Role of ion species in radiation effects of Lu2Ti2O7 pyrochlore
| Autor: | Yongqiang Wang, Dongyan Yang, Zhiguang Wang, Pengcheng Mu, Yuhong Li, Y. Xia, Jinjie Liang, J. Wen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Diffraction Materials science Mechanical Engineering Radiochemistry Metals and Alloys Pyrochlore Analytical chemistry 02 engineering and technology engineering.material Radiation 021001 nanoscience & nanotechnology 01 natural sciences Ion Mechanics of Materials Lattice (order) 0103 physical sciences Materials Chemistry engineering medicine Irradiation Crystallite Swelling medicine.symptom 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 693:565-572 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.09.227 |
| Popis: | In an attempt to investigate the role of ion species in the radiation effects of pyrochlores, polycrystalline Lu 2 Ti 2 O 7 samples, prepared through a standard solid state process, were irradiated with three different ion beams: 400 keV Ne 2+ , 2.7 MeV Ar 11+ and 6.5 MeV Xe 26+ . To characterize the damaged layers in Lu 2 Ti 2 O 7 , the grazing incident X-ray diffraction technique was applied. All the three irradiations induce significant amorphization processes and lattice swelling in Lu 2 Ti 2 O 7 . However, when the ion fluence is converted to a standard dose in dpa, the radiation effects of Lu 2 Ti 2 O 7 show a great dependence on the implanted ion species. The threshold amorphization dose decreases with increasing ion mass and energy. Besides, the amorphization rate, as well as lattice swelling rate, increases with increasing ion mass and energy. That is, the Lu 2 Ti 2 O 7 pyrochlore is more susceptible to amorphization and lattice swelling under heavier ion irradiation. These results are then discussed in the framework of defect configuration and the density of collision cascades based on Monte Carlo simulations. |
| Databáze: | OpenAIRE |
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