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Unformatted text preview: This ABA arrangement represents the hexagonal close packed structure. Now place layer threes peaks within layer twos valleys, such that layer three is not directly above layer one. This ABC arrangement represents the face-centered cubic structure. Part 2: Place the Petri dish full of Bbs, which represent atoms, on the table. Shake the Bbs around to simulate the heating of atoms in a metallic substance. Gradually slow the movement of the Bbs to simulate crystal formation. Notice the arrangement of the Bbs and the inconsistencies in their formation. These inconsistencies in the crystalline formation lines are called dislocations, and they cause free spaces called vacancies in the atomic structure....
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This note was uploaded on 09/29/2008 for the course ENGR 30014 taught by Professor Kolesar during the Spring '08 term at TCU.
- Spring '08