Mobility of Ni versus Zr in an amorphous Ni-Zr alloy
- 24 February 1986
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 48 (8), 517-519
- https://doi.org/10.1063/1.96492
Abstract
A method for determining the dominant diffusing constituent in a binary amorphous alloy is demonstrated with the Ni-Zr system. Nickel is the dominant moving species in an amorphous Ni-Zr alloy near the a-Ni50Zr50 composition at 250 °C. In comparison to the Ni, the Zr has a negligible mobility under similar thermodynamic driving forces. Rutherford backscattering spectrometry is used to measure the change in the concentration of a thin film of Ni between thick amorphous layers. Based upon the change in the Ni profile, the diffusivity of Ni in an amorphous Ni-Zr alloy is between 1×10−17 and 1×10−16 cm2/s at 250 °C.Keywords
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