MCE 230_F10_ lec_9 - MCE 230 Materials Science Fall 2010...

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MCE 230 Materials Science Fall 2010 Lecture - 9
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Crystalline Structure
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Family of planes: are planes that are crystollographically equivalent ( having the same atomic packing) and Family of planes is represented by {hkl} Example: for cubic systems Equivalent Planes
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For cubic systems; planes having the same indices irrespective of the order or signs are equivalent ( this does not apply for other crystal systems
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Unformatted text preview: ) . • A direction having the same indices of a plane is normal to it • Example: [101] is normal to (101) Equivalent Planes • Linear density (LD): Ex: Find the linear density of Aluminum in [110] direction (a = 0.405 nm ) Linear Density a [110] • Planner density (PD) Ex: Find the planer density of (100) plane of a BCC structure ( in terms of R) Planner Density...
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