Development of Gd-Si-O dispersed 316L stainless steel for improving neutron shielding performance
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...
| Main Authors: | , , , , , |
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| Format: | Article |
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Elsevier
2020-05-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179120300156 |
| _version_ | 1818576977816190976 |
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| author | Xinyi Yang Liangliang Song Bo Chang Qi Yang Xiaodong Mao Qunying Huang |
| author_facet | Xinyi Yang Liangliang Song Bo Chang Qi Yang Xiaodong Mao Qunying Huang |
| author_sort | Xinyi Yang |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-16T06:22:36Z |
| format | Article |
| id | doaj.art-f9b07639a42748c2bd8d94201eac2dae |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-12-16T06:22:36Z |
| publishDate | 2020-05-01 |
| publisher | Elsevier |
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| series | Nuclear Materials and Energy |
| spelling | doaj.art-f9b07639a42748c2bd8d94201eac2dae2022-12-21T22:41:05ZengElsevierNuclear Materials and Energy2352-17912020-05-0123Development of Gd-Si-O dispersed 316L stainless steel for improving neutron shielding performanceXinyi Yang0Liangliang Song1Bo Chang2Qi Yang3Xiaodong Mao4Qunying Huang5Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, China; University of Science and Technology of China, Hefei, Anhui 230026, ChinaKey Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, China; Corresponding authors.Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, ChinaKey Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, ChinaKey Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, China; Corresponding authors.Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, ChinaThe 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.http://www.sciencedirect.com/science/article/pii/S2352179120300156Neutron shielding alloyGadoliniumMechanical alloyingPrecipitation |
| spellingShingle | Xinyi Yang Liangliang Song Bo Chang Qi Yang Xiaodong Mao Qunying Huang Development of Gd-Si-O dispersed 316L stainless steel for improving neutron shielding performance Nuclear Materials and Energy Neutron shielding alloy Gadolinium Mechanical alloying Precipitation |
| title | Development of Gd-Si-O dispersed 316L stainless steel for improving neutron shielding performance |
| title_full | Development of Gd-Si-O dispersed 316L stainless steel for improving neutron shielding performance |
| title_fullStr | Development of Gd-Si-O dispersed 316L stainless steel for improving neutron shielding performance |
| title_full_unstemmed | Development of Gd-Si-O dispersed 316L stainless steel for improving neutron shielding performance |
| title_short | Development of Gd-Si-O dispersed 316L stainless steel for improving neutron shielding performance |
| title_sort | development of gd si o dispersed 316l stainless steel for improving neutron shielding performance |
| topic | Neutron shielding alloy Gadolinium Mechanical alloying Precipitation |
| url | http://www.sciencedirect.com/science/article/pii/S2352179120300156 |
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