The solution to Fick's 2nd Law provided in the textbook (Eq. 5.11) for the process of carburization (see textbook Example 5.3 for a reminder). However, if one takes.cg 0, then this expression can also be used for the reverse process of decarburization. I.e., carbon (initially at composition co) is removed from a component through its surface held at c, = 0. This is described by the similar expression: = & = erf (2/₁) This expression describes the concentration profile (the composition field) as the solute (carbon in this case) diffuses out of the component (steel in this case) with an initial concentration of Co. This situation can be accomplished by placing the steel in a vacuum at elevated temperature. = If the initial composition of the carbon in the steel is co 0.3 wt%, calculate the carbon concentration (in wt%) at a distance 0.2mm from the surface of the component after 1 hour of decarburization.
The solution to Fick's 2nd Law provided in the textbook (Eq. 5.11) for the process of carburization (see textbook Example 5.3 for a reminder). However, if one takes.cg 0, then this expression can also be used for the reverse process of decarburization. I.e., carbon (initially at composition co) is removed from a component through its surface held at c, = 0. This is described by the similar expression: = & = erf (2/₁) This expression describes the concentration profile (the composition field) as the solute (carbon in this case) diffuses out of the component (steel in this case) with an initial concentration of Co. This situation can be accomplished by placing the steel in a vacuum at elevated temperature. = If the initial composition of the carbon in the steel is co 0.3 wt%, calculate the carbon concentration (in wt%) at a distance 0.2mm from the surface of the component after 1 hour of decarburization.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:The solution to Fick's 2nd Law provided in the textbook (Eq. 5.11) for the process of carburization
(see textbook Example 5.3 for a reminder). However, if one takes.Cs
0, then this expression can
also be used for the reverse process of decarburization. I.e., carbon (initially at composition co) is
removed from a component through its surface held at c, = 0. This is described by the similar
%3D
expression:
erf (
2 Dt
This expression describes the concentration profile (the composition field) as the solute (carbon in
this case) diffuses out of
component (steel in this case) with an initial concentration of co. This
situation can be accomplished by placing the steel in a vacuum at elevated temperature.
If the initial composition of the carbon in the steel is co =
0.3 wt%, calculate the carbon
concentration (in wt%) at a distance 0.2mm from the surface of the component after 1 hour of
decarburization.
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