Nanometer-scale tunnel formation in metallic glass by helium ion irradiation
- Department of Nuclear Engineering, Texas A and M University, College Station, Texas 77843 (United States)
- Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401 (United States)
- Materials Science and Engineering Program, Texas A and M University, College Station, Texas 77843 (United States)
- CHD-Fab, Freescale Semiconductor, Inc., Chandler, Arizona 85224 (United States)
- Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
We have shown that upon high fluence helium ion irradiation, metallic glass Cu{sub 50}Zr{sub 45}Ti{sub 5} becomes highly porous at the depth of the helium projected range. The resulting porous region is characterized by the formation of a tunnel like structure and self-linkage of nanometer size gas bubbles. Furthermore, the irradiation leads to the formation of nanometer size Cu{sub x}Zr{sub y} crystals that are randomly distributed. The results of this study indicate that the He-filled bubbles have attractive interactions and experience considerable mobility. Movement of the bubbles is believed to be assisted by ballistic collisions.
- OSTI ID:
- 22089311
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 4 Vol. 101; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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