Outline
FeFe3C phase diagram
Classifications of Fe-C alloys
Microstructure of Fe-C alloys
The phase rule
Equilibrium in multiphase systems
Equilibrium in heterogeneous systems
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507 Lecture 18/1
Interpretation of Phase Diagrams
For a given temperature and composition we can
use phase diagram to determine:
1) The phases that are present
2) Compositions of the phases
3) The relative fractions of the phases
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar
Outline
Thermodynamic Models
Regular Solution Models
Dr. M. Medraj
Sublattice Model
Associated Solutions
Cluster Variation Model
Quasichemical Model
Cluster Expansion Model
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507 Lecture 19/1
Thermodynamic Models
Outline
Introduction
- Definitions and basic concepts
- Phases and microstructure
Binary
PD and Gibbs free energy
Binary isomorphous systems (complete solid solubility)
Eutectic phase diagram
Interpretation of phase diagrams
Mech. Mat. Eng. Dept. Mas
Assignment 3
MSE 507
Due Thur. Nov. 10th
Question 1:
a) Liquid A and B are completely miscible and form an ideal solution. The vapor
pressures of two liquids are 2 x 10-3 atm and 5 x 10-3 atm at temperature T, respectively.
Calculate the mole fraction of
Outline
Utility of phase diagrams
Construction of phase diagram
Phase diagram calculation using
Gibbs energy minimization
Phase diagram with intermediate phases
- solid solutions
- compounds
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507
Outline
Review Sublattice Model
Example Sublattice Model
Thermodynamic Modeling of multicomponent systems
Example Alloy Design
Example Process Design
Ternary Phase Diagrams
Solidification Path
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MS
Mini-Project # 3
MSE507
Due Mon. Dec. 05, 2016
This mini-project is meant to acquaint the student with thermodynamic modeling and
optimization and phase diagram calculation.
You are required to model a fictitious binary A-Xb system. Where element A has BC
Outline
Experimental data needed for
thermodynamic modeling of:
- Liquid solution
- Stoichiometric compounds
- Ordered solid solutions
Thermodynamic data
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507 Lecture 18/1
Experimental data
G = Grs
Outline
Liquid and solid solutions
Gibbs free energy of binary solutions
Ideal solution
Chemical potential of an ideal solution
Regular solutions
Activity of a component
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507 Lecture 12/1
Regul
Outline
Review
Regular solutions
Activity of a component
Real solutions
Equilibrium in heterogeneous systems
Gibbs energy minimization
Mech. Mat. Eng. Dept. Masdar Institute
Dr. M. Medraj
MSE 507 Lecture 13/1
Review
Regular Solutions
Solutions
Ideal
Assignment 4
MSE 507
Due Thur. Dec. 8th
Question 1:
Construct the hypothetical phase diagram for metals A and B between temperatures of
600C and 1000C given the following information (assume all phase boundaries are
straight lines):
The melting temperatur
Mini-Project # 2
Due Monday Nov. 14th
MSE507
The activity coefficient of Mg in liquid Mg-Sn alloys at 800C, with reference states
being pure liquid Mg and pure liquid Sn at 800C, have been determined experimentally
as:
XMg
Mg
1
0.90
0.80
0.70
0.67
0.60
1.
Definitions: Components
Outline
Components are chemically recognized species of fixed composition.
- e.g. Fe and C in carbon steel, H2O and NaCl in salted water
Definitions
First Law of Thermodynamics
Systems are primarily categorized by the number of c
Outline
Introduction
Enthalpy and entropy dependence on P and T
Gibbs free energy
Helmholtz free energy
Chemical potential
Maxwell equations - revisited
Gibbs-Duhem equation
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507 Lecture 6/1
I
Outline
Second Law of Thermodynamics
Entropy Calculations
Equilibrium
Third Law of Thermodynamics
Physical Meaning of Entropy
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507 Lecture 5/1
The 2nd Law - Again
The second law can be reformula
Outline
Second Law of Thermodynamics
Entropy
Reversible and Irreversible Processes
Physical Meaning of Entropy
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507 Lecture 4/1
Reversible and Irreversible Processes
Wood will burn spontaneously
Outline
Heat Capacity
Enthalpy Standard State
Heat of Formation
Heat of Reaction
Theoretical Calculations of Heat Capacity
Dr. M. Medraj
Mech. Mat. Eng. Dept. Masdar Institute
MSE 507 Lecture 2/1
Introduction
The heat capacity of a system is defined
Mini-Project # 1
MSE 507
Due Mon. Oct 10th 2016
This mini-project is meant to acquaint you with some of the literature in the area of
Thermodynamics of Materials. It offers the opportunity to summarize and evaluate
recently published research results pert
Quantitative X-Ray AnalysisThe Basics
Students:
Aderemi, Oluwadamilola Idayat
Mustafa, Ibrahim
Alabi, Adetunji Tolulope
Instructor:
Dr. Amal Al Ghaferi
16th March, 2016
1
INTRODUCTION
Previously, we have learnt that x-rays emitted from a specimen bombarde
Masdar Institute of Science and Technology
MSE [612]
Chapter [15]: Coating and
Conductivity Techniques for
SEM and Microanalysis
Presented By:
Haneen Suradi, Lina Orabi, Muntaser Al Mansoori and Lama Mahmoud
Supervised By:
Prof. Amal Al Ghaferi
Semester:
MSE612 : Imaging of Materials: Scanning
Electron Microscopy and X ray Microanalysis
Spring-2016
Where the telescope ends, the microscope begins
"Seeing is Believing".
Sunday, January 10, 2016
1
Instructor
Education
Research
Teaching vision
Students
Na
Spring 2016
MSE 612
Imaging of Materials: Scanning Electron Microscopy and X ray
Microanalysis
Exam 1
Name :
1. Describe the imaging capabilities of SEM and what are the basic components of the SEM. (4
points) page 2-3
2. Describe SEM Imaging Modes and ex
Chapter 3 : Electron Beam-Specimen Interactions
Sunday, February 14, 2016
1
3.2. The Beam Enters the Specimen
image and analyze a specimen of silicon.
Assume that we first select a beam accelerating potential of 20 kVfrom a thermal
field emission source
Chapter 13 Ambient Temperature Specimen
Preparation of Biological Material
TITLY FARHANA FAISAL
NAVYA THOMAS
AMINA HASSAN SAID ISLAM
MSE 612: Imaging of Materials:Scanning Electron Microscopy and X-ray Microanalysis
CLASS PRESENTATION
1
Introduction
Pre
GENERATION OF X-RAY IN THE SEM
SPECIMEN
(CHAPTER 6)
LINA TIZANI
HONGXIA LI
MUSBAUDEEN BAMGBOPA
Wednesday, March 16, 2016
Version 1
1
INTRODUCTION
The electron beam generates x-ray photons in the beamspecimen interaction
volume beneath the specimen surface