ENS167 Fundamentals of Materials Science and Engineering Diffusion PDF

ENS167 Fundamentals of Materials Science and Engineering Diffusion Assoc. Prof. Maria Cristina P. Vegafria, PhD Department of Chemical Engineering & Technology MSU-Iligan Institute of Technology  Issues to address: How does diffusion occur?...

ENS167 Fundamentals of Materials Science and Engineering Diffusion Assoc. Prof. Maria Cristina P. Vegafria, PhD Department of Chemical Engineering & Technology MSU-Iligan Institute of Technology  Issues to address: How does diffusion occur? Why is it an important part of processing? How can rate of diffusion be predicted for some simple cases? How does diffusion depend on structure and temperature? Diffusion  Diffusion Demo Diffusion  Diffusion: The Phenomena Diffusion  Diffusion: The Phenomena Diffusion  Diffusion Mechanisms Diffusion  Diffusion Simulation Diffusion  Interstitial Simulation Diffusion  Processing Using Diffusion Diffusion  Processing Using Diffusion Diffusion  Modelling Diffusion: Flux Diffusion  Concentration Profiles & Flux Diffusion  Steady State Diffusion Diffusion  Steady State Diffusion: Example Diffusion  Non Steady State Diffusion Diffusion  Non Steady State Diffusion: Example Diffusion  Processing Question Diffusion  Diffusion Demo: Analysis Diffusion  Data from Diffusion Demo Diffusion  Diffusion and Temperature Diffusion  SUMMARY Diffusion is FASTER for: Diffusion is SLOWER for: Open crystal structures Close-packed structures Lower melting T materials Higher melting T materials Materials with secondary bonding Materials with covalent bonding Smaller diffusing atoms Larger diffusing atoms Cations Anions Lower density materials Higher density materials Diffusion