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

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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: If we have a system diffusing with a diffusion flux that is constant over time, [a] What do we call…

A: If we have a system diffusing with a diffusion flux that is constant over time, [a] What do we call…

Q: A membrane is to be manufactured to the following specifications. At 700°C the leak rate of hydrogen…

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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: The [H+] vary over a range of a factor of 5 from B-1 to B-5. The concentrations of [MY-] vary from…

A: Given:

Q: Q6: The diffusion coefficients for carbon in nickel are given at two temperatures, as follows: T(°C)…

A: Given, T1 = 600 °C = 873 KD1 = 5.5 × 10-14 m2/sT2 = 700 °C = 973 KD2 = 3.9 × 10-13 m2/s

Q: Consider a sheet of Iron which is maintained in an atmosphere filled with nitrogen and is permitted…

A: Given Datathickness of sheet=6.5mmDiffusion coefficient of N2  (D)=1.9×10-11m2/s {at 675°C}Diffusion…

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 flat plug 30 mm thick having an area of 6×10-3 m2 is used to close an opening in a container. The…

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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: Caldie steel will be nitrided at a temperature of 520°C. By using Table 1, determine the nitrogen…

A: Diffusion is the movement of molecules in the presence of a concentration gradient. The molecules…

Q: For a steel alloy it has been determined that a carburizing heat treatment of 11.3 h duration will…

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Q: Mechanical Engineering At approximately what temperature (in Kelvin) would a specimen of an alloy…

A: Answer: The temperature at which a specimen of an alloy to be carburized for 1.3 hr: T = 1180.877 K

Q: One method of fabricating complex aerospace components is diffusion bonding. We wish to join a…

A: In the given pproblem,A Ni sheet and a FCC iron is to be joint.

Q: Calculate the value of the diffusion coefficient D (in m2/s) at 750°C for the diffusion of some…

A: Given D = 7.8 x 10-11 m2/s           Q = 118 kJ/mol  , T = 1140°c = 1413 k           R = 8.34…

Q: A 0.001 in. BCC iron foil is used to separate a high hydrogen gas from a low hydrogen gas at 650 °C.…

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Q: An iron-carbon alloy initially containing 0.240 wt% C is exposed to an oxygen-rich and virtually…

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Q: 34) Hydrogen is allowed to diffuse through a palladium plate that is 0.015m thick at 500°C. The…

A: given data thickness of the plate ∆x = 0.015mconcentration of carbon at both side are 0.65 and 0.30…

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

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

A: From the first given data:

Q: Using the Tabulation of Diffusion Data, answer the following: (a) Calculate the diffusion…

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Q: The steady-state diffusion flux through a metal plate is 7.8x10* kg/m².s at a temperature of 1200…

A: Write the expression of steady diffusion fluxJ=-D∆C∆xAnd we know that D=Do exp-QdRT

Q: Calculate the value of the diffusion coefficient D (in m^2/s) at 694°C for the diffusion of some…

A: Write the value of D0.   D0=5.6×10-5 m2/s   Write the value of Qd.   Qd=177 kJ/mol=177 kJ/mol×1000…

Q: A l-mm sheet of FCC iron is used to contain nitrogen in a heat exchanger at 1200°C. The…

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Q: Please kindly help. I will give a like. Thank you! a. Describe the S-curve model of diffusion on…

A: Rogers diffusion of innovation provides a heuristic framework for analyzing the diffusion of…

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

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Q: arbon is allowed to diffuse through a steel plate 15 mm thick, The concentration of carbon at the…

A: a) Given Data: steel Plate thickness = 15 mm = 15  Carbon Concentrations = 0.65 Kg c/m3 and 0.30 kg…

Q: You want to carburize a steel drill bit in the presence of methane. The drill bit initially has a…

A: Given data as per question  Initially carbon concentration = 0.25 wt%  Temperature for heat treated…

Q: After entering Cs, C0 and Cx into the LHS of Fick's second law equation, what does erf(z) equal to?…

A: The value of z is written as, Then, Non-steady state diffusion equation, Substitute the given…

Q: I am unsure which R gas constant units to use. I need to convert the (dy/d(ln(C)) units:…

A: Solution:

Q: An FCC iron-carbon alloy initially containing 0.10 wt% C is carburized at an elevated temperature…

A: Find the error function using Fick’s second law.

Q: Calculate the partial pressure and gas-phase concentration (in ppm) of i-pentane in air when air at…

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Q: An FCC iron–carbon alloy initially containing 0.25 wt% C is carburized at an elevated temperature…

A: Given X = 5 × 10-3 mm t = 55 h Co = 0.25 Cx = 0.35 Cs = 1 To find Treatment temperature

Q: Diffusion of carbon into BCC iron for 12 hours at a temperature of 500 °C results in a carbon…

A: Given: Carbon concentration at temperature 500 °C for 12 hours is  0.2 wt% at depth of 2 mm.

Q: Q1: A): Oxygen (A) is diffusing through nondiffusing carbon monoxide(B).The total pressure is 1*105…

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Q: If the diffusion coefficient for carbon into FCC Iron at a given temperature T is equal to 1.25 x…

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Q: What mass of NaCl must be dissolved in 65.0 g of water to lower the freezing point of water by…

A: ΔTf=iKfm Here, ΔTf​= lowering in freezing point of water =7.500C i= Van't Hoff factor =1.87…

Q: Consider a diffusion couple setup between pure tungsten and a tungsten alloy containing 1 at%…

A: Diffusion is carried out by three mechanism 1) Self Diffusion it means that random movement of atom…

Q: surface hardening. In the steel available at the lab, 0.15%C plain carbon steel, 0.25% and mariging…

A: Ductile irons are austempered to create a special material with exceptional qualities of high…

Q: Consider a sheet of Iron which is maintained in an atmosphere filled with nitrogen and is permitted…

A: Write the given information. Draw the C-x diagram of Fick’s first law of diffusion.

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.