- Title
- Consequences on chemical diffusion in materials of sum-rule relations between phenomenological coefficients
- Creator
- Belova, Irina Veniaminovna; Murch, Graeme Elliot
- Relation
- Diffusion in Materials - DIMAT2004. (Krakow, Poland 18 - 23 July 2004)
- Publisher
- Trans Tech Publications
- Resource Type
- conference paper
- Date
- 2005
- Description
- In this overview, we discuss the sum-rule relating the phenomenological coefficients in random systems. First, we discuss the random alloy model itself Next, we present the basic sum-rule for diffusion via the vacancy mechanism in the random alloy model. We then describe two applications of this sum-rule, one to chemical diffusion in a multicomponent alloy, the other to chemical diffusion in strongly ionic mixed cation crystals. In the latter, we also present expressions linking the interdiffusion coefficient and the tracer diffusion coefficients and discuss the relationships with the Darken-Manning and Nernst-Platick equations. Next, we discuss the sum-rule for a vacancy-pair mechanism in strongly ionic mixed cation crystals. We then give an application of this sum-rule by describing chemical diffusion in that model. Again, we present expressions linking the interdiffusion coefficient and the tracer diffusion coefficients.
- Subject
- phenomenological coefficients; interdiffusion; chemical diffusion; tracer diffusion; tracer correlation factors; collective correlation; factors; random alloy; bound vacancy pairs; ionic-crystals; multicomponent alloys; manning; relations; matter transport; simulation; tracer
- Identifier
- uon:15
- Identifier
- http://hdl.handle.net/1959.13/24480
- Identifier
- ISBN:3-908451-07-8
- Language
- eng
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