homework5 - (b) Write an expression for the diffusion...

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Matsc 503 Kinetics of Materials Processes Spring 2002 Problem Set #5 Due February 22 1. Discuss the influence of zinc chloride addition to the diffusivity of all ions (Zn, Na, and Cl) in a single-crystal NaCl from room temperature to the melting temperature. 2. Consider a metal deficient oxide, Fe 1-x O, which contains high concentration of vacant iron sites. (a) Write the defect reaction for Fe 1-x O.
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Unformatted text preview: (b) Write an expression for the diffusion coefficient of Fe in Fe 1-x O. (c) Draw schematically the dependence of D Fe on temperature (i.e., ln(D Fe ) vs. 1/T) in Fe 1-x O and indicate on your plot the slope of the straight line. (d) Draw schematically the dependence of D Fe on partial pressure of O 2 (i.e., ( ) ( ) 2 ln vs O Fe P D ln ) and indicate on your plot the slope of the straight line....
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This note was uploaded on 01/19/2010 for the course MAT SCI 503 taught by Professor Chen during the Spring '02 term at Pennsylvania State University, University Park.

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