文档介绍：About this course (cont’d)
4. Course evaluation — How to assess the learning quality?
• Final exam — 70Inorganic mat.
/Ceramics
Soda-glass
Pyrex
Fe, Cu, Al, Ni, Au, Metals & Alloys
Steels, cast iron
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Materials family — classification (by use)
Materials
Structural materials
Functional materials
Magnetic materials
Optical materials
Electronic materials
Superconductive materials
:
Metallic materials
Plastic materials
Wood structural materials
Other structural materials
:
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What is a metal ?
What is a ceramic ? — Natural & synthetic rock: hard, brittle & heat-resistant
What is a polymer ?— The word polymer literally means "many parts" Better know as “plastics” by general public
The great majority of elements in the periodic table are metals.
A metal has a particular type of bonding known as metallic
bonding (as distinct from ionic bonding and covalent bonding).
Metals tend to be ductile strong shiny materials that corrode easily
What is a composite material ? — An engineering material which consists of more than one material type
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1. Macrostructure (宏观结构) — We can see it by our eyes:
>100 m.
2. Microstructure (微观结构) — We can only see it by a
microscope: ~ 1 m.
3. Nano-structure (纳米结构) — Only see it by special tools
(AFM & HRTEM): ~ < 1000 nm.
4. Short- & long range atomic arrangement (短程和长程有
序原子排列) — We can only see it by special tools: ~100 nm
5. Atomic structure — Nearly can not see it: < 1 nm
Five levels to understand & examine the structure of materials
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Structure of “Metal & Alloys” — Part 1
Chapt. 1 Introduction to Materials Sci. & Eng.
Chapt. 2 Atomic Structure
Chapt. 3 Atomic & Ionic Arrangements
Chapt. 4 Imperfection in A. & I. Arrangements
Chapt. 5 Atom & Ion Movements