Question 2) a) Cite two diffusion mechanism in crystalline solids, and using schematic representation explain how these mechanisms function. (4pts) b) A sheet of steel 1.5mm thick has nitrogen atmospheres on both sides at 1200C and is permitted to achieve a steady-state diffusion condition. The diffusion coefficient for nitrogen in steel at this temperature is 61011m2/s, and the diffusion flux is found to be 1.V107kg/m2s. Also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4kg/m3. How far into the sheet from this high-pressure side will the concentration be 2.0kg/m3 ?, (8pts) ( V is the last digit your registration number) c) The diffusion coefficient of A in B is 5.C104m2/s at 600C, and 3.9103m2/s at 750C. Calculate the diffusion coefficient of A in B at 900C. (8pts) ( C is the 7th digit your registration number) Question 2) a) Cite two diffusion mechanism in crystalline solids, and using schematic representation explain how these mechanisms function. (4pts) b) A sheet of steel 1.5mm thick has nitrogen atmospheres on both sides at 1200C and is permitted to achieve a steady-state diffusion condition. The diffusion coefficient for nitrogen in steel at this temperature is 61011m2/s, and the diffusion flux is found to be 1.V107kg/m2s. Also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4kg/m3. How far into the sheet from this high-pressure side will the concentration be 2.0kg/m3 ?, (8pts) ( V is the last digit your registration number) c) The diffusion coefficient of A in B is 5.C104m2/s at 600C, and 3.9103m2/s at 750C. Calculate the diffusion coefficient of A in B at 900C. (8pts) ( C is the 7th digit your registration number)