Q1. Zone refining is used in semiconductor industry to obtain high purity materials by remelting thin zones of an initial bar. What is the purity of the semiconductor bar after remelting if the initial bar has 0.1 % impurity and k = 0.12. (5 points) Zone

EMS 164- Homework 6 Solutions
Problems 3.12, 3.13 and 3.20 in textbook. Q1. Assume a thin Mg layer has to be deposited on an Al substrate. Is it possible to develop a coherent interface? Explain. A coherent interface arises when two crystals match perfect

Homework 5 Solutions- EMS 164
Problems 3.1, 3.2, 3. 4 (only Part a) 3. 5 and 3.10 in textbook. 1. How much will copper grain growth rate change when temperature drops from 0.8 T_m to 0.5 T_m (delta G_a = 305 kJ/mol; T_m = 1356 K)? General Arrhenius equati

EMS 164- Solutions for Homework 4 Problems 2.3 and 2.7 in textbook 1.Dendritic segregation, or coring, is very common in alloy castings. Segregation can be removed by a homogenizing anneal. The dendritic arm spacing is assumed to equal 2l (sinusiodal wave

EMS 164- Homework 3 Solutions 1. In a graphical representation show that diffusion occurs down the chemical potential gradient in a diffusion couple made of two solid solutions with compositions within a miscibility gap (class problem). (Not graded) Figur

EMS 164- Homework 2 Solutions 1. Complete the construction of the phase diagram from the following information (started in our discussion on April 9): (10 points) a) Component A melts at 1600 C and B at 1400 C b) An intermediate compound (50A-50B) melts c

EMS 164 - Homework 1 Solutions 1. Define in your own words the following terms: enthalpy, entropy, free energy, eutectic. Give examples of systems composed of one phase and two phases. For the latter, indicate the two phases (hint: you may consider some m