Illinois MATSE 280 Introduction to Engineering Materials, Lecture 6: Diffusion in Solids

By Duane Douglas Johnson1, Omar N Sobh2

1. Iowa State University (formerly University of Illinois Urbana-Champaign) 2. University of Illinois at Urbana-Champaign

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Diffusion in Solids


  • How does diffusion occur?
  • How can the rate of diffusion be predicted forsome simple cases?
  • How does diffusion depend on structure and temperature


  • Diffusion- Steady and Non-Steady State
  • Simple Diffusion
  • Inter-diffusion
  • Self-diffusion
  • Substitution-diffusion
  • Diffusion Mechanisms
  • Processing using Diffusion
  • Modeling rate of diffusion
  • Steady-state Diffusion
  • Example: Chemical Protection Clothing
  • Example: Diffusion in steel plate
  • Example: Diffusion of radioactive atoms
  • Where can we use Fick’s Law?
  • Non-Steady-State Diffusion
  • Example: Non-Steady-State Diffusion
  • Example: Processing
  • Diffusion Analysis
  • Diffusion and Temperature
  • Example: Comparing Diffuse in Fe
  • Connecting Holes, Diffusion, and Stress
  • Other Types of Diffusion (Beside Atomic)
  • Inter-diffusion (diffusion couples)
  • Kirkendall Effect: What if DA > DB?
  • Diffusion in Compounds: Ionic Conductors
  • Ionic Conduction: related to fuel cells
  • Example: solid-oxide fuel cell (SOFC)
  • Ceramic Compounds: Al2O3
  • Summary: Structure and Diffusion


This notes were developed by Prof. Duane Johnson and uploaded by Omar Sobh.

Cite this work

Researchers should cite this work as follows:

  • Duane Douglas Johnson; Omar N Sobh (2008), "Illinois MATSE 280 Introduction to Engineering Materials, Lecture 6: Diffusion in Solids,"

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