In general diffusion is faster for A less closely packed str

In general diffusion is faster for

A. less closely packed structure

B. higher melting points solids

C. substitutional relative to interstitial diffusion

D. all of the above

Solution

DIFFUSION FASTER FOR

- open crystal structures

- lower melting point temperature materials

- smaller diffusion atoms

- lower density materials

- cations

DIFFUSION IS SLOWER FOR

- close packed structures

-higher melting point temp materials

- anions

- high density materials

therefore option A is correct

substitutional diffusion is much slower than that of interstitial