Chapter 4.1

Chapter 4.1 - Chapter Outline Crystals are like people, it...

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1 MSE 2090: Introduction to Materials Science Chapter 4, Defects in crystals “Crystals are like people, it is the defects in them which tend to make them interesting!” - Colin Humphreys. Defects in Solids ¾ 0D, Point defects 9 vacancies 9 interstitials 9 impurities, weight and atomic composition ¾ 1D, Dislocations 9 edge 9 screw ¾ 2D, Grain boundaries 9 tilt 9 twist ¾ 3D, Bulk or Volume defects ¾ Atomic vibrations Optional reading (Parts that are not covered / not tested): 4.9 – 4.10 Microscopy 4.11 Grain size determination Chapter Outline
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MSE 2090: Introduction to Materials Science Chapter 4, Defects in crystals Why are defects important? Defects have a profound impact on the various properties of materials: Bonding + Crystal Structure + Defects Properties Production of advanced semiconductor devices require not only a rather perfect Si crystal as starting material, but also involve introduction of specific defects in small areas of the sample. Defects are responsible for color (& price) of a diamond
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This note was uploaded on 02/14/2012 for the course MSE 2090 taught by Professor Leoindzhiglei during the Fall '10 term at UVA.

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Chapter 4.1 - Chapter Outline Crystals are like people, it...

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