材料科學(xué)基礎(chǔ)英文版課件_(8)(完整版)
【正文】 t room temperature, and bind polymer chains together to form solid polymers In water (H2O): each hydrogen atom shares its charge with the nearest oxygen atoms Hydrogen (H) – losing part of its share – positively charged Oxygen (O) – getting more share – negatively charged Positively charged H atom – bridging between two neighbouring O atoms Charge redistribution – a dipole moment for each H2O molecule Secondary bonds (5) Arrangements of H2O molecules in the form of ice, showing the hydrogen bonds Condensed states of matter Primary and secondary bonds – matter can condense from the gaseous state to liquids and solids Interatomic forces F = dU/dr Hooke’s Law ?? = E ? 。Fundamentals of Materials Science Lecturer: Shenhua SONG (宋申華 ) Assessment Structure ? Written examination (50%) ? Oral presentation (20%, any topics in Chapter 7 – Mechanical Properties, 4 students as a group, 15 minutes) ? Report (20%, any topics in materials science and engineering) ? Assignment (10%) Outline ? Introduction ? Atomic bonding in solids ? Structures of metals and ceramics ? Imperfections in solids ? Diffusion ? Mechanical properties ? Deformation and strengthening mechanisms ? Failure ? Phase diagrams and phase transformations ? Types and applications of materials Chapter One Introduction ? Materials science and engineering (MSE) ? Why study materials science and engineering ? Classification of materials ? Advanced materials What is materials science and engineering ? Materials science Concerned with the relationship between position, structure and properties of materials ?
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