Teacher
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SANTAMARIA Ulderico
(syllabus)
Group of theoretical topics: - Classes of materials of technological interest and their characteristic properties (mechanical, thermal, electrical properties and relative measurements). - Relationships between microstructure and properties (crystal defects, solid solutions). - Call on heterogeneous equilibriums and state diagrams. - Binding materials: lime and plaster; Natural and artificial hydraulic kicks; Silico-basal cement (Portland, blend: pozzolanic and high-furnace, special portland: ferric and white): production principles, grip and hardening mechanisms; Alluminous cement; Technical tests on cements. - Concrete cementitious: inert; Mortars and Concretes: properties and tests on fresh concrete (machinability, bleeding). Reoplasticità. Concrete Additives. Lightweight concretes: porous and cellular. Fibrorinforated conglomerates, fly-ash conglomerates, silica fume, and impregnated polymer. Properties of hardened concrete: retraction, viscous flow (fluage), mechanical strength. Concrete mixing or mix-design. Game-thermal treatments of cement-based conglomerates. Degradation of cementitious conglomerates. - Ceramic materials: ceramics for building (bricks, grés and porcelains). - Plastics: polymerization and polymer structure (polyethylene, polypropylene, PVC, PMMA, polyester resins, phenolic, polyamide, epoxy, polyurethane, silicones, elastomers); property; processing; Applications in modern building. Mechanisms of degradation. - Composite materials: classification. Matrices and reinforcements. Compatibilizers. Glass fibers. Carbon fibers. Aramid fibers. Production and ownership. Manufacturing processes. Metal matrix composites, ceramic matrix and polymer matrix. Sandwich structures. Plated metal structures. Notes on mechanical properties and reinforcing mechanisms. Wood: structure and properties. Production, ownership and use in engineering. - Metal materials. Ferrous alloys: cast iron, simple and bonded steels (from carpentry, stainless steel, tools). Iron-Carbon Status Chart. Steel thermal treatments (hardening, annealing, normalization). - Corrosion phenomena in metals. Protective methods against corrosion. -Materials for electronics. Electrical conductivity in metals. Intrinsic semiconductors. Extrinsic semiconductors. Doping. Devices semiconductors. Microelectronics. Semiconductor compounds. Electrical properties of ceramic materials. Dielectric properties. Ceramic capacitors for capacitors. Ceramic semiconductors. Ferroalloys ceramics. Piezoelectricity. -Material Glasses: Glasses. Factors that affect the formation of a glass. Electronegativity and type of bond. Viscosity. Thermodynamics of glass forming. Glass transition temperature. Crystal crystallization and glass formation. Structures and classification of glazing. Metal windows. Glass-ceramic.
Course specific topics: Introduction to the course. Introduction to the materials studied and the need to evaluate the properties. Properties of metallic, polymeric, ceramic materials in relation to structure and types of bonding. Composite materials. Ionic and covalent bond. Metallic bond. Secondary links. Material properties in light of the nature of the bonds. Metal structure. Spatial pattern and unit cells. Bravais crystalline systems and lattices. Cubic and hexagonal patterns. Atomic packing factors. Miller Indices. Comparison between CFC and EC pattern. Polymorphism and allotropy. X-ray diffraction. Amorphous materials. Solidification and imperfections. Homogeneous and heterogeneous solidification. Energies involved in homogeneous solidification. Crystal Growth. Grains. Solid substitutional and interstitial solutions. Point dials: holidays and interstitial atoms. The C in the Fe pattern: APF role and empty forms. Line defects: dislocations. Vector of Burgers. Motion of dislocations in plastic deformation. Dislocation motion: analogies. Plastic deformation and role of dislocations. Work hardening. Wheat borders. Gemini boards. Wheat size. Mechanical properties. Mechanical reaction of a stressed material: plastic deformation, elasticity and rupture. Static and dynamic forces. Mechanical resistance tests: traction test; Nominal stresses and deformations; Strain / deformation graph; Elastic, cutting and Poisson module; Ductility and its measures; Rupture and stripping effort. Real stress and strain. Examples of traction tests for different materials. Fracture Behavior. Ductile and fragile fracture. Toughness. Fracture in the presence of defects. Resilience test. Thick / delicate transition temperature. Hardness and hardness tests. Fatigue Behavior. Fatigue tests. Creep of metals and creep trials. Thermal properties: conductivity, thermal capacity, dilatation Linear and volume dilatation; Transition temperatures. Electrical conductivity: Ohm's law. Primary and Secondary Metallurgy. Production of iron and steel. Blast Furnace. Primary and secondary steel mills. Machining of metal materials. Strengthening mechanisms. Impact and temperature effect. Wheat size control. Strengthening for solid solution. Effect of alloy elements. Notes on moist and dry corrosion. Reduction Potentials. Liabilities. Corrosion Forms: Clothedness, Pitting, Tensor Corrosion and Selective Corrosion. Corrosion of iron in a humid environment. Pourbaix Diagrams. Noun on polarization curves. Methods of corrosion protection: painting; galvanizing; anodizing; cathodic protection. Designs and modifications to the environment to reduce corrosion. Status Diagrams: Balancing Microstructures. Binary Status Diagrams: Complete Miscibility in Liquid and Solid State. Determination of the number of phases, their composition and relative abundance. Cu / Ni status diagram. Full state miscibility state complete and partial solid state immiscibility state diagram. Eutectic and peremptical transformations. Examples of chart reading. Overview of ternary state diagrams. Introduction to the Fe / C state diagram. Balance chart. Fe / Fe3C state diagram. Great points. Perlite and rind. Critical Points. And, Ac and Ar. Simplified Diagram. Transformations during cooling for eutectoid, hypo- and hyper-eutectic steels. Steels and influence of alloy elements on eutectoid. Cast irons. White and gray ghise. Malleable and special ghosts. Non-equilibrium structures. Thermal Treatments and Mechanical Properties. Martensite. TTT and CCT curves. Hardening, scrubbing, annealing and recrystallization. Classification of steels. Designation of steels according to UNI EN 10027 and AISI
(reference books)
W.D. CALLISTER “Scienza e ingegneria dei materiali. Una introduzione”, EdiSES. BERTOLINI: 'Materiali da costruzione. Volume I ' Citta'Studi Edizioni M. LUCCO BORLERA, C. BRISI: 'Tecnologia dei materiali e Chimica Applicata' Levrotto e Bella W.F. SMITH, J.HASHEMI: 'Scienza e tecnologia dei materiali' McGraw-Hill, V. ALUNNO ROSSETTI: 'Il calcestruzzo: Materiali e Tecnologia' McGraw-Hill, A. R. WEST “Solid state Chemistry and its Applications”, John Wiley & Sons W.F. SMITH & J. HASHEMI “Scienza e tecnologia dei materiali”, McGraw-Hill. Dispense del docente
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