Solve this problem and show all of the work 5-17 A BCC iron structure is to be manufactured that will allow no more than 50 g ofhydrogen to be lost per year through each square centimeter of the iron at 400 °C.If the concentration of hydrogen at one surface is 0.05 H atom per unit cell and0.001 H atom per unit cell at the second surface, determine the minimumthickness of the iron.

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Answered: 5-17 A BCC iron structure is to be…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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The vacancy concentration for a metal A with an activation energy Q is 2x10-5. Calculate the vacancy concentration for a second metal B with activation energy 1.2Q. (This question has only one correct answer) а. 2.3 x 10-6 b. 4.3 x 10-5 O c. 1.3 x 10-6 d. 3.3 x 10-4
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Calculate the concentration of monovacancies in gold at 1,000 K, knowingthat Hf = 1.4 × 10−19 J. If the gold is suddenly quenched to ambienttemperature, what will be the excess vacancy concentration?
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Question 2: (Problem 2.6) An optical fiber for telecommunication is made of SIO2 glass (density 2.20 Mg/m) How many Si atoms and how many O atoms are present per millimeter of length (L 1 mm) of a fiber 10 um in diameter (d-10 mm)? Given M(Si)-28.09 g mole M(OF16gmole Avogadro's Number AN=0.6203 (10) Solution.
•You are case-hardening a tool made of BCC (α) iron in the presence of a carbonaceous material. A heat treatment at 600 oC for 100 minutes results in a carbon concentration of 0.75 wt% at a position 0.5mm below the surface. How long would it take to obtain the same concentration at the same position if the heat treatment were conducted at 900 oC? x12/D1t1= x22/D2t2 Arrhenius equation: D=D0e^(〖-Qd〗∕RT) Qd = Activation energy of diffusion D0 = Pre-exponential diffusion factor R = gas constant = 8.314 J/(mol*K) Use the Arrhenius equation to calculate D1 and D2. Calculate the time to satisfy the problem statement.
Carbon idallowed to diffuse through a steel plate 23.1 mm thick. The concentrations of carbon at the two faces are0.71 gnand 01g whhare mataontant It the pre exponential and activation energy are 0.0000006 ms and 75453 Mmol respectively compute the temperature at which the diffution fa in 52 10 P Give your answer in degrees.Celsius to 1 decimal place
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A 0.015M solution of hydrogen cyanate ,HOCN has a pH of 2.67
Compare the diffusion coefficients (in cm²/s) of nitrogen in BCC and FCC iron at the allotropic transformation temperature of 912°C. Decc -153606 X Your response differs from the correct answer by more than 10%. Double check your calculations, cm²/s -1976-7 Dicc x Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. cm2/s
A mechanism for hardening steel is called carburization. To achieve this process, the piece of steel is exposed to an atmosphere rich in hydrocarbon such as methane (CH4). Consider a steel with a carbide concentration of 0.25wt%, which must be treated at 950˚C. If the carbon concentration at the surface is suddenly increased to 1.20wt%, how long does it take for a penetration of 0.5mm from the surface to reach a concentration of 0.80wt%? . The diffusion coefficient for carbon in iron at this temperature is 1.6 x 10-11 m2s-1. Assume that the piece of steel is semi-finite. Use the table below.
This is material science question Diffusion Calculation

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