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The burgers vector for frank partial dislocation is equal to ___________ (Lattice parameter is ao) b) ao/2 c) ao/3 d) ao/3

The burgers vector for frank partial dislocation is equal to ___________ (Lattice parameter is ao) b) ao/2 c) ao/3 d) ao/3 Correct Answer 100

The partial dislocation can exist in the FCC on (111) lattice plane. An edge dislocation is formed in this region with a Burgers vector (a0/3) . This is called a Frank partial dislocation. Its Burgers vector is perpendicular to the central stacking fault. Since glide must be restricted to the plane of the stacking fault and the Burgers vector is normal to this plane, the Frank partial dislocation cannot move by glide. For this reason, it Is called a sessile dislocation.

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