The low solubility of gadolinium (Gd) limits its application in iron-based neutron shielding alloys. In this study, a high content of Gd up to 7.87 wt.% was added into 316L stainless steel by mechanical alloying (MA) of Gd₂O₃ with 316L powder. Neutronics calculation results showed that the shielding efficiency of 0.2 mm thick 7.87 wt.% Gd-316L alloy was equivalent to that of 33 mm thick 316L for thermal neutrons. Microstructure analysis indicated that Gd-Si-O particles with an average size of 12.5 nm were uniformly dispersed in the matrix. It revealed that Gd₂O₃ dissolved into the 316L matrix during MA and re-precipitated at around 780 °C as Gd₂SiO₅ by XRD and TG-DSC. This study provides a novel Gd-containing alloy designed to achieve integration of structural alloys with good neutron shielding function for future application.

solubility（Gd）的低溶解度限制了其在铁基中子屏蔽合金中的应用。在这项研究中，通过将Gd ₂ O ₃与316L粉末机械合金化（MA），将高达7.87 wt。％的高含量的Gd添加到316L不锈钢中。中子学计算结果表明，0.2 mm厚7.87 wt。％Gd-316L合金的屏蔽效率与热中子的33 mm厚316L等效。显微组织分析表明，平均粒径为12.5 nm的Gd-Si-O颗粒均匀地分散在基体中。结果表明，在MA中，Gd ₂ O ₃溶解到316L基质中，并在780°C左右重新沉淀为Gd ₂ SiO _5。由XRD和TG-DSC提供。这项研究提供了一种新型的含Gd合金，旨在实现具有良好中子屏蔽功能的结构合金的集成，以备将来应用。