Lect17_notes

5 crystallographic directions a vector of convenient

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Unformatted text preview: ordinates! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 17 ! 5 Crystallographic Directions! ! ! •  A vector of convenient length is positioned such that it passes through the origin of unit cell.! ! •  The length of the vector projections on each of the three axes is determined (measured in terms of the unit cell dimensions a, b, and c ).! •  These numbers are multiplied or divided by common factor to reduce them to the smallest set of integers. ! •  The three indices are enclosed in square brackets (no commas) giving:! [ u v w ] Example! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 17 ! 6 Representation of a Series of Parallel Planes! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 17 ! 7 FCC Crystals oriented to Look Parallel to Various Planes! (100) (111) (110) (510) CBEMS 164 – XRD, SEM & Microanalysis: Lecture 17 ! 8 Cystallographic Texture! The OIM technique is really a new type of microscopy used to probe the local microstructure in polycrystalline materials. Polycrystalline materials are rich in their diversity, and no single type of micros...
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This note was uploaded on 01/16/2014 for the course CBEMS 164 taught by Professor Porter,j during the Fall '08 term at UC Irvine.

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