The diffusion coefficient for carbon in BCC iron at 400C and 900C is given as 3.80x10-13 and 1.70x-10m2/s respectively.  Determine the temperature (in degrees C) at which a specimen of BCC iron has to be carburized for 150 minutes to produce the same diffusion result as at 900C for one hour.

Q: Carbon is allowed to diffuse through a steel plate 11 mm thick. The concentrations of carbon at the…

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Q: the sample for 10 hours at 930°C to achieve 0.4% carbon, 1cm from the surface. To Consider the…

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Q: At what temperature (in Kelvin) will the diffusion coefficient for the diffusion of species A in…

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Q: ,compute the temperature (in K)

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Q: 9. In the figure below the temperature dependence of diffusivity of Carbon and Aluminum in iron and…

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Q: The surface of a solid sphere is covered by a monolayer of receptors for a ligand. When the ligands…

A: Givendiffusion coefficient=4.8×10-9m2/sSphere is constant of=1.2nMsphere radius=2.8μmConcentration…

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Q: Calculate the diffusion constant,

A: GIVEN for the process at a diffusion temperature of T=1150 ⁰C D0 = 5.5 *10-5 m2/s;  Qd = 148,000…

Q: The surface of a solid sphere is covered by a monolayer of receptors for a ligand. When the ligands…

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Q: hat the value of D at 1150°C is 6.5 × 10-12 m²/s. i m²/s

A: Given: Activation Energy E=103 kJ/mol Diffusion coefficient at T=1150oC; D=6.5×10-12 m2/s To find:…

Q: What temperature is required to obtain 0.4%C at a distance of 0.3 mm beneath the surface of a 0.22%…

A: Data Provided

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Q: Boundary conditions: x=0 Cx= Co = 4.8 M x=L Cx= CL = 2.9 M Using Fick's law, find the steady state…

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Q: Aluminum atoms are to be diffused into a silicon wafer using both predeposition and drive-in heat…

A: CB=3.5×1019…

Q: A diffusion couple of two metals, A and B, was fashioned as shown: Diffusion of A atoms K A-B alloy…

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Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.