MAT_101_Summer08Lecture_1

MAT_101_Summer08Lecture_1 - What is Materials...

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Unformatted text preview: What is Materials Science/Engineering? Processing Structure Properties Materials ¡ Ceramics ¡ Metals ¡ Polymers ¡ Semiconductors ¡ Composites ¡ Bonding ¡ Order/disorder ¡ Atomic arrangements ¡ Defects ¡ Mechanical ¡ Electrical ¡ Magnetic ¡ Environmental ¡ Optical ¡ Thermal ¡ … Length scales: atom (Å) -> ~ mm What is Materials Science? ¡ Materials Structure m 10-18 10-14 10-10 10-6 10-2 10 2 10 4 1 m Philosophy Nuclear Physics Materials Science Structural Engineering Solid State Physics 1 Turbine blade Crystallites “grains” Atom arrangements in a crystal nm - mm m - nm CHAPTER 1: MATERIALS SCIENCE & ENGINEERING Materials are... engineered structures ...not blackboxes! Structure ...has many dimensions... Structural feature Dimension (m) atomic bonding missing/extra atoms crystals (ordered atoms) second phase particles crystal texturing < 10-10 10-10 10-8-10-1 10-8-10-4 > 10-6 1 Materials Structure - Course Outline 1. Bonding 2. The science of describing crystalline materials: Crystallography 3. Defects in materials Aluminum - metallic Sodium chloride (salt) - ionic 1 nm “seeing atom arrangements in crystals”: transmission electron microscopy of thin Sc 2 O 3 foil Structure, Processing, & Properties ex: hardness vs structure of steel •...
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MAT_101_Summer08Lecture_1 - What is Materials...

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