| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments III
|
| Presentation Title |
Radiation Resistance of Metallic Glass Coatings of Crystalline Nanostructures |
| Author(s) |
Mehrdad Kiani, Khalid Hattar, Wendy X Gu |
| On-Site Speaker (Planned) |
Mehrdad Kiani |
| Abstract Scope |
In radiation environments, crystalline nanostructures suffer from enhanced surface damage and sputtering due to their high surface area to volume ratio. In contrast, ultrathin metallic glass films have been shown to be highly resistant to crystallization and surface damage. Here, we use in situ TEM ion irradiation to probe whether a metallic glass coating can mitigate sputtering and structural damage of crystalline nanostructures. Colloidally synthesized Au nanocubes with a Ni-B metallic glass coating were bombarded with 2.8 MeV Au4+ ions and morphological changes were tracked as a function of fluence. For bare Au nanocubes, sputtering and surface roughening began at 4 × 1012 ions/cm2 (0.04 dpa) whereas coated Au nanocubes showed minimal changes at a fluence of 1.9 × 1013 ions/cm2 (0.2 dpa). There was no intermixing at the metallic glass-Au interface and the coating remained amorphous for all conditions. |