lattice particles change places can be deduced. In addition, it is possible to calculate characteristic data, such as migration energy, imaginary change, and heat of transportation.