All Physics Faculty Publications

Document Type

Article

Journal/Book Title/Conference

Materials Research Society Symposium Proceedings

Volume

235

Publication Date

1992

First Page

503

Last Page

503

DOI

10.1557/PROC-235-503

Abstract

We have continued to investigate ion-beam mixing in bilay-er targets irradiated by 2-MeV He+ microbeams at room temperature. Although we have previously reported a linear dependence of interface width on dose for Cu/Al targets 1, more extensive results have not supported this conclusion, within statistical uncertainty, it appears that the interface width in Cu/Al (1) is proportional to the square root of dose, at constant dose rate, (2) is larger in Al than in Cu, for the same dose, (3) is proportional to the 1/4 power of dose rate, and (4) is absent at liquid nitrogen temperature. Calculations of the expected interface growth rate from a radiation-enhanced diffusion model have provided order-of-magnitude agreement with observed rates. Additionally, intermixing of Cu and Al outside the damaged area may indicate significant transverse diffusion of vacancies.

Comments

Published by Materials Research Society in Materials Research Society Proceedings. Publisher PDF is available through link above.

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