Ch_5_Diffusion_in_Solids_amended_Compatibility_Mode_ -...

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INTRODUCTION TO MATERIALS SCIENCE PSMMY Jan2010 1 Learning Outcomes Today… what do I want you to learn? Name and describe the two atomic mechanisms of diffusion. Discus on th factor tha affec diffusion PSMMY Jan2010 2 Discuss the factors that affect process. Distinguish between steady-state and non-steady state diffusion. Write Fick’s first law in equation form, and define all parameters. Learning Outcomes Note the kind of diffusion for which Fick’s first law is applied. Today… what do I want you to learn? PSMMY Jan 2006 3 Apply Fick’s first law to steady-state diffusion problems. Calculate the diffusion coefficient for some material at a specified temperature, given the appropriate diffusion constants. TODAY… PSMMY Jan2010 4 DIFFUSION 9 movement of atoms/ions/electrons/holes within the material caused by concentration gradient and temperature. PSMMY Jan2010 5 9 2 conditions must be met •there must be an empty adjacent site •the atom must have sufficient energy to break bonds with its neighbouring atoms Types of Diffusion ± 1. 2.
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This note was uploaded on 03/20/2010 for the course IMSE tb1073 taught by Professor Musharaf during the Spring '10 term at University of Malaya.

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Ch_5_Diffusion_in_Solids_amended_Compatibility_Mode_ -...

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