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Weakening of through-thickness texture gradient in tantalum plates by newly developed dynamic offsets and shear force adjustment rolling 新发展的动态偏移和剪切力调整轧制弱化钽板的全厚织构梯度
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66764-1
Kai YU , Long-fei XU , Li WANG , Gui-peng LI , Xiao-dan ZHANG , Yu-hui WANG
{"title":"Weakening of through-thickness texture gradient in tantalum plates by newly developed dynamic offsets and shear force adjustment rolling","authors":"Kai YU ,&nbsp;Long-fei XU ,&nbsp;Li WANG ,&nbsp;Gui-peng LI ,&nbsp;Xiao-dan ZHANG ,&nbsp;Yu-hui WANG","doi":"10.1016/S1003-6326(25)66764-1","DOIUrl":"10.1016/S1003-6326(25)66764-1","url":null,"abstract":"<div><div>Traditional symmetrical rolling often induces through-thickness gradient microstructures and textures. In this study, ultra-high purity (99.999 wt.%) tantalum (Ta) served as a model material to address the texture gradient issue by employing dynamic offsets and shear force adjustment rolling (DS rolling) as an advanced rolling technique. The strain and stress distributions in Ta plates for DS rolling and symmetrical rolling processes were analyzed using Deform 3D software. Through-thickness textures and microstructures were characterized via electron backscatter diffraction. The results revealed that DS rolling effectively solved the problem of texture gradient by increasing the average shear strain from 0.05 to 0.56. In turn, the shear stress reduced the energy storage orientation dependence of {100} and {111} grains. Furthermore, DS rolling refined the recrystallized grains on an average of 30.9%.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1517-1531"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Environmental impacts and carbon footprint of high-value recycling of NdFeB scrap under life cycle assessment 基于生命周期评价的高价值废钕铁硼回收的环境影响与碳足迹
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66778-1
Jun-feng WANG , Lu-jing LIU , Ming YANG , Yang WANG , Yi-fan GU , Ying-yan HU , Liang-fang LIAO
{"title":"Environmental impacts and carbon footprint of high-value recycling of NdFeB scrap under life cycle assessment","authors":"Jun-feng WANG ,&nbsp;Lu-jing LIU ,&nbsp;Ming YANG ,&nbsp;Yang WANG ,&nbsp;Yi-fan GU ,&nbsp;Ying-yan HU ,&nbsp;Liang-fang LIAO","doi":"10.1016/S1003-6326(25)66778-1","DOIUrl":"10.1016/S1003-6326(25)66778-1","url":null,"abstract":"<div><div>The NdFeB scrap, as a representative solid waste of rare earths, possesses significant recyclable value. This study focused on NdFeB waste and investigated the environmental impacts of pyro- and hydro-metallurgical process (PH-M process) and its improved version, the pyro- and hydro-metallurgical improvement process (PH-Mi process). The results demonstrate that, although the PH-Mi process consumes higher amounts of energy, electricity, and chemicals compared to the PH-M process, it is more environmentally friendly and economically efficient (i.e., net profit increased by 34.12%). To quantify and compare the environmental performance of the two scenarios, life cycle assessment methodology was applied. It is concluded that the PH-Mi process is superior to the PH-M process for eutrophication potential (EP) and the total environmental impacts. In comparison with PH-Mi process, PH-M process exhibits a certain advantage in terms of carbon footprint due to increased consumption of electricity and chemicals after the technological upgrade.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1713-1728"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of binders on electrochemical properties of AgO cathode material for aqueous AgO−Al batteries 粘结剂对水性AgO - Al电池AgO正极材料电化学性能的影响
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66773-2
Xue-hua HE , Sheng-gui WANG , Yuan-kui WANG , Wan-li XU , Jue-min SONG , Zheng LI , Hai-tao ZHANG , Guang-zhou YANG , Xin-yi WANG , Qian ZHANG , Hong-xu LI , Kun YU
{"title":"Effect of binders on electrochemical properties of AgO cathode material for aqueous AgO−Al batteries","authors":"Xue-hua HE ,&nbsp;Sheng-gui WANG ,&nbsp;Yuan-kui WANG ,&nbsp;Wan-li XU ,&nbsp;Jue-min SONG ,&nbsp;Zheng LI ,&nbsp;Hai-tao ZHANG ,&nbsp;Guang-zhou YANG ,&nbsp;Xin-yi WANG ,&nbsp;Qian ZHANG ,&nbsp;Hong-xu LI ,&nbsp;Kun YU","doi":"10.1016/S1003-6326(25)66773-2","DOIUrl":"10.1016/S1003-6326(25)66773-2","url":null,"abstract":"<div><div>To improve the slow kinetics and poor mechanical strength of aqueous silver peroxide−aluminum (AgO−Al) battery cathode materials, the effects of different binders including polytetrafluoroethylene (PTFE) and polyvinylpyrrolidone (PVP) on the AgO cathode material were investigated. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedance spectrum (EIS), and galvanostatic discharge. In contrast to the pure AgO and AgO−PTFE electrodes, the results demonstrated that the PVP effectively bound the electrode materials together. The prepared AgO−PVP as the cathode material of AgO−Al batteries could improve the battery capacity, exhibiting a high specific capacity (389.95 mA·h/g at 500 mA/cm<sup>2</sup>), a high operating voltage (1.75 V at 500 mA/cm<sup>2</sup>), a maximum energy density (665.65 W·h/kg), and a maximum power density (5236 W/kg). Furthermore, the electrochemical mechanism of the AgO−PVP cathode material was examined, revealing that the electrode exhibited rapid ion diffusion and effective interfacial ion/electron transport.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1648-1661"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synchronous enhancement of mechanical properties and degradation rates of as-extruded Mg−Er−Ni alloys by controlling Er content 通过控制Er含量同步提高挤压态Mg−Er−Ni合金的力学性能和降解率
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(24)66761-0
Chao-neng DAI , San-lue PEI , Ye WANG , Zi-hong WANG , Jin-xing WANG , Yan-long MA , Jing-feng WANG
{"title":"Synchronous enhancement of mechanical properties and degradation rates of as-extruded Mg−Er−Ni alloys by controlling Er content","authors":"Chao-neng DAI ,&nbsp;San-lue PEI ,&nbsp;Ye WANG ,&nbsp;Zi-hong WANG ,&nbsp;Jin-xing WANG ,&nbsp;Yan-long MA ,&nbsp;Jing-feng WANG","doi":"10.1016/S1003-6326(24)66761-0","DOIUrl":"10.1016/S1003-6326(24)66761-0","url":null,"abstract":"<div><div>The synchronous enhancement mechanism of the mechanical properties and degradation rate of as-extruded Mg−<em>x</em>Er−1.6Ni alloys (<em>x</em>=17, 12, and 9.5, wt.%) was investigated by controlling Er content. Results indicate that, as the Er content decreases, the overall content and the distribution of secondary phases did not change evidently, while the type of the secondary phases changed from single long-period stacking ordered (LPSO) phase to coexistence of the LPSO phase and <em>γ′</em> phase. Notably, the tensile yield strength (TYS) and degradation rate of the Mg alloy with a lower Er content (i.e., Mg−9.5Er−1.6Ni alloy) are increased by 22.3% and 51.5% respectively compared to those of the Mg alloy with a higher Er content (i.e., Mg−17Er−1.6Ni). The enhancement of mechanical properties of the Mg alloy with a lower Er content is attributed to the formation of <em>γ′</em> phase, which can refine the grain size by inhibiting dynamic recrystallization, leading to enhanced TYS by secondary phase and grain boundary strengthening. Meanwhile, finer grains and the <em>γ′</em> phase also provide more corrosion sites and inhibit the formation of corrosion-resistant Er<sub>2</sub>O<sub>3</sub> film, thereby accelerating the corrosion of Mg alloy.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1471-1489"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Ga doping on glass-forming ability and mechanical properties of CuZrAlY metallic glass composites Ga掺杂对CuZrAlY金属玻璃复合材料非晶形成能力和力学性能的影响
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66767-7
Peng XUE, Kun QIAN, Xiao-bing LI, Bo CHEN, Lei SHU, Meng-shu ZHANG, Jun-jie HAO, Kui LIU
{"title":"Effect of Ga doping on glass-forming ability and mechanical properties of CuZrAlY metallic glass composites","authors":"Peng XUE,&nbsp;Kun QIAN,&nbsp;Xiao-bing LI,&nbsp;Bo CHEN,&nbsp;Lei SHU,&nbsp;Meng-shu ZHANG,&nbsp;Jun-jie HAO,&nbsp;Kui LIU","doi":"10.1016/S1003-6326(25)66767-7","DOIUrl":"10.1016/S1003-6326(25)66767-7","url":null,"abstract":"<div><div>The influence of Ga doping on the structure and mechanical properties of <em>B</em>2-CuZr phase reinforced larger-size CuZrAlY metallic glass composites was investigated by experiments and simulations. The result showed that as Ga content increased, the glass-forming ability of CuZrAlY metallic glass composites was gradually enhanced. Section morphology and thermal analysis indicated that Ga doping induced the decreased content of the crystals and the enlargement of the super-cooled liquid region, and increased activation energy for crystallization. Ga also stabilized the <em>B</em>2-CuZr phase. Characterization of the microstructure and mechanical test results suggested that the <em>B</em>19<em>‘</em>-CuZr phase disappeared in the as-cast samples after adding Ga, and the martensitic transformation of the <em>B</em>2-CuZr phase was hindered when Ga content increased. The evolution mechanism of mechanical behaviors of the CuZr-based metallic glass composites during Ga doping was clarified by first-principles calculation. The results would be beneficial to the development and application of large-size CuZr-based metallic glass composites.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1560-1569"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of rejuvenation heat treatment on serrated flow behavior and fracture mechanism of nickel-based superalloys 回火热处理对镍基高温合金锯齿状流动行为及断裂机制的影响
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66770-7
Jia-jian WANG , Zhe-wen HAN , Zhi-chun WANG , Bo PENG , Yue ZUO , Ju KANG
{"title":"Effect of rejuvenation heat treatment on serrated flow behavior and fracture mechanism of nickel-based superalloys","authors":"Jia-jian WANG ,&nbsp;Zhe-wen HAN ,&nbsp;Zhi-chun WANG ,&nbsp;Bo PENG ,&nbsp;Yue ZUO ,&nbsp;Ju KANG","doi":"10.1016/S1003-6326(25)66770-7","DOIUrl":"10.1016/S1003-6326(25)66770-7","url":null,"abstract":"<div><div>The effects of rejuvenation heat treatment (RHT) on the serrated flow behavior and fracture mode of nickel- based superalloys (R26) were investigated by tensile tests and microstructural characterization. The serrated flow activation energies were determined to be 41−72 and 64−81 kJ/mol before and after RHT, respectively. Dynamic strain aging in the alloy is caused by the diffusion of carbon atoms into dislocation channels in the nickel matrix. Before RHT, carbides are concentrated at the grain boundaries. Cracks initiate from these carbides and propagate along the grain boundaries. RHT dissolves carbides at grain boundaries, transferring crack initiation to the precipitated phase group in the grains. RHT increases carbon atom concentration in the nickel matrix, enhancing dynamic strain aging and serrated flow behavior.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1603-1618"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure and mechanical properties of electron beam additively manufactured Ti−1Al−8V−5Fe alloy with different iron contents 不同铁含量的电子束增材制备Ti−1Al−8V−5Fe合金的显微组织和力学性能
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66763-X
Quan ZHOU , Xue-zhe ZHANG , Sheng-lu LU , Hui-ping TANG , Ma QIAN
{"title":"Microstructure and mechanical properties of electron beam additively manufactured Ti−1Al−8V−5Fe alloy with different iron contents","authors":"Quan ZHOU ,&nbsp;Xue-zhe ZHANG ,&nbsp;Sheng-lu LU ,&nbsp;Hui-ping TANG ,&nbsp;Ma QIAN","doi":"10.1016/S1003-6326(25)66763-X","DOIUrl":"10.1016/S1003-6326(25)66763-X","url":null,"abstract":"<div><div>Ti−1Al−8V−5Fe (Ti-185) alloy with different iron contents was additively manufactured by electron beam powder bed fusion (EB-PBF), and its microstructure and mechanical properties were investigated. The results show that increasing the Fe powder content from 4.56 wt.% to 5.98 wt.% (within the specification range) converted coarse columnar prior-<em>β</em> grains in as-printed alloy into fine equiaxed ones ((54.2±32.4) μm) by EB-PBF. However, due to subsequent in-situ precipitation, a micron-thick low-solute weak <em>α</em>-phase became prevalent along each equiaxed grain boundary (GB). This drastically decreased the tensile deformation energy of Ti-185 from 6.2×10<sup>7</sup> J/m<sup>3</sup> (columnar grains) to 4.8×10<sup>7</sup> J/m<sup>3</sup> (equiaxed grains), despite a mild increase in strength. Fracture characteristics unveiled that the weak GB <em>α</em>-phase is the main crack initiation site and propagation path.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1506-1516"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure, mechanical and thermo-physical properties of Al/Al−27%Si laminated composites Al/Al−27%Si层合复合材料的微观结构、力学性能和热物理性能
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(24)66756-7
Zi-ming LI , Zhi-yong CAI , Hao YAN , Qian HAN , Nan CHEN , Ri-chu WANG , Xiang PENG , Chun ZHANG
{"title":"Microstructure, mechanical and thermo-physical properties of Al/Al−27%Si laminated composites","authors":"Zi-ming LI ,&nbsp;Zhi-yong CAI ,&nbsp;Hao YAN ,&nbsp;Qian HAN ,&nbsp;Nan CHEN ,&nbsp;Ri-chu WANG ,&nbsp;Xiang PENG ,&nbsp;Chun ZHANG","doi":"10.1016/S1003-6326(24)66756-7","DOIUrl":"10.1016/S1003-6326(24)66756-7","url":null,"abstract":"<div><div>Three types of Al/Al−27%Si laminated composites, each containing 22% Si, were fabricated via hot pressing and hot rolling. The microstructures, mechanical properties and thermo-physical properties of these composites were investigated. The results demonstrated that the three laminated composites exhibited similar microstructural features, characterized by well-bonded interfaces between the Al layer and the Al−27%Si alloy layer. The tensile and flexural strengths of the composites were significantly higher than those of both Al−22%Si and Al−27%Si alloys. These strengths increased gradually with decreasing the layer thickness, reaching peak values of 222.5 and 407.4 MPa, respectively. Crack deflection was observed in the cross-sections of the bending fracture surfaces, which contributed to the enhanced strength and toughness. In terms of thermo-physical properties, the thermal conductivity of the composites was lower than that of Al−22%Si and Al−27%Si alloys. The minimum reductions in thermal conductivity were 6.8% and 0.9% for the T3 laminated composite, respectively. Additionally, the coefficient of thermal expansion of the composites was improved, exhibiting varying temperature-dependent behaviors.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1394-1405"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Static recrystallization kinetics and texture evolution of low-temperature extruded Mg−Zn−Ca alloy during annealing 低温挤压Mg−Zn−Ca合金退火过程的静态再结晶动力学和织构演变
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(24)66760-9
Hua WANG , Da-tong ZHANG , Cheng QIU , Dao-lun CHEN
{"title":"Static recrystallization kinetics and texture evolution of low-temperature extruded Mg−Zn−Ca alloy during annealing","authors":"Hua WANG ,&nbsp;Da-tong ZHANG ,&nbsp;Cheng QIU ,&nbsp;Dao-lun CHEN","doi":"10.1016/S1003-6326(24)66760-9","DOIUrl":"10.1016/S1003-6326(24)66760-9","url":null,"abstract":"<div><div>A low-alloyed Mg−1.2Zn−0.1Ca alloy was extruded at 150 °C, followed by annealing at varying temperatures of 200−300 °C. The microstructural evolution and static recrystallization kinetics were investigated. The as-extruded alloy exhibited a bimodal structure consisting of fine recrystallized grains of 0.8 μm and coarse un- recrystallized grains, with a recrystallized fraction of ~67%. The recrystallization process at 250 °C was identified to be appropriate with a slow recrystallized grain growth rate. The grains with and orientations exhibited preferential growth advantages during long-term annealing. Grain boundary segregation exerted a strong Zener pinning effect on the grain boundaries, which not only increased the grain growth activation energy, but also affected the texture evolution.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1456-1470"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical evaluation of Fe2+ ions in MgCl2−NaCl−KCl melt MgCl2 - NaCl - KCl熔体中Fe2+离子的电化学评价
IF 4.7 1区 材料科学
Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66777-X
Jia ZHAO , Zhao-ting LIU , Gui-min LU
{"title":"Electrochemical evaluation of Fe2+ ions in MgCl2−NaCl−KCl melt","authors":"Jia ZHAO ,&nbsp;Zhao-ting LIU ,&nbsp;Gui-min LU","doi":"10.1016/S1003-6326(25)66777-X","DOIUrl":"10.1016/S1003-6326(25)66777-X","url":null,"abstract":"<div><div>A comprehensive electrochemical assessment of Fe<sup>2+</sup> behavior in a MgCl<sub>2</sub>−NaCl−KCl melt was reported, involving cyclic voltammetry (CV), square wave voltammetry (SWV), and chronoamperometry (CA) analyses. Reduction of Fe<sup>2+</sup> in MgCl<sub>2</sub>−NaCl−KCl was observed to occur in a single step involving two electrons, exhibiting quasi-reversible behavior. The diffusion coefficient of Fe<sup>2+</sup> (5.75×10<sup>−5</sup> cm<sup>2</sup>/s) in this system was experimentally determined at 973 K, with an associated diffusion activation energy of 25.06 kJ/mol in the range of 973−1048 K, and an estimated standard rate constant for Fe<sup>2+</sup>/Fe of around 1×10<sup>−3</sup> cm/s. The nucleation of Fe on the tungsten electrode in the MgCl<sub>2</sub>−NaCl−KCl molten salt is insensitive to temperature and overpotential. It is found that the nucleation mode is related to the concentration of Fe<sup>2+</sup> surrounding the electrode and evolves from an instantaneous to a progressive process, accompanied by a deterioration of magnesium electrolysis due to Fe impurities.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1704-1712"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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