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Question: a 0001 in bcc iron foil is used to separate...

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A 0.001 in. BCC iron foil is used to separate a high hydrogen content gas from a low hydrogen content gas at 650°C. 5 x10* H atoms/cm3 are in equilibrium on one side of the foil, and 2 x103 H atoms/cm3 are in equilibrium with the other side. Determine (a) the concentration gradient of hydrogen and (b) the flux of hydrogen through the foil. 3. A BCC iron structure is to be manufactured that will allow no more than 50 g of hydrogen 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 and 0.001 H atom per unit cell at the second surface, determine the minimum thickness of the iron. 4,

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