Effects of ion irradiation in metallic glasses |
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| Authors: | Jesse Carter EG Fu G Bassiri BM Dvorak N David Theodore Guoqiang Xie DA Lucca Michael Martin Mark Hollander Xinghang Zhang Lin Shao |
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| Affiliation: | 1. Department of Nuclear Engineering, Texas A&M University, 129 Zachry, 3133 TAMU, College Station, TX 77843, USA;2. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA;3. School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078, USA;4. Silicon Technology Solutions, Freescale Semiconductor Inc., Tempe, AZ 85284, USA;5. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan |
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| Abstract: | Application of metallic glasses as structural materials has been limited by their poor ductility. To overcome brittle failure, nanocrystals are intentionally introduced to stabilize the glasses. In this study, we report on the application of ion irradiation to induce nanocrystalization in a Cu50Zr45Ti5 (CZT) alloy. Transmission electron microcopy, microindentation and nanoindentation have been used to characterize the CZT alloy irradiated with 140 keV He ions at room temperature. Hardness enhancement was observed near the projected range of the He ions, coinciding with the formation of nanocrystals. Such microstructural changes, however, were not observed in the near surface region, where the electronic stopping process is dominant. |
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