The preexponential and activation energy for the diffusion of chromium in nickel are 1.1 × 104 m2/s and 272,000 J/mol, respectively. At what temperature (in "C) will the diffusion coefficient have a value of 1.1 x 10-14 m²/s? i °C

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 diffusion coefficients for iron in nickel are given at two temperatures: T(K) 1273 1473 D (m²/s)…

A: The diffusion constant at T1 = 1273 K is The diffusion constant at The value of the gas constant is…

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

A: To determine the concentration of carbon, given data aretemperature, time taken depth of the surface…

Q: Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the surface…

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Q: t approximately what temperature (in Kelvin) would a specimen of an alloy have to be carburized for…

A: Given data as per question T1=820°C=820+273=1093 Kτ1=12 hDo=1.6×10-6 m2/sQd=159 kJ/molAndτ2=1.1 h

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)

A: Given: t=11 mm C1= 0.85 kgC/m3 C2=0.42 kgC/m3 Activation energy =80000 J/mol To determine: The…

Q: 14.43 Steel is carburized in a high-temperature process that depends on the transfer of carbon by…

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Q: Beginning with a differential control volume, derive the diffusion equation, on a molar basis, for…

A: differential equation for species conservation in cartesian coordinate is used to arrive the…

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…

Q: The purification of hydrogen gas is possible by diffusion through a thin palladium sheet. Calculate…

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Q: The diffusion coefficient for carbon in BCC iron at 400C and 900C is given as 3.80x10-13 and…

A: First with the given data we will find the unknowns of the diffusion equation and then calculate the…

Q: The diffusion coefficients for species A in metal B are given at two temperatures: D (m²/s) 8.54 x…

A: The given question is solved using the ficks law of diffusion.

Q: You are asked to determine the concentration of a diffusing gas at a given depth on a metal surface…

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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: At approximately what temperature (in Kelvin) would a specimen of an alloy have to be carburized for…

A: Given Data: The value of D0=1.4×10-4 m2/s. The value of Qd=147 kJ/mol. The time is t1=2.5 h and…

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%…

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Q: .Nitrogen from a gaseous phase is to be diffused into pure iron at 669 °C. If the surface…

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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: Problem 1 A sheet of BCC iron 1 mm thick was exposed to a carburizing gas atmosphere on one side and…

A: On one surface,Cc = 0.012 wt% ; Cfe = 100 - 0.012 = 99.988 wt%Then, concentration of Carbon in kg…

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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Q: A thermal evaporator is used to deposit aluminum. The aluminum charge is maintained at a uniform…

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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.