Mass transport equations unifying descriptions of isothermal diffusion, thermomigration, segregation, and position-dependent diffusivity

Via the combined use of the jump frequency and chemical force formulation methods, a set of generalized mass transport equations has been derived. This set of equations unifies the descriptions of isothermal diffusion, thermomigration induced by a thermal gradient, and segregation and the position-dependent diffusivity arising from the crystal inhomogeneity. The equations reproduce Fick's laws for the isothermal homogeneous crystal case, and the diffusion-segregation equations for the isothermal inhomogeneous crystal case. Also, a new expression for the heat of transport of thermomigration is obtained. © 1998 American Institute of Physics.

Full Text

Duke Authors

Cited Authors

  • Tan, TY

Published Date

  • 1998

Published In

  • Applied Physics Letters

Volume / Issue

  • 73 / 18

Start / End Page

  • 2678 - 2680

Digital Object Identifier (DOI)

  • 10.1063/1.122551

Citation Source

  • SciVal