ch2-S10 - Atomic Structure and Interatomic Bonding...

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MY2100 – Ch 2, Slide 1 Atomic Structure and Interatomic Bonding structure processing properties Performance ISSUES TO BE ADDRESSED . .. What promotes bonding? What types of bonds are there? What properties are inferred from bonding?
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MY2100 – Ch 2, Slide 2 Length scales meters 10 -9 10 -6 10 -3 1 atoms crystals microstructures, phases, defects structural engineering components 10 3 (nm) ( μ m) (mm) (km) (m) human hair diameter metal line width in pentium chip 1 inch Structure of a material relates to the arrangement of its internal components and occurs at various length scales.
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MY2100 – Ch 2, Slide 3 Basic Length Scales of Structures We will talk about structures in MY2100 in the order of increasing length scales: Atomic Structure: Nanometer (10 -9 meter) scale What elements are present? What type of chemical bonding exists between atoms? Crystal/molecular: Slightly larger but still on the Nanometer scale What is the basic building block of solids? Microstructure: Micron (10 -6 meter) scale How large are individual phases? What shape do individual phases exhibit? How are phases configured spatially with respect to each other?
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MY2100 – Ch 2, Slide 4 Influence of structure Atomic structure strongly affects: Physical properties (electrical conductivity, specific heat, optical properties, semiconducting properties, chemical reactivity, etc.) We will briefly review only those aspects of atomic structure that are related to bonding. Crystal and microstructure strongly affect: Mechanical properties (strength, toughness, etc) However, each level of structure can have smaller effects on all properties of importance.
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MY2100 – Ch 2, Slide 5 have discrete energy states tend to occupy lowest available energy state. 3 n=1 n=2 n=3 n=4 1s 2s 3s 2p 3p 4s 4p 3d Electrons. ..
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This note was uploaded on 03/16/2011 for the course MY 2100 taught by Professor Staff during the Spring '08 term at Michigan Technological University.

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ch2-S10 - Atomic Structure and Interatomic Bonding...

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