Diffusion of carbon into the surface of BCC steel at 600oC for 10 hours results in a carbon concentration of 0.2wt% at a depth of 1.5 mm below the surface. At what depth will the same concentration be obtained if the diffusion time is increased to 20 hours, leaving the temperature at 600o

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 activation energy for the diffusion of atomic species A in metal B is 118 kJ/mol. Calculate the…

A: D1=Diffusion Coefficient At 1140=6.1×10-11 m2/sT1=Temperature=1140°C=1413.15 kT2=840°C=1113.15…

Q: Determine the carburizing time necessary to achieve a carbon concentration of 0.50 wt% at a position…

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

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Q: The preexponential and activation energy for the diffusion of chromium in nickel are 1.1 × 104 m2/s…

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Q: Determine the maximum allowable temperature that will produce a flux of less than 6x107 H atoms m2…

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Q: Given that a component is made of 0.1 wt.%C steel is carburized by introducing 1.0 wt.% carbon at…

A: D0</sub> = 0.2 cm2/sQd = 40,000 cal/molt = 1 hour = 3600 secx = 0.5 mm = 0.05 cmT = 980o C =…

Q: Rank the magnitudes of the diffusion coefficients from greatest to least for the following systems:…

A: Diffusion coefficient is the amount of particular element that diffuses across a unit area in 1 s…

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: büt4. The following figure shows a plot of the logarithm (to the base 10) of the diffusion…

A: Solution:- Write the equation for temperature dependence of the diffusion coefficient…

Q: A BCC iron alloy containing 0.05 wt% C is carburized at 1050°C such that the carbon concentration is…

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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: A practical example of steady-state diffusion is the purification of hydrogen gas where one side of…

A: Given data: Thickness of palladium sheet: x = 6 mm = 0.006 m Surface area of palladium sheet: A =…

Q: (Figure 1) shows two compartments separated by a semipermeable membrane that is permeable to the…

A: GivenC1=145 mMC2=50 mMT=20oC

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

A: Given Data: The diffusion constant at T1 = 1273 K is D1=9.4×10-16 m2/s The diffusion constant at…

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: The figure below shows five different steady-state concentration profiles from five separate tests,…

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Q: The activation energy for the diffusion of atomic species A in metal B is 114 kJ/mol. Calculate the…

A: D1=Diffusion Coefficient At 1140=76.7×10-12 m2/sT1=Temperature=1170°C=1443KT2=891°C=1164 KE=The…

Q: Question 1 Helium gas is contained in a cylinder by a gas-tight piston which can be assumed to move…

A: The gas used is helium and given that

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: Carbon is being diffused into chromium at 1400 K (1127°C). The diffusion coefficient at this…

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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

Q: Gaseous hydrogen at a constant pressure is to flow within the inside of a thin-walled cylindrical…

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Q: Compare the diffusion coefficients (in cm²/s) of nitrogen in BCC and FCC iron at the allotropic…

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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.