Structural Distortion and Defects in Ti₃AlC₂ irradiated by Fe and He Ions

【摘要】 Ti₃AlC₂ samples are irradiated in advance by 3.5 MeV Fe-ion to the fluence of 1.0×10¹⁶ ion/cm²,and then are implanted by 500 keV He-ion with the fluence of 1.0×10¹⁷ ion/cm² at room temperature.The irradiated samples are investigated by grazing incidence x-ray diffraction（GIXRD） and transmission electron microscopy（TEM）.GIXRD results show serious structural distortion,but without amorphization in the irradiated samples.Fe-ion irradiation and He-ion implantation create much more serious structural distortion than single Fe-ion irradiation.TEM results reveal that there are a large number of defect clusters in the damage region,and dense spherical He bubbles appear in the He depositional region.It seems that the pre-damage does not influence the growth of He bubbles,but He-ion implantation influences the pre-created defect configurations.更多还原

【Abstract】 Ti₃AlC₂ samples are irradiated in advance by 3.5 MeV Fe-ion to the fluence of 1.0×10¹⁶ ion/cm²,and then are implanted by 500 keV He-ion with the fluence of 1.0×10¹⁷ ion/cm² at room temperature.The irradiated samples are investigated by grazing incidence x-ray diffraction（GIXRD） and transmission electron microscopy（TEM）.GIXRD results show serious structural distortion,but without amorphization in the irradiated samples.Fe-ion irradiation and He-ion implantation create much more serious structural distortion than single Fe-ion irradiation.TEM results reveal that there are a large number of defect clusters in the damage region,and dense spherical He bubbles appear in the He depositional region.It seems that the pre-damage does not influence the growth of He bubbles,but He-ion implantation influences the pre-created defect configurations.更多还原