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e4511lecture-2 - The Essence of Materials Science The field...

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J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring , 2011 The field can be summarized in two sentences: Properties <= composition + microstructure Microstructure <= composition + processing Composition = kind and fraction of atoms present Microstructure = How those atoms are arranged Microstructure is not only essential to understanding properties It is often much more important than composition The Essence of Materials Science
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J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring , 2011 Outline of the Course Composition = atoms or molecules present Microstructure = location of atoms or molecules How can we locate 10 23 atoms? Use reference states: Crystal (periodic distribution) + defects Glass (random distribution) + defects Properties Thermochemical (response to heat or environment) Electromagnetic (response to electromagnetic fields) Mechanical (response to mechanical forces)
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J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring , 2011 Bonding Solids are made of atoms or molecules These stick together – “ bonding Understanding bonding is fundamental – Microstructure – Properties Some important properties are determined by the nature of bonding alone
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J.W. Morris, Jr.
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