University of Califo
MSE 104, Winter 2013, Lecture 2 (Lan) Name:
Quiz No. 2 Version 2
Show all work and units to receive full credit.
Check that all parts are answered.
IL.
I}.-
m
5 (24 pts)
1. Short Answer Multiple Choice (20 pts)
a) To

MAE107 Homework #7 Solution
Prof. MCloskey
Problem 1
1. The Fourier transform does not exist. The Laplace transform exists and is 1/s with ROC
Re(s) > 0.
2. The Fourier transform exists because the exponential decays to zero as time runs backwards.
Just a

10/26/2012
Structure and Bonding
Ceramics
Atomic bonding can be ionic or covalent, most have a
combination of the 2.
ISSUES TO ADDRESS.
Most ceramics have both a metallic element and a nonmetallic one.
Structures of ceramic materials:
How do they diffe

MSE 104 HW #1
Oct.10 th.2012 Oct.17th. 2012
3.5 Show that the atomic packing factor for BCC is 0.68.
3.8 Calculate the radius of an iridium atom, given that Ir has an FCC crystal structure, a density of 22.4
g/cm3, and an atomic weight of 192.2 g/mol.
3.3

Processing sequence
o Crystal growth using Czochralski
method
o Slicing ingots to wafers
o Deposition of dopants and
interconnects to form junctions
Photolithography
UV radiation
Diffusion or ion implantation
o Sawing wafers to individual chips
o Mount

Electronic Materials
1. Electrical Properties
a. Basic Relations
b. Microscopic Behavior
d. Atomistic Behavior
e. Resistivity of Metals
1. Electrical Properties
a. Basic relations
Ao
e-
(cross
sect.
area)
2. Semiconductors
a. Intrinsic
b. Extrinsic n-type

MSE 104 HW #1
Oct.10 th.2012 Oct.17th. 2012
3.5 Show that the atomic packing factor for BCC is 0.68.
Solution
The atomic packing factor is defined as the ratio of sphere volume to the total unit cell volume, or
VS
VC
APF =
Since there are two spheres asso

10/2/2012
Imperfections in Solids
There is no such thing as a perfect crystal.
What are these imperfections?
Why are they important?
Types of Imperfections
Vacancy atoms
Interstitial atoms
Substitutional atoms
Point defects (0 dimensional)
Dislocati

10/26/2012
Structure and Bonding
Ceramics
Atomic bonding can be ionic or covalent, most have a
combination of the 2.
ISSUES TO ADDRESS.
Most ceramics have both a metallic element and a nonmetallic one.
Structures of ceramic materials:
How do they diffe

MSE 104 HW #2
Oct.24 th.2012 Oct.31st. 2012
8.6 An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture
toughness of 35 MPa
(31.9 ksi
). It has been determined that fracture results at a stress of 250
MPa (36,250 psi) w

MSE 104 Fall 2015
Homework # 4
Due, October 28, 2015 (in class)
Problems from McAllister 9th Edition: 8.6, 8.10, 8.40, 9.15, 9.18, 9.36, 9.42 and CES problem
8.6 An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture t

MSE 104 Fall 2015
Homework #3
Due, October 21, 2015 (In Class)
Problem from McAllister 9th Edition:
6.7, 6.20, 6.21, 6.24, 6.30, 6.48, 6.49, 6.53, 7.23 and CES problem
6.7 For a brass alloy, the stress at which plastic deformation begins is 345 MPa (50,00

MSE 104 Fall 2015
Homework #1 Solutions
Due: October 7, 2015 (In Class)
Problems from McAllister 9th Edition:
2.27, 3.14 (Al, W only are required- Ni, Mg are optional), 3.18, 3.33, 3.36, 3.46, 3.54, 3.61
2.27 What type(s) of bonding would be expected for

MSE 104 - Science of Engineering Materials
FALL 2013
Lecture: 2760 Boelter Hall
Recitation: 5419 Boelter Hall
TENTATIVE
Office Hours:
2121-E Eng V Mon 1-2 pm, Tues 1-2 pm
2121-L Eng V Mon 3-4 pm, Tues 10-11 am and by appt
Reading Assignment
Lecture 1: MW

ElectronicStructure
Electronshavewavelikeandparticulateproperties.
This means that electrons are in orbitals defined by a
Thismeansthatelectronsareinorbitals definedbya
probability.
Eachorbitalatdiscreteenergyleveldeterminedby
quantumnumbers.
Quantum#

MSE 104 HW #3 Solutions
18.12 (a) Calculate the number of free electrons per cubic meter for gold assuming that there are 1.5 free
electrons per gold atom. The electrical conductivity and density for Au are 4.3 107 (-m)-1 and 19.32
g/cm3, respectively. (b

MSE 104 HW #4
Nov 28 Dec 5, 2012
14.17 Calculate the number-average molecular weight of a random nitrile rubber [poly(acrylonitrilebutadiene) copolymer] in which the fraction of butadiene repeat units is 0.30; assume that this
concentration corresponds to

14.17 Calculate the number-average molecular weight of a random nitrile rubber [poly(acrylonitrile -butadiene)
copolymer] in which the fraction of butadiene repeat units is 0.30; assume that this concentration corresponds to a
degree of polymerization of

10/8/2012
Engineering Stress and Strain
Chapter 6-8:
Mechanical Properties
Tensile stress, :
3 principal modes of applying load
F
Tensile strain:
Ft
Materials behaviours under load/stress
/2
Area, A
L /2
Ft
Compression
Shear
Tension
Lo
wo
F
F
Elastic

MSE 104 HW #3
Nov.14th 2012 Nov. 21th 2012
(HW #3 is due by Nov. 21th 5pm no late homework will be accepted!)
18.12 (a) Calculate the number of free electrons per cubic meter for gold assuming that there are 1.5 free
electrons per gold atom. The electrica

MSE 104 Fall 2015
Homework #2
Due: October 14, 2015 (In Class)
Problems from McAllister 9th Edition:
4.5, 4.39, 5.3, 5.13, 5.16, 5.27, 5.41 and CES problem
4.5 Calculate the energy for vacancy formation in nickel (Ni), given that the equilibrium number of

IMPERFECTIONS IN SOLIDS
ISSUES TO ADDRESS.
What types of defects arise in solids?
Can the number and type of defects be varied
and controlled?
How do defects affect material properties?
Are defects undesirable?
41
Imperfections in Solids
Solidificati

Phase Diagrams
ISSUES TO ADDRESS.
When we combine two elements.
what equilibrium state do we get?
In particular, if we specify.
-a composition (e.g., wt% Cu - wt% Ni), and
-a temperature (T )
then.
How many phases do we get?
What is the composition of e

Mechanical Properties
ISSUES TO ADDRESS.
Stress and Strain: What are they and why are they used
instead of load and deformation?
Elastic behavior: When loads are small, how much deformation
occurs? What materials deform least?
Plastic behavior: At what

Mechanical Failure
ISSUES TO ADDRESS.
How do flaws in a material initiate failure?
How is fracture resistance quantified; how do different
material classes compare?
How do we estimate the stress to fracture?
How do loading rate, loading history, and t

Dislocations & Strengthening
Mechanisms
ISSUES TO ADDRESS.
Why are dislocations observed primarily in metals and alloys?
How are strength and dislocation motion related?
How do we increase strength?
How can heating change strength and other properties

Diffusion in Solids
ISSUES TO ADDRESS.
How does diffusion occur?
Why is it an important part of processing?
How can the rate of diffusion be predicted for
some simple cases?
How does diffusion depend on structure
and temperature?
1
Diffusion
Diffusion