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MSE 2090: Introduction to Materials Science
Chapter 5, Diffusion
Diffusion  how do atoms move through solids?
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Diffusion mechanisms
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Vacancy diffusion
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Interstitial diffusion
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Impurities
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The mathematics of diffusion
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Steadystate diffusion
(Fick’s first law)
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NonsteadyState Diffusion
(Fick’s second law)
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Factors that influence diffusion
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Diffusing species
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Host solid
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Temperature
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Microstructure
Chapter Outline
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MSE 2090: Introduction to Materials Science
Chapter 5, Diffusion
Diffusion is material transport by atomic motion
.
Inhomogeneous materials can become homogeneous by
diffusion. For an active diffusion to occur, the temperature
should be high enough to overcome energy barriers to
atomic motion.
What is diffusion?
results of an atomistic simulation of atomic mixing
homework project in MSE 4592/6270
3
MSE 2090: Introduction to Materials Science
Chapter 5, Diffusion
Interdiffusion (or impurity diffusion)
occurs in
response to a
concentration gradient
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This note was uploaded on 02/14/2012 for the course MSE 2090 taught by Professor Leoindzhiglei during the Fall '10 term at UVA.
 Fall '10
 leoindzhiglei

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