The self-diffusivity of 54Mn in single icosahedral quasi-crystals was studied by using a precision grinding technique at temperatures ranging from 870 to 1093K. It was found that the results (table 30) could be described by an Arrhenius expression of the form:

D (m2/s) = 0.00034 exp[-180.8(kJ/mol)/RT]

W.Sprengel, T.A.Lograsso, H.Nakajima: Physical Review Letters, 1996, 77[26], 5233-6

 

 

 

Table 30

Diffusivity of Mn in Al70Pd21.5Mn8.5

 

Temperature (K)

D (m2/s)

1093

7.71 x 10-13

1022

1.77 x 10-13

972

6.81 x 10-14

923

2.10 x 10-14

870

4.31 x 10-15