Program tanımları
METALURJİ ve MALZEME MÜHENDİSLİĞİ DOKTORA PROGRAMI
Programın Amacı
Metalürji ve Malzeme, Kimya, Makine ve benzeri mühendislik bölümleri, ve Fizik, Kimya, Jeoloji ve benzeri fen bilimleri mezunlarının Metalürji ve Malzeme Mühendisliği alanlarında uzmanlaşmalarını sağlamak ve ilgili alanlarda araştırma altyapısı oluşturulması ve öğretim elemanı yetiştirilmesine katkıda bulunmak.
Programın Dili: İngilizce
Bilimsel Hazırlık Programı Gerektiren Bilim Alan ve Dalları
Programa kabul edilen adayların aşağıdaki dersleri veya eşdeğer sayılabilecek dersleri lisans öğretimleri sırasında almış olmaları, almadıkları ders sayısının 3’ün üzerinde olması durumunda Marmara Üniversitesi Lisansüstü Eğitim-Öğretim ve Sınav Yönetmeliğinin (2002) 37.Maddesi uyarınca Bilimsel Hazırlık Programını tamamlamaları gerekir.
Doktora Programı Ders İçerikleri
PHASE TRANSFORMATIONS
Thermodynamics of phase transformations, stability criteria, classification of phase transformations, rate theory of phase transformations, classical nucleation theory, precipitation from solid solution, spinodal decomposition, metastable phases, transition phases and GP zones, massive transformations, martensitic transformations, order-disorder transformations, phase transformations in glasses
DEFECT IN MATERIALS
Defects in metals, alloys, semiconductors and inorganic compounds: point defects, line defects, planar defects, homophase and heterophase interfaces. Effects of different parameters, such as temperature and impurities, on defect concentrations. Relation of lattice defects to the physical and mechanical properties of crystalline solids. Examples of defect dependent processes, such as diffusion, ionic and electronic conductivity, oxidation, and sintering. Surface and interface effects on defect concentrations. Introduction to point imperfections and their relationship to transport properties in metallic, covalent, and ionic crystals. Distributions of structure and defects: an introduction to microstructure. Technical applications of solid electrolytes and solid-state ionics as semiconductor, sensors, batteries and fuel cells are discussed.
SOLID STATE CHEMISTRY
Description of crystal structures. Crystal chemistry of the major inorganic structural families; Concepts of structure-property relationships. Dependence on properties of solids on chemical bonding and structure. Factors that influence crystal and ionic structures. Crystal defects and nonstoichiometry. S olid sol uti on mechanisms . Principles of crystal growth, reactions and diffusion in solids, and the theory of conductors and semiconductors. Relationship between crystal structure, defect structure, composition and properties - as applied to a wide range of materials, with useful magnetic, electrical and optical properties.
THEORY OF DISLOCATIONS
Physical basis for dislocations and geometric properties, Stresses, 3-D analysis of a homogenous stress state, Stress transformations, Strains, strain transformations, Elasticity, Theory of straight dislocations, screw and edge dislocations, theory of curved dislocations, dislocation interactions, self-energies, Dislocation dynamics, Effect of crystal structure on dislocations, slip system of perfect dislocations, partial dislocations in free metals fartial dislocations in other structures, dislocations in ionic crystals, kinks, jogs, glide and climb processes, dislocation sources, dislocation pile-ups, dislocation point defect interactions.
ADVANCED TRANSPORT PHENOMENA IN METALLURGY
Momentum transport mechanisms and viscosity, laminar flow, Navier Stokes equations, time dependent Newtonian flows, boundary layer theory, turbulent flow, macroscopic momentum balances, transient cases, polimeric liquids, heat transport mechanisms thermal conductivity, thermal boundary layer, heat transport in composite systems, enerji equation, conductive heat transport under transient conditions, temperature profiles in turbulent flows, heat transfer coefficients, radiation heat transport, mass transport mechanisms and diffusivity, multicomponent systems, concentration gradients in laminar and turbulent flows, macroscopic mass balances, Maxwell-Stefan equations, mass transport through membranes and porous systems.
INTRODUCTION TO QUANTUM MECHANICS AND MODELLING OF PHYSICAL BEHAVIOR OF PERIODIC STRUCTURES
Introduction to quantum mechanic; derivation of Schrödinger Equation, properties of wave function, time independent, one dimensional solutions, standing and traveling waves, applications of boundary value problems for finite and infinite wall potentials. Fermi distribution function. The electric conduction mechanisms and resistance in materials. Structural defects, their effects in conduction. Application of wave equation to periodical structures, Bloch functions. Diffusion coefficient, mobility, temperature, electrical conduction, extrinsic and intrinsic defects. Semi conductors and band theory applications, n type, p type conduction. Pressure, defect concentration and conductivity relations. Technological applications, resistance, capacitors, sensors, superconductors. Dielectriacal properties, oxygen sensors and pumps, piezo electricity and pyroelectrical properties.
FRACTURE AND FATIGUE OF ENGINEERING MATERIALS
Fundamental Concepts Of Fracture. Linear Eastic Fracture Mechanics, Stress Concentration Effect Of Flaws, Griffith Theory, Stress Analysis For Cracks, Fracture Toughness And Stres Intensity Factor, Crack Tip Plasticity, Plane Stress Versus Plane Strain. Elastic-Plastic Fracture Mechanics, Dynamic And Time-Dependent Fracture. Fracture Mechanisms In Metals, Brittle Fracture, Ductile Fracture, Ductile Brittle Transition. Fracture Mechanisms In Plastics. Fracture Mechanisms In Ceramics. Fatigue, Metallurgical Factors For Fatigue, Fatigue Crack Propagation, Damage Olerance Methodology.
ADVANCED MAGNETIC PROPERTIES OF MATERIALS
The content of this course includes the origins of magnetism at the atomic level ; diamagnetism, paramagnetism, Langevin Theory of paramagnetism, the origins of magnetic ordering (ferro-, ferri-, and antiferromagnetism), magnetic anisotropy, magnetic domains, domain wall, magnetostriction, magnetocrystalline anisotropy, susceptibility and permeability, coercivity; hard and soft magnetic materials for engineering applications; thin film and fine-particle behavior, technological application such as magnetic recording technology; magnetic measurements of properties for materials evaluation.
MODELLING OF DIFFUSION AND HEAT TRANSFER WITH FINITE DIFFERENCE IN MATERIALS SCIENCE
Introduction, Fundamentals, Basic of Finite Difference Equations, Some Complications with Finite Difference Equations, Application of Finite Difference Equations to Simple Steady-State Problems, Application of Finite Difference Equations to Simple Transient Problems, Computer Solution of Heat Transfer Problems, Computer Solution of Diffusion Problems, Miscellaneous Problems.
MODELLING AND SIMULATION OF CHEMICAL METALLURGICAL PROCESSES
Basic principles of modelling, analysis of various chemical metallurgical systems, mass and energy balances, rate processes in metallurgical systems, batch and continuous processes, process parameters, modelling of the metallurgical processes considering the control parameters, solution of the model equations, solution of the models in computer environment, mass and energy balance of the complete process, simulation of the process.
ADVANCED REFRACTORY MATERIALS
Introduction and Definitions, Demand and Applications of Refractory Materials, General Classification, Acidic, Basic and Neutral Refractories, Refractory Raw Materials, Production Methods of Refractories, Recent Developments in Refractory Materials: Carbon Containing Refractories, Refractory Castable (Monolithic) Refractories, Non-Oxide Refractories, Insulating Refractories, Refractory Fibres, Coatings and Fused Refractories, Properties and Test Methods of Refractories, Application Fields of Refractories in Metallurgical and Other Industrial Plants.
MICROSTRUCTURAL CHARACTERIZATION OF MATERIALS
Microstructural concepts and crystallography. General influence of microstructure on properties. Diffraction analysis of crystal structure using X-ray and electron beams. Imaging using microscopes: optical, TEM, SEM and ESEM. Basic fundemantals of SEM and TEM. Specimen preparation for SEM and TEM. Electron beam-specimen interactions. Techniques for characterizing microstructures: SEM and TEM. Electron imaging: diffraction contrast imaging of crystals and crystal defects; dynamical electron diffraction. Diffraction: theory, types of patterns and interpretation. Operations of TEM and SEM. Interpretation of data. Stereoscopy and stereology. Chemical microanalysis in electron microscopy: X-ray and electron energy-loss spectrometry.
DETERMINATION OF INTENSITY, CRYSTAL STRUCTURE AND PHASE DIAGRAMS
Scattering Phenomena: Compton Scattering, Thomson Scattering, Atomic Scattering, Unit Cell Scattering, Structure Factor Derivation and Calculations, Multiplicity Factor, Lorentz Factor, Absorption Factor, Effect of Strain in line broadining. Indexing patterns of Cubic Crystals and non cubic crystals. The effect of cell distortion on the powder pattern. Determination of the number of atoms and their positions in a unit cell. Order-disorder determination. Phase Diagram Determination: solid solutions, solvus curves determination by parametric and disappearing phase-methods, examples and applications.
ADVANCED DEFORMATION PROCESSING
Classification of Materials processing. Fundamentals of Elasticity and Plasticity. Stress- Strain curve and related mechanical properties. Methods of Analyzing Metalworking Processes, Slap method, Limit Analysis, Slip-line field method, and finite element method. Classification of metal working processes, rolling, bar drawing, extrusion and forging processes. Sheetmetal forming processes, bending, stretch-forming, deep dawing.
TEXTURE AND RESIDUAL STRESS MEASUREMENT TECHNIQUES
Definition and description of residual strains and stresses, stress measurement techniques (XRD, Drilling, Ultrasonography, Curvature, e.t.c), texture measurement techniques (XRD, Elektron and Neutron), represenatation of crstallographic texture (ODF, Pole figures), quantitative texture analysis.
ADVANCED IRON AND STEEL PRODUCTION
Introduction, General Overwiew in the Iron and Steel Industry in Turkey and in the World and Current Problems in the Sector, Recent Developments in Iron and Steel Industry and the Reasons for their Emerging. Sponge Iron (DRI) and its Properties, Sponge Iron Production Technologies: Sponge Iron Production by Coal, Sponge Iron Production by Reducing Gas, Steel Production by Sponge Iron, Pig Production Using Cold Bonded Composite Pellets, Recent Developments in Blast Furnace, Recent Developments in Electirc Arc Furnace, Recent Developments in BOF Technologies, Recent Developments in Ladle Metallurgy, Recent Developments in Continuous Casting, Recent Developments in Recycling of Iron and Steel Production Wastes .
CORROSION AND ADVANCED MEASUREMENT TECHNIQUES
Prenciple of corrosion, prevention of corrosion, corrosion measurement techniques (polarization techniques, EIS, ENM), advanced techniques (SVET, AES, SECM) and micro-corrosion measurement techniques
ADVANCED GLASS CHEMISTRY AND TECHNOLOGY
Glass Structure (glass formation and crystallization, microstructure, glass transition, phase separation). Industrial Raw materials used in glass making and their properties. Glass melting and forming (inorganic glass, compositions and batching, glass meltimg and forming, annealing). Characteristics of Glasses. Glass Structure and structural models. Physical, chemical, optic, electrical, dielectric and mechanical properties of glasses. Methods of characterization. Glass Chemistry. of Glasses. New Glass production techniques (sol-gel etc.). Commercial glass systems (borosilicate glasses, phosphate glasses, metallic glass etc.). Recent Developments in Glasses (optical fibers, nonlinear optical glasses, bioglasses, semiconducting glasses). High-Tech Applications of glasses (optics, optical fibers and amplifiers, dielectrics, electrolytes and electrodes).
MECHANICS OF COMPOSITE MATERIALS
Introduction, Reinforcement, matrix materials, Polymer matrix Composites, Metallic matrix composites, Ceramic matrix composites, Micromechanics of composites, Macromechanics of composites, Fracture mechanics and toughening mechanism, Impact resisance, Fatigue and Creep.
GAS-METAL REACTIONS
Thermodynamics and kinetics of gas-metal reactions, oxidation of pure metals and alloys, selective oxidation (protective oxidation), mixed oxidant corrosion, hot corrosion, corrosion of ceramics, and the use of metallic coatings and thermal barrier coatings for the protection of high-temperature components, stresses in oxide films, film adhesion
SCIENCE AND TECHNOLOGY OF NANOSTRUCTURES
Comprehensive introduction to the developing field of nanoscience and nanotechnology. Nanomaterials. Materials properties as a function of length-scale and dimensionality. Low-dimensional structures: Quantum wells, Quantum wires, and Quantum dots, Nano clusters & Nano crystals. Properties of Nanomaterials: mechanical properties, optical properties, magnetic properties, dielectric properties, electronic properties. Applications of nanomaterials: in medicine, electronics, magnetism, and electro-mechanical systems. Special nanostructured materials and their applications: fullorenes, carbon nanotubes, porous silicon. Biology and nanomaterials.
PHYSICAL METALLURGY OF ALUMINUM ALLOYS
Introduction. Properties of Pure Aluminum. Phase Diagrams of Aluminum Alloys. Microstructure of Aluminum Alloys. Work Hardening, Recovery, Recrystallization, and Grain Growth. Metallurgy of Heat Treatment and General Principles of Precipitation Hardening. Effect of Alloying Elements and Impurities on Properties. Properties of Commercial Casting and Wrought Aluminum Alloys.
ADVANCED EXTRACTIVE METALLURGY
Introduction, General Overview of Extractive Metallurgical Industry in Turkey and in the World, Current existing techniques for the extraction of most common metals (primary ores and secondary raw materials such as waste products). Metallurgical balances, technical-economical calculations for unit processes in mineral extraction industry, sampling techniques, crushing and grinding, size analysis, screening, classification, Separation processes and concentrating - gravity separation, dense medium separation, magnetic separation, electrostatic separation and ore sorting. Solid - liquid separations - flocculation, thickening, centrifuges, filtration and thermal drying. F lotation, surface adsorption and flotation reagents, mineral bubble interactions, flotation equipments. Flotation of sulphides, non-sulphides, and agglomeration. H ydrometallurgical unit processes - Leaching, separation, extraction and recovery of some selected metals. Oxidative and non-oxidative leaching of minerals, purification and recovery of metals by precipitation, ion exchange and solvent extraction and the recovery of metals by reduction and electrowinning, P yrometallurgical unit processes , Electrometallurgical unit processes, Recycling of metals (case study)
DIFFUSION IN SOLIDS
Introduction. Driving Forces and Fluxes for Diffusion. Diffusion Equation. Solution to the Diffusion Equation. Diffusion in Multicomponent Systems. Atomic Models for Diffusion. Diffusion in Crystals. Diffusion along Crystal Imperfections. Diffusion in Non-crystalline Materials.
ADVANCED POWDER METALLURGY
Principles of powder preparation. Advanced fabrication techniques of metallic and oxide powders. Characterization of powders. Formation and characterization of composite powders. Processing-microstructure-property relations. Special topics in P/M. Tool and bearing materials, sintered friction materials. Electronic and magnetic materials. Nuclear application of P/M. Mixing, compaction and sintering.
