An Aluminum-Copper alloy initially containing (0.4 wt% Cu) is placed and held in an atmosphere that gives a constant surface Aluminum concentration of (1.0 wt% ). If after (43 h) the concentration of copper is (0.55 wt%) at a position (4.0 mm) below the surface. What is the diffusion coefficient of copper in aluminum for the treatment conditions. erf(z) 0.70 0.6778 0.75 0.7112 0.80 0.7421 0.85 0.7707 0.90 0.7970

An Aluminum-Copper alloy initially containing (0.4 wt% Cu) is placed and held in an atmosphere that gives a constant surface Aluminum concentration of (1.0 wt% ). If after (43 h) the concentration of copper is (0.55 wt%) at a position (4.0 mm) below the surface. What is the diffusion coefficient of copper in aluminum for the treatment conditions. erf(z) 0.70 0.6778 0.75 0.7112 0.80 0.7421 0.85 0.7707 0.90 0.7970

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A thermal evaporator is used to deposit aluminum. The aluminum charge is maintained at a uniform temperature of 1100 o C. If the the vapor pressure of aluminum is about 1x10-3 torr at that temperature, calculate the evaporation rate of aluminum?
Find the diffusitivity of air in methane and the molecular diffusion of methane, if the tank filled with a mixture of methane and air at 102 kPa and 25 ⁰C is connected to another large tank filled with a different composition of methane and air also at 102 kPa and 25 ⁰C. The connection between the tanks is a tube with an inner diameter of 50 mm and length of 150 mm. The concentration of methane in one tank is 90% by mole and in the other, 5% by mole.
The diffusion coefficient of Ni in Cu at 1025 C is 10-9 cm2 s-1. How long does it take for the mean square root of the distance to be 1 cm?
4
The diffusivity of aluminum in a commercial aluminum alloy is 10-20 m2/s at 400°C. The activation energy for diffusion of Aluminum in this system is 195 kJ/mol. Calculate the diffusivity at 600°C
A thin plastic membrane is used to separate helium from a current.gaseous. Under steady-state conditions, a concentration of helium in the membrane is known to be 0.02 and 0.005 kmol/m³ on the inner and outer surfaces, respectively. If the membrane has a thickness of 1 mm and the coefficient ofbinary diffusion of helium to plastic is 10^(-9) m²/ s, what is the value of the flow diffusive?
What mass of NaCl must be dissolved in 65.0 g of water to lower the freezing point of water by 7.5°C? The freezing point depression constant (Kf) for water is 1.86°C/m. Assume van’t Hoff factor for NaCl is 1.87. (Molar mass of NaCl = 58.5 g)
Solve by hand please solve correctly please
Parvinbhai
The diffusion coefficients for species A in metal B are given at two temperatures: D (m²/s) 7.81 x 10-17 7.70x 10-16 i (b) Determine the value of Do. (a) Determine the value of the activation energy Qd (in J/mol). i T (°C) 1030 i 1260 J/mol m²/s (Use scientific notation.) (c) What is the magnitude of D at 1180°C? m²/s (Use scientific notation.)
At approximately what temperature (in Kelvin) would a specimen of an alloy have to be carburized for 2.0 h to produce the same diffusion result as at 760°C for 13 h? Assume that values for Do and Qd are 1.3 × 10-4 m²/s and 135 kJ/mol, respectively. T= i K
At approximately what temperature (in Kelvin) would a specimen of an alloy have to be carburized for 2.1 h to produce the same diffusion result as at 920°C for 14 h? Assume that values for Do and Q are 3.7 x 10 m/s and 156 kJ/mol, respectively. T- K