chap6_4

chap6_4 - Fundamental of Materials Fundamental of Materials...

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Unformatted text preview: Fundamental of Materials Fundamental of Materials Prof: Tian Min Bo Tel: 62795426 62772851 E-mail: tmb@mail.tsinghua.edu.cn Department of Material Science and Engineering Tsinghua University. Beijing 100084 Lesson twenty-seven 6.4 Non-Steady-State Diffusion ( ) 6.4 Non-Steady-State Diffusion ( ) (for one dimensional diffusion only) (for one dimensional diffusion only) t C . Infinite system . Infinite system ( 29 1 2 2 x C D t C = ( 29 3 ) tion transforma Boltzman ( let t x = ( 29 2 for for at 2 1 < = = = x C C x C C t 1. Formula 1. Formula ( 29 4 d d 1 1 ) d d 1 ( d d ) 1 ( d d ) 2 ( d d ) 2 ( d d 2 2 2 2 C t t C t x C t C x C t C t t x C t C = = = - =- = ( 29 ( 29 ( 29 5 d d d d 2 1 in 4 put 2 2 C t D C t =- ( 29 6 d d let C u = ( 29 ( 29 ( 29 7 4 ln d d 2 d d 2 5 in 6 put 4 2 2 D Ae u A...
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This note was uploaded on 10/15/2011 for the course ENG 242 taught by Professor Mingjiezhao during the Spring '11 term at BYU.

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chap6_4 - Fundamental of Materials Fundamental of Materials...

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