Akademik Məlumat İdarəetmə Sistemi
Department of Metallurgical and Materials Engineering
I.
INTRODUCTION
- Introduction.
- Crystalline and non-crystalline
structures.
- Symmetry operations.
- Space groups.
- X-Ray Diffraction
(1 week)
II.
CRYSTAL DIFFRACTION
AND THE RECIPROCAL LATTICE
- The incident
beam. Bragg law.
- Reciprocal lattice.
Geometrical structure factor.
- Laue derivation of
amplitude of scattered wave.
- Scattering from
lattice of point atoms.
- Atomic scattering
factor or form factor.
- Temperature dependence
of the reflection lines.
(2 week)
III.
ORDER-DISORDER TRANSFORMATION IN SOLID SOLUTIONS
- Order-disorder phase
transformation
- Long-range order (LRO)
in solid solutions
- LRO in CuZn
- LRO in CuAu
- Elementary theory of
LRO (homework)
- Short range order
(SRO) in solid solutions
- Elementary theory of
SRO (homework)
(2 week)
Homework: Types of ordered crystalline structures in binary alloys and their
characterization (L10, L12, L21, B2, DO3,
etc.).
IV.
X-RAY STUDIES OF LRO
- Superlattices
- Measurement of LRO.
Detection of superlattice lines
- Order in a solid
solution whose composition differs from that of the perfectly ordered
solution
- LRO in Cu3Au
(2 week)
Exp. I: Determination of LRO parameters in
Ni3Fe
|
V. METHODS OF ANALYSIS FOR DIFFUSE X-RAY
SCATTERING MODULATED LOCAL ORDER AND ATOMIC DISPLACEMENTS
- Order modulated
diffuse scattering
- Atomic-displacement
modulated diffuse scattering
- Recovery of order and
atomic-displacement coefficients from the diffuse intensity.
- Application of theory
to powder samples
- Intensity expression
for Huang diffuse scattering
- Conversion of
intensity measurements to absolute units.
- Corrections for
background intensities:
a) Fluorescence and
submultiple wavelength diffractions,
b) Parasitic scattering,
c) Compton scattering,
d) Temperature-diffuse
scattering
- Precautions in crystal
preparation and surface contamination
(2 week)
Exp. II: Determination of SRO parameters in
Ni3Fe
|
VI. LOCAL
ORDER IN AMORPHOUS MATERIALS
- Introduction
- Analysis of X-ray
intensity data from amorphous materials
- Experimental
procedures
- Experimental error
(2 week)
Exp. III: Local order in Glassy Materials
VII. Correlation
of atomic LRO and SRO with mechanical properties alloys.
- Introduction
- Hardening due to LRO
and SRO
- Work hardening of
long-range ordered alloys
- Strain aging of
ordering alloys
- Creep of ordered
alloys
(2 week)
VIII.
Effects of atomic LRO and SRO on electrical, magnetic, optical and thermal
properties
of crystalline and non-crystalline
materials.
(1
week)
REFERENCES:
1. Myeongkyu Lee, X-Ray Diffraction for Materials Research: From
Fundamentals to Applications,
CRC
Press, Taylor & Francis, USA, 2016
2. Weiss,
R.J., Solid State Physics for Metallurgists, Pergaman Press, Oxford, 1963.
3. Sinnott,
H.J., The Solid State for Engineers, John Wiley and Sons, N.Y. 1958.
4. James R.
W. Optical Princip1es of the Diffractions of X-Ray, G. Bell and Sons, London,
1950.
5. Warren
B.E., X-Ray diffraction, Addisson-Wesley Pub. , Comp, Massachusetts, 1969.
6. Guinier
A. , X-Ray diffraction in crystals, Imperfect Crystals, and Amorphous Bodies,
W.H.
Freeman and Comp., San Francisco, 1963.
7. Wooster
W.A, Diffuse X-Ray Reflections from Crystals, Clarendon Press, Oxford, 1962.
8. Local
Atomic Arrangements Studied by X-Ray Diffraction, Metallurgical Society
Conferences,
Vol. 36, Edited by Cohen J.B. and
Hilliad J.E, N.Y., 1966.
9. Alloying
Behavior and Effects in Concentrated Solid Solutions, Metallurgical Society
Conferences, Vol.29, Edited by Massalski
T.B., N.Y., 1965.
10. Cohen
J. B., Diffraction Methods in Materials Science, Macmillan Comp., N.Y. 1966.
11. Barett
C. and Massalski, Structure of Metals, McGraw-Hill, N. Y., 1966.
12. Azaroff
L.V., Elements of X-Ray Crystallography, McGraw-Hill, N.Y., 1968.
13. Azaroff
L.V. and Donahue D.R.J., Laboratory Experiments in X-Ray Crystallography,
McGraw-
Hill, N. Y., 1969.
14. Kelly
A. and Groves G.W., Crystallography and Crystal Defects, Addison-Wesley,
Mass., 1970.
15.
Woolfson M.M., An Introduction to X-ray Crystal1ography, Univ. Press,
Cambridge, 1970.
16. Wilson
A. J. C., Elements of X-ray Crystallography, Addison Wesley Mass., 1970.
17.
Phillips F.C., An Introduction to Crystallography, Wiley, N.Y., 1972.
18. Tairao
Shuji, ed., X-Ray Studies on Mechanical Behaviors of Materia1s, Soc. of Mat.
Sci.,
Kyoto, Japan, 1974.
Schedule: Monday, 13:40 - 17:30, B-208
Grading:
Project
I : 15%
Project
II : 15%
Project
III : 20%
Homework : 10%
Attendance : 5%
Final
Exam : 35%