MSE220 Homework 4
Due in class on 9/30
1. Carbon diffuses in iron via an interstitial mechanism for BCC iron from one
tetrahedral site to an adjacent one. In Section 4.3 (Figure 4.3b) we note that a general
11
set of point coordinates for this site are 12
MSE220 Homework 4 Solutions
Problem 1 Solution
1. Carbon diffuses in iron via an interstitial mechanism for BCC iron from one
tetrahedral site to an adjacent one. In Section 4.3 (Figure 4.3b) we note that a
11
general set of point coordinates for this sit
MSE220 Homework 12
Optional (and Recommended) Review
1. (a) Compute the resistance of a copper wire 10 mm in diameter and 15 m long.
(b) What would be the current flow if the potential drop across the ends of the wire is
0.08 V?
(c) What is the current de
MSE220 Homework 11 Solutions
1. Molecular weight data for some polymer are tabulated here. Compute (a) the number
average molecular weight, and (b) the weight-average molecular weight. (c) If it is
known that this materials degree of polymerization is 136
MSE220 Homework 10
Due in class on 11/24
1. The metal Szewczykium (symbol Sz), always found in the +2 oxidation state, has a
Standard Electrode Potential of -0.136 V. A Szewczykium electrode and a lead electrode
are used in an electrochemical cell like th
MSE220 Homework 8
Due: 11/6/14
1. For some transformation with kinetics that obey the Avrami Equation, the parameter n
is known to have a value of 1.9. If after 225 s, the reaction is 50% complete, how long
(total time) will it take for the transformation
MSE220 Homework 9 Solutions
1. The alkali metal Cbeium (symbol Cb) and the halogen Meamine (symbol Me) react to
form the ionic compound Cbeium Meamide (symbol CbMe). The radius of Cb+ is 200
pm, and the radius of Me- is 300 pm. What crystal structure do y
Thermal Properties
Please read Chapter 19 in our text book
1
Heat / Temperature
Heat and temperature are two different things
Example: Beaker w/ water + ice in it, add heat
Temperature? Heat?
Example: Metal rod, T1 & T2 , heat flows
T2
T1
Heat flows i
MSE220 Homework 10 Solutions
1. The metal Szewczykium (symbol Sz), always found in the +2 oxidation state, has a
Standard Electrode Potential of -0.136 V. A Szewczykium electrode and a lead electrode
are used in an electrochemical cell like the one depict
MSE220 Homework 9
Due in class on 11/11
1. The alkali metal Cbeium (symbol Cb) and the halogen Meamine (symbol Me) react to
form the ionic compound Cbeium Meamide (symbol CbMe). The radius of Cb+ is 200
pm, and the radius of Me- is 300 pm. What crystal st
MSE220 Homework 7 Solutions
1. Given here are the solidus and liquidus temperatures for the Seasium-Whartogen
system. Construct the phase diagram for this system and label each region.
1100
Liquid
Temperature (C)
1050
1000
+L
+L
950
900
850
0
20
40
60
80
MSE220 Homework 12 Solutions
1. (a) Compute the resistance of a copper wire 10 mm in diameter and 15 m long.
(b) What would be the current flow if the potential drop across the ends of the wire is
0.08 V?
(c) What is the current density?
(d) What is the m
MSE220 - Syllabus
The course will address fundamental aspects of materials science and engineering with a goal
of building the foundations for all other courses related to materials. The course will cover
atomic bonding, crystal structure and symmetry, gl
MSE220 Homework 11
Due in class on 12/04
1. Molecular weight data for some polymer are tabulated here. Compute (a) the number
average molecular weight, and (b) the weight-average molecular weight. (c) If it is
known that this materials degree of polymeriz
MSE 220 Exam III
10 December 2013
NAME: _
Please read and sign the following (your exam will not be graded without your signature):
I have neither given nor received aid on this exam.
Signature: _
284
7.3
CHAPTER 7. POWER SERIES METHODS
Singular points and the method of Frobenius
Note: 1 or 1.5 lectures , 8.4 and 8.5 in [EP], 5.4 5.7 in [BD]
While behaviour of ODEs at singular points is more complicated, certain singular points are not
especially d
Polymers
Please read Chapters 14 & 15 in our text book
Lecture 1: Brief Introduction
CHEM 378: Intro to Polymer Science
What
What is a polymer? is a Polymer?
A large molecule (a macromolecule) constructed from many small
molecules (monomers) covalently b
MSE220 Midterm 1 Solutions
1. Considering interatomic potentials (5 pts each section):
a. Why is it unusual for a material to have BOTH a high Young's modulus and a
high coefficient of thermal expansion?
A high Young's modulus implies the potential is ver
6. h)
The amount of total that forms is found by using the lever rule in the + region. The
compositions (in atomic percent B) of the phases are C 27 and C 50 respectively,
and the total composition of the sample is C s 35 . Therefore, the phase fraction o
MSE220 Homework 8 Solutions
1. For some transformation with kinetics that obey the Avrami Equation, the parameter n
is known to have a value of 1.9. If after 225 s, the reaction is 50% complete, how long
(total time) will it take for the transformation to
MSE220 Homework 7
Due in class on 10/28
1. Given here are the solidus and liquidus temperatures for the Seasium-Whartogen
system. Label the phases in each region.
1100
Temperature (C)
1050
1000
950
900
850
0
20
40
60
80
100
Composition % Seasium
2. A hypo
MSE220 Homework 1 Solutions
1. The net potential energy between two adjacent ions, E N , may be represented by the
A B
equation E N n . Calculate the equilibrium bond energy E 0 in terms of
r r
parameters A, B and n. (Hint: first find the value of r where
Defects in Solids
Please read Callister and Rethwisch,
Materials Science and Engineering, Chapter 4
Subject of
This and next lecture
Third homework assignment
Next class:
MONDAY 6 PM, meet in 112B LRSM
Dinner provided
1
Defects in Solids
Crystals ar
Ceramics
Please read Chapters 12 & 13 in our text book
First, some reminders
Atomic Bonding in Ceramics
Bonding:
- Can be ionic and/or covalent in character
- % ionic character increases with difference in
electronegativity of atoms
Degree of ionic ch
Electrical Properties
Please read Chapters 18 in our text book
1
Electrical Basics
Ohm's Law:
V=IR
voltage drop (volts = J/C)
resistance (Ohms)
current (amps = C/s)
C = Coulomb
Resistivity, :
- a material property that is independent of sample size and
Crystal Structure
Please read Callister and Rethwisch,
Materials Science and Engineering, Chapter 3
Subject of
This and next lecture
Second homework assignment
1
Energy and Packing
Low density, random packing
Energy
typical neighbor
bond length
typic