ISSN:
1432-0630
Keywords:
66.30.-h
;
61.40.Df
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract Diffusion rates (D) of Au in two amorphous alloys, Fe80B20 and Fe82B18, and of Cu in amorphous Fe82B18 alloy were measured in the temperature range 546–645 K by using the technique of Rutherford backscattering spectrometry (RBS) and Auger electron spectroscopy (AES), respectively. The diffusion of Au was found to be ∼3 to 6 times faster in Fe80B20 than in Fe82B18, though both the alloys had almost similar crystallization temperatures. The observed differences in the diffusion rates corroborate the fact that Fe80B20 has a more open structure than Fe82B18 as revealed from the reported values of the metal packing fractions of these two alloys. Also, the diffusivities of smaller sized Cu atoms (radius: 0.128 nm) were found to be higher by more than an order of magnitude than those of larger sized Au atoms (radius: 0.146 nm), suggesting a dependence ofD on the size of the diffusing species.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00615007
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