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3.Metal and ceramic structures - MSE 280 Introduction to...

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8/25/2008 1 MSE 280: Introduction to Engineering Materials Reading: Chapter 3 Part 1 Metal and Ceramic Structures Defining ordered atoms in crystalline solids. Unit cells, unit vectors, Coordinates, directions, planes, close packing… Densities: Crystal density, Line density, Planar density Crystal symmetry and families Crystallography MSE280 © 2007, 2008 Moonsub Shim, University of Illinois 1 Part 2 Ionic crystals. Lattice energy. Silica & silicates. Carbon ENERGY AND PACKING Non dense, random packing Energy typical neighbor bond length Dense, regular packing r bond length typical neighbor bond energy Energy typical neighbor MSE280 © 2007, 2008 Moonsub Shim, University of Illinois 2 Dense, regular-packed structures tend to have lower energy. r bond length typical neighbor bond energy From Callister 6e resource CD.
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