We report microstructural evaluation in proton-irradiated SiC_f/SiC up to a fluence level of 10¹⁸ p⁺/m² (E = 20 MeV) performed at the Korea Multi-purpose Accelerator Complex (KOMAC). To fabricate the SiC_f/SiC, a SiC-based matrix with two different sintering additives, Sc-nitrate and Al₂O₃-Y₂O₃, were infiltrated into the Tyranno^® SiC preform by electrophoretic deposition and subsequent hot pressing. Scanning (SEM) and high resolution (HREM) electron microscopy was used to probe crack formation, pore generation and surface amorphization upon irradiation. SiC matrix was comparatively more crack-resistant in the SiC_f/SiC with Sc-nitrate than that with Al₂O₃-Y₂O₃. Subsurface porosity evolved in the form of continuous bands for Al₂O₃-Y₂O₃ and discrete pockets for Sc-nitrate additives. Selective leaching of Si from the grain surface leads to the formation of a graded structure and surface amorphization. Irradiation-induced roughness on the fibers facilitates easy debonding at the SiC_f-PyC_coating interface but no significant changes in the flexural behavior were observed.

我们报告了在韩国多功能加速器联合体（KOMAC）进行的质子辐照SiC _f / SiC达10 ¹⁸  p ⁺ / m ²（E = 20 MeV）的注量水平的显微组织评估。为了制造所述SiC _˚F /碳化硅，一SiC基矩阵具有两个不同的烧结添加剂，SC-硝酸盐和Al ₂ ö ₃ -Y ₂ ö ₃，被渗透到TYRANNO ^®SiC预制棒通过电泳沉积和随后的热压制成。扫描（SEM）和高分辨率（HREM）电子显微镜用于探测照射后的裂纹形成，孔生成和表面非晶化。相对于Al ₂ O ₃ -Y ₂ O ₃，Sc-硝酸盐的SiC _f / SiC SiC基质具有更高的抗裂性。Al ₂ O ₃ -Y ₂ O ₃的连续带形式形成了地下孔隙度和用于Sc硝酸盐添加剂的离散袋。Si从晶粒表面的选择性浸出导致渐变结构的形成和表面非晶化。纤维上的辐照引起的粗糙度有助于在SiC _f -PyC_涂层界面处轻松剥离，但未观察到弯曲行为的明显变化。