The Burger\'s vector of a screw dislocation is perpendicular to the dislocation

Question

The Burger's vector of a screw dislocation is perpendicular to the dislocation line. ____ Metallic bonding is directional. ____ Domain walls are area defects in ferroelectric materials. ____ Vacancy diffusion is normally more rapid than interstitial diffusion. _____ Interstitial atoms are point defects. _____ The plane (010) in the cubic unit cells is parallel to y axis. _____ The diffusion of C in BCC iron is interstitial diffusion while the diffusion of C in iron is vacancy diffusion. There are 16 Bravais lattices to describe the crystal unit cell.

Explanation / Answer

1=False (Because It is parallel)

2=False (Because it is non-directional)

3=False (Because it is point defects)

4=False ( because interstitial diffusion is more rapid)

5=True

6= False ( Because perpendicular to y-axis)

7= False

8= False (bacause 14 Bravais lattices)

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