How does temperature affect the significance of grain boundary diffusion for changing the composition of a...
How does temperature affect the significance of grain boundary diffusion for changing the composition of a solid?
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How does temperature affect the significance of grain boundary
diffusion for changing the composition of a...
Answer the following questions related to diffusion. Quantitatively describe the boundary conditions for the well-known assumption...
Answer the following questions related to diffusion. Quantitatively describe the boundary conditions for the well-known assumption of a semi-infinite solid. Why is Qd for diffusion of Fe into gamma-iron greater than Qd for diffusion of C into gamma -iron? If the temperature was increased to 1100 degree C, how would you expect the carburizing time to change? What accounts for this change at the atomic level and how does it affect D, Do, and Qd?
How does changing the mean affect a normal distribution?
How does changing the mean affect a normal distribution? How does changing the standard deviation affect a normal distribution?
How does grain angularity and grain size distribution affect a soil's permeability? (Assume the average grain...
How does grain angularity and grain size distribution affect a soil's permeability? (Assume the average grain size corresponds to a medium sand) Angular grains in a well graded sand result in greater permeability than rounded grains in a poorly graded sand The angularity of the grains has no effect on the permeability of a soil The grain size distribution of a soil has no effect on its permeability Angular grains in a well graded sand result in lower permeability than...
In PCR, how does length/composition of primers affect annealing?
In PCR, how does length/composition of primers affect annealing?
How does the difference in solute concentration across a membrane affect the rate of diffusion?
How does the difference in solute concentration across a membrane affect the rate of diffusion?
2. What is the carbon content of 1020 steel? How does changing the carbon content affect...
2. What is the carbon content of 1020 steel? How does changing the carbon content affect the properties of steel? To make a material such as steel more ductile what changes can be made to its chemical composition? (15 points) 3. What are several common point defects in metals, list 2 and provide a brief description of them? Specific to steel what is the main type of point defect and why is it important to the behavior of steel? (15...
1. WHICH ANGLE PRODUCES THE MAXIMUM HORIZONTAL DISTANCE? 2. HOW DOES CHANGING THE MASS AFFECT THE...
1. WHICH ANGLE PRODUCES THE MAXIMUM HORIZONTAL DISTANCE? 2. HOW DOES CHANGING THE MASS AFFECT THE MOTION OF A PROJECTILE? 3. WHAT IS THE EFFECT OF AIR RESISTANCE? 4. HOW DOES CHANGING THE INITIAL SPEED AFFECT THE MOTION OF A PROJECTILE?
13. Describe how the following processes are affected by temperature and time, and how diffusion plays a role. Is d...
13. Describe how the following processes are affected by temperature and time, and how diffusion plays a role. Is diffusion a result of concentration gradients in each case? If not tell what is the driving force for atom diffusion with a net flux in one direction (versus random diffusion). a. Sintering refractory metals or ceramics b. Creep of metals or ceramics c. Recharging a battery d. Operation of a fuel cell to produce electricity e. Doping regions of a Si...
An ingot of Al-5% Cu is directionally solidified. Assume that there is no diffusion in the...
An ingot of Al-5% Cu is directionally solidified. Assume that there is no diffusion in the solid and that there is perfect mixing in the liquid. Pure aluminum melts at 660°C. At the eutectic temperature of 548°C, the liquid composition is 33.2% Cu and the solid composition is 5.35% Cu. Assume that the liquidus and solidus are straight lines. Calculate the composition of the liquid when the solidification is 40% complete. **************use Scheil equation to solve************* What is the average...
A copper-nickel alloy of composition (40% Ni-60% Cu) is slowly heated from a temperature of 1200°C: 1. a) At what temperature does the first liquid phase form? b) What is the composition of this liq...
A copper-nickel alloy of composition (40% Ni-60% Cu) is slowly heated from a temperature of 1200°C: 1. a) At what temperature does the first liquid phase form? b) What is the composition of this liquid phase? c) At what temperature does complete melting of the alloy occur? d) What is the composition of the last solid remaining prior to complete melting? Composition (at% N) 100 0 1600 2800 1500 1453°C Liquid 2600 Soldus line Liquidus line 1300 - 2200 120아ㅡㅡㅡㅡㅡ...
Answer the following questions related to diffusion. Quantitatively describe the boundary conditions for the well-known assumption of a semi-infinite solid. Why is Qd for diffusion of Fe into gamma-iron greater than Qd for diffusion of C into gamma -iron? If the temperature was increased to 1100 degree C, how would you expect the carburizing time to change? What accounts for this change at the atomic level and how does it affect D, Do, and Qd?
How does grain angularity and grain size distribution affect a soil's permeability? (Assume the average grain size corresponds to a medium sand) Angular grains in a well graded sand result in greater permeability than rounded grains in a poorly graded sand The angularity of the grains has no effect on the permeability of a soil The grain size distribution of a soil has no effect on its permeability Angular grains in a well graded sand result in lower permeability than...
13. Describe how the following processes are affected by temperature and time, and how diffusion plays a role. Is diffusion a result of concentration gradients in each case? If not tell what is the driving force for atom diffusion with a net flux in one direction (versus random diffusion). a. Sintering refractory metals or ceramics b. Creep of metals or ceramics c. Recharging a battery d. Operation of a fuel cell to produce electricity e. Doping regions of a Si...
A copper-nickel alloy of composition (40% Ni-60% Cu) is slowly heated from a temperature of 1200°C: 1. a) At what temperature does the first liquid phase form? b) What is the composition of this liquid phase? c) At what temperature does complete melting of the alloy occur? d) What is the composition of the last solid remaining prior to complete melting? Composition (at% N) 100 0 1600 2800 1500 1453°C Liquid 2600 Soldus line Liquidus line 1300 - 2200 120아ㅡㅡㅡㅡㅡ...
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