SiC_f/SiC composites containing three different types of sintering additives viz. Sc-nitrate, Al₂O₃-Sc₂O₃, and Al₂O₃-Y₂O₃, were subjected to ion irradiation using 0.2 MeV H⁺ ions with a fluence of 3 × 10²⁰ ions/m² at room temperature. Although all composites showed volumetric swelling upon ion irradiation, SiC_f/SiC with Sc-nitrate showed the smallest change followed by those with the Al₂O₃-Sc₂O₃ and Al₂O₃-Y₂O₃ additives. In particular, SiC_f/SiC containing the conventional Al₂O₃-Y₂O₃ additive revealed significant microstructural changes, such as surface roughening and the formation of cracks and voids, resulting in reduced fiber pullout upon irradiation. On the other hand, the SiC_f/SiC with Sc-nitrate showed the highest resistance against ion irradiation without showing any macroscopic changes in surface morphology and mechanical strength, indicating the importance of the sintering additive in NITE-based SiC_f/SiC for nuclear structural applications.

包含三种不同类型烧结添加剂的SiC _f / SiC复合材料。使用0.2 MeV H ⁺离子，以3×10 ²⁰ ions / m ²的通量，在室温下对Sc-硝酸盐，Al ₂ O ₃ -Sc ₂ O ₃和Al ₂ O ₃ -Y ₂ O ₃进行离子照射。温度。尽管所有复合材料在离子辐照下均显示出体积溶胀，但具有Sc-硝酸盐的SiC _f / SiC表现出最小的变化，其次是具有Al ₂ O ₃ -Sc ₂ O的复合材料。₃和Al ₂ O ₃ -Y ₂ O ₃添加剂。特别地，含有常规Al ₂ O ₃ -Y ₂ O ₃添加剂的SiC _f / SiC表现出显着的微观结构变化，例如表面粗糙和裂纹和空隙的形成，从而降低了辐照时纤维的拉拔。在另一方面，在SiC _˚F /碳化硅用SC-硝酸盐表现出对离子照射最高抗性而不显示在表面形态和机械强度的任何宏观的变化，指示所述烧结添加剂的基于NITE碳化硅的重要性_˚F/ SiC用于核结构。