The dense Al₂O₃-ZrO₂ ceramic composite prepared by spark plasma sintering was irradiated by 500 keV He ions with different fluences and temperatures. The microstructural evolution and mechanical properties were investigated. The results showed that peak broadening and shifts at RT revealed by GIXRD and Raman are associated with damage induced microstrain and formation of point defects. The recovery at 500 °C suggested the reduction of irradiation induced damage. Compared with α-Al₂O₃, t-ZrO₂ exhibited a reverse trend in lattice parameters change and lattice expansion. Many helium bubbles with oblate and ribbon-like shape were mainly formed in α-Al₂O₃ grains at He concentration peak at 1.0 × 10¹⁷ ions/cm². With increasing of fluence at RT, ribbon-like helium bubbles developed into microcracks at 4.0 × 10¹⁷ ions/cm². Though evident structural changes, no full amorphization was observed at 4.0 × 10¹⁷ ions/cm². Formation of ribbon-like bubbles and microcracks is the main mechanism for degradation of mechanical properties of irradiated Al₂O₃-ZrO₂ composite.

用电火花等离子烧结法制备的致密Al ₂ O ₃ -ZrO ₂陶瓷复合材料，用不同能量密度和温度的500 keV He离子辐照。研究了组织演变和力学性能。结果表明，GIXRD和Raman揭示的RT峰展宽和位移与损伤诱导的微应变和点缺陷的形成有关。500℃下的恢复表明减少了辐射诱导的损害。用的α-Al相比₂ ö ₃，叔的ZrO ₂显示出在晶格参数改变和晶格膨胀反向趋势。许多用氦和扁圆状带状主要形成于α-Al系泡₂ öHe浓度下的_3个晶粒的峰值为1.0×10 ¹⁷ ions / cm ²。随着室温下注量的增加，带状氦气气泡以4.0×10 ¹⁷ ions / cm ^2的浓度发展为微裂纹。尽管结构发生了明显变化，但在4.0×10 ¹⁷离子/ cm ^2下未观察到完全非晶化。带状气泡和微裂纹的形成是降低辐照后的Al ₂ O ₃ -ZrO ₂复合材料力学性能的主要机理。