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所在平台: Udemy |
课程主页: https://www.udemy.com/course/materials-science-and-engineering-me-202/
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课程名称：材料科学与工程 ME 202 概述： 本课程旨在深入探讨固体中的原子结合、结合力与能量、主要和次要结合。内容涵盖晶体固体的结构，包括晶格、单元格和晶体系统，密度计算，晶体方向和平面，线性和面原子密度。同时，还将研究固体中的杂质和缺陷，原子振动和扩散，材料的力学特性，包括弹性与塑性变形和再结晶。课程特别强调单相和多相材料的相图，尤其是铁-铁碳体系（钢和铸铁）。还将讨论金属和合金的热处理：退火、正火、淬火和回火，复合材料和聚合物。最后，介绍冲击、断裂、疲劳和蠕变特性，以及断裂力学的基本概念。 课程单元： 单元1：材料导论 历史视角、材料科学与工程、材料分类、先进材料、加工/结构/性能的关系。 单元2：原子结构与原子间结合 原子结构基础、原子中的电子、周期表、结合力与能量、主要原子间结合、次要结合、重要材料和分子。 单元3：晶体固体的结构 晶体结构基础、单元格、金属晶体结构、密度计算、多晶相与单晶材料、各向异性、X射线衍射、非晶固体。 单元4：固体中的缺陷 空位与自间隙、固体中的杂质、线性缺陷与界面缺陷、原子振动、显微镜技术、晶粒大小。 单元5：扩散 扩散机制、稳态与非稳态扩散、影响扩散的因素、半导体中的扩散。 单元6：金属的机械性能 应力与应变概念、应力-应变行为、弹性材料的特性、材料性能的可变性、安全设计因子等。 单元7：相图 溶解极限、相、微观结构、单元相图与二元等相系统、相平衡的解读等。 单元8：陶瓷的结构与性能 陶瓷的晶体结构、缺陷、扩散、脆性断裂等。 实验部分：机械测试；剪切与弯曲测试 单元9：聚合物的结构 碳氢分子、聚合物分子、聚合物分子的化学性质、分子量、形状、结构与构型等。 单元10：聚合物的特性、应用与加工 应力-应变行为、宏观变形、粘弹性变形、断裂、半结晶聚合物的变形及其影响因素等。 本课程的目标是让学生掌握材料的基本结构与性能概念，并能够独立分析不同材料在实际工程中的应用。
Atomic bonding in solids, bonding forces and energies, primary and secondary bonds. The structure of crystalline solids, lattice, unit cell, and crystal systems, density computation, crystal directions and planes, linear and planar atomic densities. Impurities and imperfections in solids: point, line and interfacial defects. Atomic vibration and diffusion. Mechanical properties of materials. Elastic and plastic deformation and recrystallization. Phase diagrams of single phase & multiphase materials with emphasis on iron-iron carbide system (steel & cast iron). Thermal processing of metals & alloys: annealing, normalizing, quenching and tempering, composite materials, polymers. Impact, fracture, fatigue and creep properties and introduction to fracture mechanics.This course is to demonstrate knowledge of the basic concepts of structure and properties of materials, to apply this knowledge efficiently, and independently to analyze the structure and properties of different materials used in real engineering applications.Unit 1: Introduction to MaterialsHistorical perspective, materials science and engineering, classification of materials, advanced materials, processing/structure/properties correlations.Unit 2: Atomic Structure and Interatomic BondingAtomic structure fundamentals, electrons in atoms, the periodic table, bonding forces and energies, primary interatomic bonds, secondary bonding, materials of importance, molecules.Unit 3: The Structure of Crystalline SolidsCrystal structure fundamentals, unit cells, metallic crystal structure, density computation n, polymorphism and allotropy, crystal systems, point coordinates, crystallographic directions and planes, linear and plane densities, close-packed structures, single crystals, polycrystalline materials, anisotropy, X-ray diffraction, non-crystalline solids.Unit 4: Imperfections in SolidsVacancies and self-interstitials, impurities in solids, specification of composition, dislocation-linear defects, interfacial defects, and volume defects, atomic vibrations, microscopy, grain size.Unit 5: DiffusionDiffusion mechanisms, steady and non-steady state diffusion, factors that influence diffusion, diffusion in semiconductors.Unit 6: Mechanical Properties of MetalsConcepts of stress and strain, stress-strain behaviour, anelasticity, elastic properties of materials, tensile properties, true stress and strain, elastic recovery after plastic deformation, compressive, shear and torsional deformations, hardness, variability of materials properties, design/safety factors.Unit 7: Phase DiagramsSolubility limits, phases, microstructure, phase equilibria, unary phase diagrams, binary isomorphous systems, interpretation of phase diagrams, development of microstructure in isomorphous alloys, mechanical properties of isomorphous alloys, binary eutectic systems, development of microstructure in eutectic alloys, equilibrium diagrams with intermediate phases, eutectoid and peritectic reactions, congruent phase transformations, ceramic and ternary phase diagrams, the Gibbs phase rule, Fe-Fe3C phase diagram, development of microstructure in iron carbon alloys.Unit 8: Structure and Properties of CeramicsCrystal structures, silicate ceramics, carbon, carbon nanotubes, imperfections in ceramics, diffusion in ceramics, ceramic phase diagrams, brittle fracture, stress-strain behavior, mechanisms of plastic deformation.Lab Experiment: Mechanical testing; Shear and bend testsUnit 9: Polymer StructuresHydrocarbon molecules, polymer molecules, the chemistry of polymer molecules, molecular weight, shape, structure and configuration, thermoplastic and thermosetting polymers, copolymers, polymer crystallinity, defects in polymers, diffusion in polymers.Unit 10: Characteristics, Applications, and Processing of PolymersStress-strain behavior, macroscopic deformation, viscoelastic deformation, fracture, deformation of semi crystalline polymers, factors influencing mechanical properties, deformation of elastomers, crystallization, melting, the gas transition, melting and glass transition temperatures, plastics, elastomers, advanced polymeric materials, fibres, polymerization, polymer additive, forming techniques for plastics, fabrication of elastomers, fabrication of fibers and films
