Decarburization] An FCC iron-carbon alloy initially containing carbon with the concentration, C0, is exposed to an oxygen-rich and virtually carbon-free atmosphere. Under the given conditions, the carbon diffuses from the alloy and reacts at the surface with the oxygen in the atmosphere, meaning that the carbon concentration at the surface position is maintained essentially at 0 wt% C. The subproblems are independent. (1) Determine the diffusion coefficient at the temperature T given below. Use T = 1250 °C (2) When the value of D is given below, what position will the carbon concentration be Cx after a treatment for the time, t? Use D = 1.93 × 10−10m2 /s; C0 = 0.35 wt%; Cx = 0.11 wt%; t = 12 hr
Decarburization] An FCC iron-carbon alloy initially containing carbon with the concentration, C0, is exposed to an oxygen-rich and virtually carbon-free atmosphere. Under the given conditions, the carbon diffuses from the alloy and reacts at the surface with the oxygen in the atmosphere, meaning that the carbon concentration at the surface position is maintained essentially at 0 wt% C. The subproblems are independent. (1) Determine the diffusion coefficient at the temperature T given below. Use T = 1250 °C (2) When the value of D is given below, what position will the carbon concentration be Cx after a treatment for the time, t? Use D = 1.93 × 10−10m2 /s; C0 = 0.35 wt%; Cx = 0.11 wt%; t = 12 hr
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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[Decarburization] An FCC iron-carbon alloy initially containing carbon with the concentration, C0, is exposed to an
oxygen-rich and virtually carbon-free atmosphere. Under the given conditions, the carbon diffuses from the alloy and
reacts at the surface with the oxygen in the atmosphere, meaning that the carbon concentration at the surface position is maintained essentially at 0 wt% C. The subproblems are independent.
(1) Determine the diffusion coefficient at the temperature T given below.
Use T = 1250 °C
(2) When the value of D is given below, what position will the carbon concentration be Cx after a treatment for the
time, t?
Use D = 1.93 × 10−10m2 /s; C0 = 0.35 wt%; Cx = 0.11 wt%; t = 12 hr
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