Swift heavy ion induced surface and microstructural evolution in metallic glass thin films
Swift heavy ion induced changes in microstructure and surface morphology of vapor deposited Fe–Ni based metallic glass thin films have been investigated by using atomic force microscopy, X-ray diffraction and transmission electron microscopy. Ion beam irradiation was carried out at room temperature...
| Main Authors: | , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
|
| Online Access: | https://hdl.handle.net/10356/100271 http://hdl.handle.net/10220/17844 |
| _version_ | 1811678232296030208 |
|---|---|
| author | Thomas, Hysen Thomas, Senoy Avasthi, D. K. Ramanujan, Raju V. Al-Harthi, S. H. Anantharaman, M. R. Al-Omari, I. A. |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Thomas, Hysen Thomas, Senoy Avasthi, D. K. Ramanujan, Raju V. Al-Harthi, S. H. Anantharaman, M. R. Al-Omari, I. A. |
| author_sort | Thomas, Hysen |
| collection | NTU |
| description | Swift heavy ion induced changes in microstructure and surface morphology of vapor deposited Fe–Ni based metallic glass thin films have been investigated by using atomic force microscopy, X-ray diffraction and transmission electron microscopy. Ion beam irradiation was carried out at room temperature with 103 MeV Au9+ beam with fluences ranging from 3 × 1011 to 3 × 1013 ions/cm2. The atomic force microscopy images were subjected to power spectral density analysis and roughness analysis using an image analysis software. Clusters were found in the image of as-deposited samples, which indicates that the film growth is dominated by the island growth mode. As-deposited films were amorphous as evidenced from X-ray diffraction; however, high resolution transmission electron microscopy measurements revealed a short range atomic order in the samples with crystallites of size around 3 nm embedded in an amorphous matrix. X-ray diffraction pattern of the as-deposited films after irradiation does not show any appreciable changes, indicating that the passage of swift heavy ions stabilizes the short range atomic ordering, or even creates further amorphization. The crystallinity of the as-deposited Fe–Ni based films was improved by thermal annealing, and diffraction results indicated that ion beam irradiation on annealed samples results in grain fragmentation. On bombarding annealed films, the surface roughness of the films decreased initially, then, at higher fluences it increased. The observed change in surface morphology of the irradiated films is attributed to the interplay between ion induced sputtering, volume diffusion and surface diffusion. |
| first_indexed | 2024-10-01T02:49:59Z |
| format | Journal Article |
| id | ntu-10356/100271 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:49:59Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1002712020-06-01T10:26:35Z Swift heavy ion induced surface and microstructural evolution in metallic glass thin films Thomas, Hysen Thomas, Senoy Avasthi, D. K. Ramanujan, Raju V. Al-Harthi, S. H. Anantharaman, M. R. Al-Omari, I. A. School of Materials Science & Engineering Swift heavy ion induced changes in microstructure and surface morphology of vapor deposited Fe–Ni based metallic glass thin films have been investigated by using atomic force microscopy, X-ray diffraction and transmission electron microscopy. Ion beam irradiation was carried out at room temperature with 103 MeV Au9+ beam with fluences ranging from 3 × 1011 to 3 × 1013 ions/cm2. The atomic force microscopy images were subjected to power spectral density analysis and roughness analysis using an image analysis software. Clusters were found in the image of as-deposited samples, which indicates that the film growth is dominated by the island growth mode. As-deposited films were amorphous as evidenced from X-ray diffraction; however, high resolution transmission electron microscopy measurements revealed a short range atomic order in the samples with crystallites of size around 3 nm embedded in an amorphous matrix. X-ray diffraction pattern of the as-deposited films after irradiation does not show any appreciable changes, indicating that the passage of swift heavy ions stabilizes the short range atomic ordering, or even creates further amorphization. The crystallinity of the as-deposited Fe–Ni based films was improved by thermal annealing, and diffraction results indicated that ion beam irradiation on annealed samples results in grain fragmentation. On bombarding annealed films, the surface roughness of the films decreased initially, then, at higher fluences it increased. The observed change in surface morphology of the irradiated films is attributed to the interplay between ion induced sputtering, volume diffusion and surface diffusion. 2013-11-25T07:55:27Z 2019-12-06T20:19:25Z 2013-11-25T07:55:27Z 2019-12-06T20:19:25Z 2012 2012 Journal Article Thomas, H., Thomas, S., Ramanujan, R. V., Avasthi, D. K., Al-Omari, I. A., Al-Harthi, S., et al. (2012). Swift heavy ion induced surface and microstructural evolution in metallic glass thin films. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 287, 85-90. 0168-583X https://hdl.handle.net/10356/100271 http://hdl.handle.net/10220/17844 10.1016/j.nimb.2012.05.039 en Nuclear instruments and methods in physics research section B : beam interactions with materials and atoms |
| spellingShingle | Thomas, Hysen Thomas, Senoy Avasthi, D. K. Ramanujan, Raju V. Al-Harthi, S. H. Anantharaman, M. R. Al-Omari, I. A. Swift heavy ion induced surface and microstructural evolution in metallic glass thin films |
| title | Swift heavy ion induced surface and microstructural evolution in metallic glass thin films |
| title_full | Swift heavy ion induced surface and microstructural evolution in metallic glass thin films |
| title_fullStr | Swift heavy ion induced surface and microstructural evolution in metallic glass thin films |
| title_full_unstemmed | Swift heavy ion induced surface and microstructural evolution in metallic glass thin films |
| title_short | Swift heavy ion induced surface and microstructural evolution in metallic glass thin films |
| title_sort | swift heavy ion induced surface and microstructural evolution in metallic glass thin films |
| url | https://hdl.handle.net/10356/100271 http://hdl.handle.net/10220/17844 |
| work_keys_str_mv | AT thomashysen swiftheavyioninducedsurfaceandmicrostructuralevolutioninmetallicglassthinfilms AT thomassenoy swiftheavyioninducedsurfaceandmicrostructuralevolutioninmetallicglassthinfilms AT avasthidk swiftheavyioninducedsurfaceandmicrostructuralevolutioninmetallicglassthinfilms AT ramanujanrajuv swiftheavyioninducedsurfaceandmicrostructuralevolutioninmetallicglassthinfilms AT alharthish swiftheavyioninducedsurfaceandmicrostructuralevolutioninmetallicglassthinfilms AT anantharamanmr swiftheavyioninducedsurfaceandmicrostructuralevolutioninmetallicglassthinfilms AT alomariia swiftheavyioninducedsurfaceandmicrostructuralevolutioninmetallicglassthinfilms |