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
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.
Recommended Citation
J.B. Davis+, R.E. Benenson, and D. Peak, "Analysis of Experiments in Helium Microbeam Mixing," Materials Research Society Symposium Proceedings 235, 503 (1992).
Comments
Published by Materials Research Society in Materials Research Society Proceedings. Publisher PDF is available through link above.