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Unformatted text preview: at its melting point, T=2800 ° C. Its energy for the formation of one pair of defect is 6 eV. Assume n/N = exp (-Q/2kT). 1 eV = 1.602x10-19 J, k=13.81x10-24 J/K= 86.20x10-6 eV/K n/N = exp [- 6/(2x86.20 x10-6 x 3073)]= exp (-11.325)=1.2x10-5 3. A dislocation loop shown below was observed. Indicate the portions of edge dislocation, screw dislocation and mixed dislocation. edge edge Direction of Scre Mix Edg Edg Scre 4. Two dimensional crystals of bubbles are shown below. Identify an irregularity of this “crystal”, which appears to be an extra-half plane....
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- Spring '08
- Crystallographic defect, Crystallographic defects, predominant point defect