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The graph below shows the diffusion coefficient as a function of reciprocal temperature for several metals...
Below is shown a of the diffusion coefficient of gold in silver vs. reciprocal temperature. (Note...
Below is shown a of the diffusion coefficient of gold in silver vs. reciprocal temperature. (Note that the ordinate is a logarithmic scale.). Determine the values for the pre-exponential and for the activation energy for the gold in silver system.
Problem 8 A silicon wafer is doped by Phosphorous via Diffusion at 1090°c. TCC) 1200 1000...
Problem 8 A silicon wafer is doped by Phosphorous via Diffusion at 1090°c. TCC) 1200 1000 Gaussian function. The solid solubility of phosphorous is 10 cm and the measured junction depth is 1 um at a substrate concentration of 106 cm 3. Calculate the diffusion time and the total dopant in the diffused layer. Si Cu Au Slope for E,- 1 ev 2 eV 3 eV t ev 5 eV 10-12 Al In 0.6 0.7 1000T (K-)
A diffusion couple composed of two silver– gold alloys is formed; these alloys have compositions of...
A diffusion couple composed of
two silver– gold alloys is formed; these alloys have compositions
of 98 wt% Ag–2 wt% Au and 95 wt% Ag– 5 wt% Au. Determine the time
this diffusion couple must be heated at 750°C (1023 K) in order for
the composition to be 2.5 wt% Au at the 50 μm position into the 2
wt% Au side of the diffusion couple. Preexponential and activation
energy values for Au diffusion in Ag are 8.5 × 10−5...
can you answer these for me! I am struggling. EEN 211 Home work #2 Due Date:...
can
you answer these for me! I am struggling.
EEN 211 Home work #2 Due Date: 03/23/2020 1. The equilibrium fraction of lattice sites that are vacant in silver (Ag) at 700C is 2 x 10-6 Calculate the number of vacancies (per meter cubed) at 700 C. Assume a density of 10.35 g/cm for Ag 2. What is the composition, in atom percent of an alloy that consists of 92.5 wt% Ag and 7.5 wrCu? 3. Calculate the number of...
A copper wire 10 m long must experience a voltage drop of less than 1.0 V...
A copper wire 10 m long must experience a voltage drop of less than 1.0 V when a current of 3.0 A passes through it. Using the data in Table 12.1, compute the minimum diameter of the wire. Table 12.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Electrical Conductivity (22-m)!) Silver 6.8 * 107 Copper 6.0 x 107 Gold 4.3 x 107 Aluminum 3.8 x 107 Brass (70 Cu-30 Zn) 1.6 × 107 Iron 1.0 x 107...
An alumunium wire 20 m long must experience a voltage drop of less than 1.0 V...
An alumunium wire 20 m long must experience a voltage drop of less than 1.0 V when a current of 5.0 A passes through it. Using the data in Table 12.1, compute the minimum diameter of the wire Table 12.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Allovs Metal Silver Copper Gold Aluminum Electrical Conductivity () 6.8 x 10 6.0 x 10 4.3 x 10 .8 x 10 1.6 x 10 1.0 x 10 0.94 x 10 0.6 x...
Chapter 18, Problem 18.03 XIncorrect. A gold wire 4.0 mm in diameter is to offer a resistance of ...
Chapter 18, Problem 18.03 XIncorrect. A gold wire 4.0 mm in diameter is to offer a resistance of no more than 15 Ω. Using the data in Table 18.1, compute the maximum wire length Table 18.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Silver Copper Gold Aluminum Brass (70 Cu-30 Zn) Electrical Conductivity [(a-m ] 6.8 x 10 6.0 x 10 4.3 x 10 3.8 x 10 1.6 x 10 1.0 x 10 0.94 x 107 0.6...
Calculate the amount of heat in J required to increase the temperature of 25.0 grams of...
Calculate the amount of heat in J required to increase the temperature of 25.0 grams of water from 25. °C to 50.0 °C. ice Specific Heats of Common Substances at 25 °C and 1 bar Substance Symbol Specific Heat (J/g (state) °C) helium He(s) 5.193 water H2O(1) 4.184 ethanol C2H60(1) 2.376 H2O(s) 2.093 (at -10 °C) water vapor H2O(g) 1.864 nitrogen N2(8) 1.040 air 1.007 oxygen O2(8) 0.918 aluminum Al(s) 0.897 carbon CO2(8) 0.853 dioxide argon Ar(s) 0.522 iron Fe(s)...
Chapter 18, Problem 18.03 XIncorrect. A gold wire 4.0 mm in diameter is to offer a...
Chapter 18, Problem 18.03 XIncorrect. A gold wire 4.0 mm in diameter is to offer a resistance of no more than 15 Ω. Using the data in Table 18.1, compute the maximum wire length Table 18.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Silver Copper Gold Aluminum Brass (70 Cu-30 Zn) Electrical Conductivity [(a-m ] 6.8 x 10 6.0 x 10 4.3 x 10 3.8 x 10 1.6 x 10 1.0 x 10 0.94 x 107 0.6...
13.0 (50 pts) Consider the high temperature diffusion of Aluminum at 1368°C for 360 hours into...
13.0 (50 pts) Consider the high temperature diffusion of Aluminum at 1368°C for 360 hours into a semi-infinite solid cylinder of pure silicon having a radius R=520 E-6 m. Assume values of Do = 8.968 cm2/s, Q = 333.5 kJ/mole, R = 8.314 J/mole-K and a surface concentration 4E20 atoms/cm3. Determine the concentration at the ten (10) equally spaced distances from the surface listed below. Report concentrations in atom/cu.cm. _4E+20 Casurface a) b) c) d) e) f) g) h) i)...
Below is shown a of the diffusion coefficient of gold in silver vs. reciprocal temperature. (Note that the ordinate is a logarithmic scale.). Determine the values for the pre-exponential and for the activation energy for the gold in silver system.
Problem 8 A silicon wafer is doped by Phosphorous via Diffusion at 1090°c. TCC) 1200 1000 Gaussian function. The solid solubility of phosphorous is 10 cm and the measured junction depth is 1 um at a substrate concentration of 106 cm 3. Calculate the diffusion time and the total dopant in the diffused layer. Si Cu Au Slope for E,- 1 ev 2 eV 3 eV t ev 5 eV 10-12 Al In 0.6 0.7 1000T (K-)
A diffusion couple composed of
two silver– gold alloys is formed; these alloys have compositions
of 98 wt% Ag–2 wt% Au and 95 wt% Ag– 5 wt% Au. Determine the time
this diffusion couple must be heated at 750°C (1023 K) in order for
the composition to be 2.5 wt% Au at the 50 μm position into the 2
wt% Au side of the diffusion couple. Preexponential and activation
energy values for Au diffusion in Ag are 8.5 × 10−5...
can
you answer these for me! I am struggling.
EEN 211 Home work #2 Due Date: 03/23/2020 1. The equilibrium fraction of lattice sites that are vacant in silver (Ag) at 700C is 2 x 10-6 Calculate the number of vacancies (per meter cubed) at 700 C. Assume a density of 10.35 g/cm for Ag 2. What is the composition, in atom percent of an alloy that consists of 92.5 wt% Ag and 7.5 wrCu? 3. Calculate the number of...
A copper wire 10 m long must experience a voltage drop of less than 1.0 V when a current of 3.0 A passes through it. Using the data in Table 12.1, compute the minimum diameter of the wire. Table 12.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Electrical Conductivity (22-m)!) Silver 6.8 * 107 Copper 6.0 x 107 Gold 4.3 x 107 Aluminum 3.8 x 107 Brass (70 Cu-30 Zn) 1.6 × 107 Iron 1.0 x 107...
An alumunium wire 20 m long must experience a voltage drop of less than 1.0 V when a current of 5.0 A passes through it. Using the data in Table 12.1, compute the minimum diameter of the wire Table 12.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Allovs Metal Silver Copper Gold Aluminum Electrical Conductivity () 6.8 x 10 6.0 x 10 4.3 x 10 .8 x 10 1.6 x 10 1.0 x 10 0.94 x 10 0.6 x...
Chapter 18, Problem 18.03 XIncorrect. A gold wire 4.0 mm in diameter is to offer a resistance of no more than 15 Ω. Using the data in Table 18.1, compute the maximum wire length Table 18.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Silver Copper Gold Aluminum Brass (70 Cu-30 Zn) Electrical Conductivity [(a-m ] 6.8 x 10 6.0 x 10 4.3 x 10 3.8 x 10 1.6 x 10 1.0 x 10 0.94 x 107 0.6...
Calculate the amount of heat in J required to increase the temperature of 25.0 grams of water from 25. °C to 50.0 °C. ice Specific Heats of Common Substances at 25 °C and 1 bar Substance Symbol Specific Heat (J/g (state) °C) helium He(s) 5.193 water H2O(1) 4.184 ethanol C2H60(1) 2.376 H2O(s) 2.093 (at -10 °C) water vapor H2O(g) 1.864 nitrogen N2(8) 1.040 air 1.007 oxygen O2(8) 0.918 aluminum Al(s) 0.897 carbon CO2(8) 0.853 dioxide argon Ar(s) 0.522 iron Fe(s)...
Chapter 18, Problem 18.03 XIncorrect. A gold wire 4.0 mm in diameter is to offer a resistance of no more than 15 Ω. Using the data in Table 18.1, compute the maximum wire length Table 18.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Silver Copper Gold Aluminum Brass (70 Cu-30 Zn) Electrical Conductivity [(a-m ] 6.8 x 10 6.0 x 10 4.3 x 10 3.8 x 10 1.6 x 10 1.0 x 10 0.94 x 107 0.6...
13.0 (50 pts) Consider the high temperature diffusion of Aluminum at 1368°C for 360 hours into a semi-infinite solid cylinder of pure silicon having a radius R=520 E-6 m. Assume values of Do = 8.968 cm2/s, Q = 333.5 kJ/mole, R = 8.314 J/mole-K and a surface concentration 4E20 atoms/cm3. Determine the concentration at the ten (10) equally spaced distances from the surface listed below. Report concentrations in atom/cu.cm. _4E+20 Casurface a) b) c) d) e) f) g) h) i)...
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