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
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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•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.
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The activation energy for the diffusion of atomic species A in metal B is 114 kJ/mol. Calculate the diffusion coefficient at 891°C, given that the value of D at 1170°C is 76.7 × 10^-12 m2/s.
Gold forms a substitutional solid solution with silver. Compute the number of gold atoms per cubic centimetre for a silver-gold alloy that contains 10 wt% Au and 90wt% Ag. The densities of pure gold and silver are 19.32 and 10.49 g/cm3 respectively.

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