采用电子扫描显微镜（SEM）表征UN/U₃Si₂(30wt%)复合芯块的微观形貌，结果表明，UN/U₃Si₂(30wt%)复合芯块中的U₃Si₂相具有网络状结构特征，UN相则具有孤岛状结构特征，并且，U₃Si₂相分布在UN基体中。结合元素分布图可知，UN/U₃Si₂(30wt%)复合芯块内部还含有少量的UO₂杂质相，这些杂质相同样弥散分布在UN基体中。

The microscopic morphology of the UN/U₃Si₂(30wt%) composite pellets was characterized by electron scanning microscopy (SEM). The results show that the U₃Si₂ phase in the pellet possesses a network-like structural feature, while the UN phase shows an island-like structural feature. Furthermore, the U₃Si₂ phase is distributed in the UN matrix. Combined with the elemental distribution mapping, it can be seen that the UN/U₃Si₂(30wt%) composite pellet also contains a small amount of UO₂ impurity phases, which phases are also diffusely distributed in the UN matrix.