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81610 - Intro to Materials Science and Engineering Types of...

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Intro to Materials Science and Engineering Types of Materials (Usually 5 groups): Metals Ceramics Polymers Semi-Conductors Composites 1. Metals a. Made of metallic elements, crystalline (atoms are organized in reasonable fashion), high strength and stiffness, lustrous, good electrical and thermal conductivity, shock resistant, often used in alloys (combination of more than one element). b. Common Examples: i. Steel, cast iron (alloys of iron and carbon) ii. Solder Pb and Sn or Sn - , Sb - , Ag iii. Brass (copper and Zinc) iv. Bronze (copper and tin) v. Alluminum, Tin, Nickel, and all their alloys. c. Typical Applications: i. Structural (beams, rebar) ii. Automobile Components iii. Electrical Wires 2. Ceramics a. Compounds of metallic and non metallic elements. b. Examples: i. Oxides, Carbides, and Nitrides c. They are crystalline AND amorphous (random arrangement of atoms) types. d. The amorphous arrangement is glass.
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e. Low electric and thermal conductivity (uses as insulators) f. Hard but brittle g. Excellent resistant to high temps.
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