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Corrosion behavior of pure metals(Ni and Ti)and alloys(316H SS and GH3535)in liquid GaInSn

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Nuclear Science and Techniques 2024年第3期35卷 70-83页

作者： Jian-Hui Yu Hong-xia Xu xiang-xi ye Bin Leng Han-Xun Qiu xing-Tai Zhou School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

In this study,the interactions between a Ga-based liquid metal,GaInSn,and several metal materials,including pure metals(Ni and Ti)and alloys(316H stainless steel(SS)and GH3535),at 650℃were *** aim was to evaluate the corrosion performance and select a suitable candidate material for use as a molten salt manometer diaphragm in thermal energy storage *** results indicated that the alloys(316H SS and GH3535)exhibited less corrosion than pure metals(Ni and Ti)in liquid ***-rich binary intermetallic compounds were found to form on the surfaces of all the tested metal materials exposed to liquid GaInSn,as a result of the decomposition of liquid GaInSn and its reaction with the constituent elements of the metal *** corrosion mechanism for all the tested materials exposed to liquid GaInSn was also investigated and proposed,which may aid in selecting the optimal candidate material when liquid GaInSn is used as the pressure-sensing medium.

关键词： Metal materials Liquid GaInSn Corrosion Intermetallic compounds Thermal energy storage systems

Absorption effect of pure nickel on the corrosion behaviors of the GH3535 alloy in tellurium vapor

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Nuclear Science and Techniques 2021年第12期32卷 77-88页

作者： Kai Wang Li Jiang xiang-xi ye Jian-Ping Liang Chao-Wen Li Fang Liu Zhi-Jun Li School of Materials of Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

In this study,pure Ni was demonstrated to protect the GH3535 alloy from Te vapor corrosion because of its strong absorption *** Te corrosion of a single GH3535 alloy sample occurred in Te vapor at 700C,which manifested as complex surface corrosion products and deep intergranular ***,when pure Ni and the GH3535 alloy were put together in the vessel,the GH3535 alloy was completely protected from Te corrosion at the expense of the pure ***namic calculations proved that the preferential reaction between pure Ni and Te vapor reduced the activity of Te vapor considerably,preventing the corrosion of the GH3535 *** study reveals one potential approach for protecting the alloys used in molten-salt reactors from Te corrosion.

关键词： Tellurium corrosion Molten salt reactor GH3535 alloy Tellurides

Effect of Surface Decarburization on Corrosion Behavior of GH3535 Alloy in Molten Fluoride Salts

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Acta Metallurgica Sinica(English Letters) 2019年第3期32卷 401-412页

作者： Juan Hou Fen-Fen Han xiang-xi ye Bin Leng Min Liu Yan-Ling Lu xing-Tai Zhou Center for Thorium Molten Salts Reactor System Shanghai Institute of Applied Physics Chinese Academy of Sciences

Corrosion test of a Ni–16Mo–7Cr alloy with a decarburized layer was conducted in FLiNaK salt at 700 °C. A detailed microstructure study was performed to investigate the corrosion behavior and mechanisms. The results show that the Ferich layers were formed on the corroded alloys with and without decarburization. The surface decarburization had little influence on the corrosion resistance of the alloy, whereas it caused more M_2C carbide formation beneath the corrosion layer. That is attributed to the higher concentration of C gradient near the alloy surface, which was resulted from the increase in C content liberated from graphite crucible wall during the corrosion process.

关键词： Molten salt Corrosion Ni-based superalloys Decarburization

Welding solidification cracking susceptibility and behavior of a Ni-28W-6Cr alloy

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Journal of Materials Science & Technology 2019年第1期35卷 29-35页

作者： Shuangjian Chen xiang-xi ye D.K.L.Tsang Li Jiang Kun Yu Chaowen Li Zhijun Li Center for Thorium Molten Salts Reactor System Shanghai Institute of Applied Physics Chinese Academy of Sciences

Welding solidification cracking of alloys is associated with the range of solidification temperature that can be greatly affected by the amount of refractory metals and other additives. In this work, solidification cracking of Ni-28W-6Cr alloy with high W content was studied by gas tungsten arc welding, showing that the welding current, alloying elements and precipitates all affect the cracking susceptibility. The lengths of cracks increase linearly with the welding current in the range from 150 to 250 A. The relatively high cracking susceptibility is mainly attributed to the high content of Si, which tends to segregate with other elements including W, Cr, Mn as films or components with low melting point in the last solidification stage and weaken the binding force of grain boundaries. Moreover, the existence of precipitated continuous eutectic M_6C carbides in the grain boundaries also acts as nucleation sites of crack initiation, and the cracks often propagate along solidification grain boundary.

关键词： Welding solidification cracking susceptibility Ni-W-Cr alloy Chemical composition Grain boundaries

Microstructure and Its Influence on the Mechanical Properties of Ni–28W–6Cr-Based Alloy-Welded Joints by GTAW

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Acta Metallurgica Sinica(English Letters) 2019年第8期32卷 1032-1040页

作者： Shuang-Jian Chen xiang-xi ye D.K.L.Tsang Li Jiang Chao-Wen Li Kun Yu Zhi-Jun Li Center for Thorium Molten Salt Reactor System Shanghai Institute of Applied Physics Chinese Academy of Sciences

Microstructure and mechanical properties of Ni-28W-6Cr alloy-welded joints produced by gas tungsten arc welding were investigated in this *** showed that original fine-grain base metal near fusion line totally transformed into coarse heat affected zone after *** with different shapes were found in the weld metal and base metal,which all were determined as M6C *** comparison with carbides in base metal,M6C carbides in weld metal are rich in Si and Cr but deficient in ***,M6C carbides are extremely scarce and hard to be detected in weld *** tests show that the hardness value of weld metal is only about 60%of base metal;the yield strength and tensile strength of welded joint are much lower than those of base metal due to the absence of carbides in weld metal.

关键词： Welding Ni-W-Cr alloy Carbides Microstructure Hardness Tensile properties

Fine structure characterization of an explosively-welded GH3535/316H bimetallic plate interface

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International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1811-1820页

作者： Jia xiao Ming Li Jian-ping Liang Li Jiang De-jun Wang xiang-xi ye Ze-zhong Chen Na-xiu Wang Zhi-jun Li School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Dalian National Laboratory for Clean Energy Dalian 116023China Ministry of Ecology and Environment Beijing 100135China Institute of Zhejiang University-Quzhou Quzhou 324004China

An explosion-welded technology was induced to manufacture the GH3535/316H bimetallic plates to provide a more cost-effective structural material for ultrahigh temperature,molten salt thermal storage *** microstructure of the bonding interfaces were extensively investigated by scanning electron microscopy,energy dispersive spectrometry,and an electron probe *** bonding interface possessed a periodic,wavy morphology and was adorned by peninsula-or island-like transition *** higher magnification,a matrix recrystallization region,fine grain region,columnar grain region,equiaxed grain region,and shrinkage porosity were observed in the transition zones and surrounding *** backscattered diffraction demonstrated that the strain in the recrystallization region of the GH3535 matrix and transition zone was less than the *** concentration occurred at the interface and the solidification defects in the transition *** dislocation substructure in 316H near the interface was characterized by electron channeling contrast imaging.A dislocation network was formed in the grains of *** microhardness decreased as the distance from the welding interface increased and the lowest hardness was inside the transition zone.

关键词： GH3535/316H bimetallic plate ultrahigh temperature molten salt explosive welding interface structure dislocation substructure

Performance enhancement of triboelectric nanogenerator based on BaTiO_(3)-incorporated PVDF-HFP nanofibers for self-powered wearable sensors

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Science China(Technological Sciences) 2025年第1期68卷 262-269页

作者： Tianjie DENG xi ZHANG Zhuanqing YANG Gang xiang College of Physics Sichuan UniversityChengdu 610065China

The triboelectric nanogenerators(TENGs)based on polyvinylidene fluoride(PVDF)have attracted significant attention due to their high energy conversion efficiency and strong ***,the TENGs with higher electrical performance and stronger mechanical robustness are more *** this context,we design and fabricate TENGs based on nanofiber(NF)layer of Poly(vinylidene fluoridehexafluoropropylene)(PVDF-HFP),a copolymer of PVDF with better mechanical properties,in which the enhancement of dielectric constant and specific surface area is achieved by incorporation of BaTiO_(3) into PVDF-HFP NFs using *** results show that the TENGs demonstrates superior electrical *** optimized TENG exhibits an open-circuit voltage(VOC)of 432 V,a short-circuit current(ISC)of 44.2μA,and a maximum power density(Pd)of 2.25 W/m^(2).Practical applications of the optimized TENG are also demonstrated,including its use as power source,cylindrical rotating energy harvester and self-powered wearable *** findings give insights into the fabrication,performance and application of the TENGs based on BaTiO_(3)-incorporated PVDF-HFP NFs,offering promising solutions for energy harvesting and diverse applications.

关键词： PVDF-HFP BaTiO_(3) dielectric constant triboelectric nanogenerator self-powered

Super-high bed sintering for iron ores:variation and optimization of bed resistance

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Journal of Iron and Steel Research International 2025年第1期32卷 40-51页

作者： Liang-ping Xu Lin xiong Hui-bo Liu xi-duan Yang Ai-xiang Mao Pei-dun Chen Guang-hui Li School of Minerals Processing and Bioengineering Central South UniversityChangsha410083HunanChina Central Research Institute Baosteel Group Co.Ltd.Shanghai201900China Manufacturing Management Department Guangdong Zhongnan Iron and Steel Co.Ltd.Shaoguan512123GuangdongChina Technology and Development Center Shandong Taishan Iron and Steel Group Co.Ltd.Jinan271100ShandongChina

As the bed depth increases,sintering yield increases,but the productivity *** reveal the reasons for the decrease in productivity and explore targeted solutions,the bed resistance of mixtures,wet zone,and combustion zone was analyzed in the *** results showed that the decreased porosity of mixture resulted in the increased bed resistance by 160.56%when the bed depth increased from 600 to 1000 *** improving porosity of 1%by adding loosening bars with optimized size and distribution,the bed resistance decreased,and the productivity increased by 5%.The increase in bed depth increased the thickness of the wet zone from 120 to 680 mm and the resistance from 1.56 to 8.83 *** using a three-stage intensive mixer and pre-adding water for granulation,the moisture of mixture was reduced by 0.6%,and the sintering productivity increased by 4%.Besides,the high bed resistance is mainly caused by the increase in the thickness of the combustion zone from 31.9 to 132.7 mm,and the bed resistance increased from 0.70 to 5.62 *** bed resistance of the combustion zone at 900 mm was increased by 90.51%compared to 700 *** optimization of the distribution of coke breeze,the thickness of combustion zone at the lower layer decreased from 132.7 to 106.84 mm and permeability improved significantly.

关键词： Super-high bed sintering Bed resistance Permeability Productivity Wet zone Combustion zone

The regulatory effects of gut microbiota on breast health and human milk composition via gut-mammary gland axis

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Food Science and Human Wellness 2025年

作者： Manlin Zhou xi He Qidi Xue Muhammad Naveed Binqi Rui ye Wang Yinhui Liu Ming Li Department of Microecology， College of Basic Medical Science， Dalian Medical University

The gut-mammary gland axis connects the communication between the gut microbiota and the mammary gland. Studies have reported that dysbiosis in gut microbiota is involved in the pathogenesis of breast diseases such as mastitis and breast cancer. In addition， different diets， including the supplementation of probiotics or prebiotics， which are closely related to the alteration of gut microbiota， were found to affect the nutritional contents of human milk and contribute to the development or alleviation of breast diseases. These studies suggested that the gut microbiota might be a new target for the regulation of human milk components or breast diseases. In this article， we summarized recent research advances in the gut-mammary gland axis and discussed some of the effective mechanisms and pathways involved， including distal translocation of gut microbiota， circulation of metabolites across the blood-milk barrier， the delivery of immune cells and their secreted antibodies to the mammary gland. This article also provides new strategies for preventing women's breast diseases and improving the composition of human milk through the gut-mammary axis.

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