| 教学大纲 TOPICS AND READING ASSIGNMENTS:1. Preface and overview 2h1.1 What solidification is ConceptionImportance of solidification （in nature and industry）Conditions for solidification For instance: Water - Ice - Snow 1.2 Essential factors of solidification process Temperature, composition, physical characteristic 1.3 Essential factors of Microstructure Grain size，Morphology，precipitated phase2. Melt structure and characteristics 2h2.1 Experimental ConsiderationChange in volume on meltingLatent heat of meltingEntropy of melting Diffraction studies of liquid structureTransport properties2.2 Theories of Liquid StructureCondensation theoriesLattice theoriesGeometrical theoriesNew development2.3 Synchrotron radiation SAXS and XRD3. Nucleation 4h3.1 Thermodynamic AspectsConditions for NucleationHomogeneous nucleation Rate of nucleation3.2 Nucleation agent heterogeneous nucleation3.3 Interface structureTiB2-Al interfaceNucleation ability4. Growth 4h4.1 Nucleus growth Influencing factorsGrowth by surface nucleationGrowth on imperfections5. Morphological instability of a Solid/Liquid interface Interface instability of pure substanceSolute pile-up at a Planar solid/liquid interface6. Solidification Microstructure: Cells and Dendrites 6h6.1 Constrained and unconstrained growth6.2 Morphology and crystallography of dendrites6.3 Diffusion field at the tip of needle-like crystal6.4 Operating point of the needle crystal - tip radius6.5 Growth style evolution of dendrite 6.6 Primary spacing of dendrites after directional growth6.7 Columnar- Equiaxed transition7. Solidification Microstructure: Hypoeutectic, hypereutectic, Eutectic, Peritectic 6h7.1 Regular and irregular eutectics 7.2 Diffusion - coupled growth7.3 Competitive growth of dendrite and eutectic7.4 Synchrotron radiation imaging8. Solute Redistribution 6h 8.1 Mass-balance in directional solidification8.2 The solute distribution in directional solidification: solid solute and multi-phases alloy8.3 Characterization of segregation Utilization of segregation9. The Structure of casting 6h9.1 Macrostructure9.2 The chill zone9.3 The columnar zone9.4 The equiaxed zone9.5 Theories of the development of the equiaxed zone9.6 Refinement of solidification structure10.Summary Application of fundamentals Discussion： 1 Melt structure and solidification microstructure 2 Methods for refinement Experiment Supercooling in solidificationInterface instability of alloyPerturbation analysis | 
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