Lecture 2.1 Notes
Atomic bonding: Ionic Bonds
Atomic Bonding: Metallic bonding (slide 16)
Using NA as an example when there is a lot of Na they all lose their
only valence electron, creating a sea of electrons which is the
reason they stick to
Ca behaves chemically most like which of these other
Columns: Similar Valence Structure
give up 1e
give up 2e
give up 3e
Thursday: Atomic Structure
Tuesday: Atomic Bonding
Ring of Fe atoms
on Cu surface
Wavelike behavior of electrons from
Cu surface trapped in ring
Philosophical Magazine A
ISSN: 0141-8610 (Print) 1460-6992 (Online) Journal homepage: http:/www.tandfonline.com/loi/tpha20
Computer simulations of corrosion: Selective
dissolution of binary alloys
K. Sieradzki , R. R. Corderman , K. Shukla & R. C. Newman
See discussions, stats, and author profiles for this publication at: https:/www.researchgate.net/publication/303722246
Corrosion and Passivation of Magnesium Alloys
Article in Corrosion Science May 2016
J. Electrochem. Soc., Vol. 139, No. 1, January 1992 9 The Electrochemical Society, Inc.
1. G. A. Scholz and H. Gerischer, This Journal, 132, 1643
2. D. F. Blossey, Phys. Rev., B3, 1382 (1971).
3. M. Cardona, in "Modulation Spectrosc
The Measurement of pH in Aqueous
Systems at Elevated Temperatures Using
Palladium Hydride Electrodes
Digby D. Macdonald, *.1 Paul R. Wentrcek, and Arthur C. Scott
SRI International, Materials Research Laboratory, Menlo Park, California g~025
8-10. Derive the integrated formula for the Helmhotlz energy departure function.
Z 1 d ln Z
1 - B
d ln 1 B
d 1 B ln 1 B
ln 1 B 0 ln 1 B 0
8-16. Using the PR-
4-2. An ideal gas, with temperature independent CP=(7/2)R, at 15oC and having an
initial volume of 60 m3, is heated to constant pressure (P=0.1013 MPa) to 30oC by
transfer of heat from a reservoir at 50oC.
Calculate Sgas, Sreservoir, Suniverse?
Mater. Res. Soc. Symp. Proc. Vol. 1301 2011 Materials Research Society
Mg-Ti: A Possible Biodegradable, Biocompatible, Mechanically Matched Material for
Ilona Hoffmann1*, Yang-Tse Cheng1, David A. Puleo2, Guang
11-14. A vapor/liquid experiment for the carbon disulfide (1) + chloroform (2)
For all parts, we first derive the activity coefficient from a given experimental data.
1 1 sat
1 0.363 34.98 1.020
1 0.2 27.3
(a) isothermal, closed system, ideal gas
ideal gas isothermal U H 0
close system U Q WE / C 0 Q WE / C PdV
dV RT ln 2
(b) constant V, closed system, ideal gas
V 0 WE / C 0
ideal gas close
The Enhancement of Mg Corrosion Resistance by
Alloying Mn and Laser-Melting
Youwen Yang 1, , Ping Wu 2, , Qiyuan Wang 3 , Hong Wu 4 , Yong Liu 4 , Youwen Deng 3 ,
Yuanzhuo Zhou 1 and Cijun Shuai 1,4, *
State Key Laboratory of H
Fundamentals of magnesium
BACKGROUND:  Due to the light weight, high strength-to-weight ratio, high specific stiffness,
good elastic modulus and conductivity, as well as high damping capacity,Mg alloys have received
much attention in recent res
Resillience- capacity of material to absorb energy when it is deformed elastically and then, upon unloading, to have this energy
Impurity point defects- are found in solid solutions of which there are two types: substitutional and interstitial.
Note: This test adds up to more than 100 points. Therefore it is a
compilation of past problems rather than one complete exam.
Actual exam will be adjusted so that you can finish it in 50
Lectures 7&8 - Practice problems
Quiz 7 - Practice problems
In Figure 9.38 (in Callister) is shown the pressuretemperature phase diagram for H2O. Apply the Gibbs
phase rule at points A, B, and C; that is, specify the number of degrees of freedom at eac
Lecture 3 - Practice problem solution
For the HCP crystal structure, show that the ideal c/a ratio is 1.633.
Show that the atomic packing factor for BCC is 0.68.
Calculate the radius of an iridium atom, given that Ir has an FCC crystal structure,
Lectures 11&12 - Practice problems
Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the
propagation of an elliptically shaped surface crack of length 0.25 mm and having a tip radius of
Lecture 2 - Practice problem solution
Given that the cp of Al is given by cp=20.7+0.0124*T (J/mol/K) in the temperature range 298 to 932 K and
that cp of Al2O3 is given by cp=106.6+0.0178*T-2,850,000*T-2 (J/mol/K) in the temperature range 298 to
Lecture 4 - Practice problems
Calculate the activation energy for vacancy formation in aluminum, given that the equilibrium number
of vacancies at 500C (773 K) is 7.57 1023 m-3. The atomic weight and density (at 500C) for aluminum
are, respectively, 26
Quiz 8 -9&10
A cylindrical rod of copper (E = 110 GPa, 16 106 psi) having a yield strength of 240 MPa (35,000 psi) is
to be subjected to a load of 6660 N (1500 lb f). If the length of the rod is 380 m
Quiz 55- -Practice
(a) Compare interstitial and vacancy atomic mechanisms for diffusion.
(b) Cite two reasons why interstitial diffusion is normally more rapid than vacancy diffusion.
(c) Prove that Dvacany=Ds