Journal of Magnesium and Alloys最新文献

{"title":"Analytical model to characterize temperature-dependent anisotropic-asymmetric behavior of Mg-Gd-Y alloy","authors":"Pengfei Wu, Qiang Chen, Liucheng Zhou, Xiaoqing Liang, Yanshan Lou","doi":"10.1016/j.jma.2024.11.035","DOIUrl":"https://doi.org/10.1016/j.jma.2024.11.035","url":null,"abstract":"The work is conducted to uncover and simulate the dependence of the evolving anisotropic-asymmetric yield behavior on the temperature for an Mg-Gd-Y alloy. Experiments were carried out at 25∼300 °C, including uniaxial tension and compression. The strength is observed to decrease non-linearly as the temperature increases. Thermal softening effect is not significant when the temperature is lower than 200 °C, but the strength decreases dramatically at high temperature than 250 °C. Tension-compression asymmetry and anisotropy are observed to be strongly and nonlinearly dependent on strain and temperature. The temperature effect is taken into account in a combined Swift-Voce (SVT) model to predict the temperature-dependent strain hardening behavior with a higher accuracy than the traditional Johnson-Cook and Zerilli-Armstrong equations. An analytical Yoon2014 (A-Yoon2014) yield function is established to capture the evolving anisotropic-asymmetric behavior with respect to strain and temperature. The predicted force-stroke curves of the A-Yoon2014+SVT model are closer to the experimental results of the three-point bending process than the numerical results of the original Yoon2014+SVT model. Given its user-friendliness and high accuracy for the modeling of temperature-dependent anisotropic-asymmetric hardening behavior, the A-Yoon2014+SVT model is recommended to be utilized in the numerical simulation of plastic forming process for hexagonal close-packed metals.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"10 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857839","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}

{"title":"Phase equilibria and crystal structures of ternary compounds in the Mg–Gd–Ag system over a composition range of 0–50 at.% Gd at 450 and 500 °C","authors":"Qin Li, Honghui Xu, Lijun Zhang","doi":"10.1016/j.jma.2024.11.032","DOIUrl":"https://doi.org/10.1016/j.jma.2024.11.032","url":null,"abstract":"Alloying with Gd and Ag can significantly enhance the comprehensive properties of magnesium alloys, and accurate phase equilibria are a necessity for advanced alloy design. However, literature review reveals limited information on the phase equilibria in the ternary Mg–Gd–Ag system. Thus, in this paper, the phase equilibria of the ternary Mg–Gd–Ag system in the region of 0–50 at.% Gd at 450 °C and 500 °C were investigated by combining the electron probe microanalysis and X-ray diffraction of totally 66 equilibrated alloys, with two isothermal sections at 450 °C and 500 °C established accordingly; and relatively high solid solubility of Ag in GdMg<sub>3</sub> was characterized. Moreover, seven ternary compounds (denoted as τ<sub>1</sub> to τ<sub>7</sub>) were found, and their crystal structures were refined by using Rietveld method. The τ<sub>1</sub> was identical to the previously reported X phase with a diamond-cubic structure, while the remaining six ternary compounds (τ<sub>2</sub> to τ<sub>7</sub>) were newly found. The seven ternary compounds (τ<sub>1</sub> to τ<sub>7</sub>) are among the space groups of Fd<span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mover accent=\"true\" is=\"true\"><mn is=\"true\">3</mn><mo is=\"true\">¯</mo></mover></math>' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.202ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -846.5 570.5 947.9\" width=\"1.325ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><g is=\"true\" transform=\"translate(35,0)\"><use xlink:href=\"#MJMAIN-33\"></use></g><g is=\"true\" transform=\"translate(0,197)\"><use x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use><use x=\"70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use></g></g></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mover accent=\"true\" is=\"true\"><mn is=\"true\">3</mn><mo is=\"true\">¯</mo></mover></math></span></span><script type=\"math/mml\"><math><mover accent=\"true\" is=\"true\"><mn is=\"true\">3</mn><mo is=\"true\">¯</mo></mover></math></script></span>m (τ<sub>1</sub>), P4/nmm (τ<sub>2</sub>), P6<sub>3</sub>mc (τ<sub>3</sub>), P6<sub>3</sub>mc (τ<sub>4</sub>), Pmn2<sub>1</sub> (τ<sub>5</sub>), P<span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mover accent=\"true\" is=\"true\"><mn is=\"true\">6</mn><mo is=\"true\">¯</mo></mover></math>' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.202ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -846.5 570.5 947.9\" width=\"1.325ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g ","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"7 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848906","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}

{"title":"Ga5Mg2 alloy solid electrolyte interphase in-situ formed in [Mg(DME)3][GaCl4]2/PYR14TFSI/DME electrolyte enables high-performance rechargeable magnesium batteries","authors":"Miao Cheng, Yabing Li, Jiaming Shi, Qianqian Liu, Ruirui Wang, Wujun Ma, Bo Liu, Muzi Chen, Wanfei Li, Yuegang Zhang","doi":"10.1016/j.jma.2024.12.003","DOIUrl":"https://doi.org/10.1016/j.jma.2024.12.003","url":null,"abstract":"Exploiting high-performance electrolyte holds the key for realization practical application of rechargeable magnesium batteries (RMBs). Herein, a new non-nucleophilic mononuclear electrolyte was developed and its electrochemical active species was identified as [Mg(DME)₃][GaCl₄]₂ through single-crystal X-ray diffraction analysis. The as-synthesized Mg(GaCl₄)₂-IL-DME electrolyte could achieve a high ionic conductivity (9.85 mS cm⁻¹), good anodic stability (2.9 V vs. Mg/Mg²⁺), and highly reversible Mg plating/stripping. The remarkable electrochemical performance should be attributed to the in-situ formation of Mg²⁺-conducting Ga₅Mg₂ alloy layer at the Mg/electrolyte interface during electrochemical cycling, which not only efficiently protects the Mg anode from passivation, but also allows for rapid Mg-ion transport. Significantly, the Mg(GaCl₄)₂-IL-DME electrolyte showed excellent compatibility with both conversion and intercalation cathodes. The Mg/S batteries with Mg(GaCl₄)₂-IL-DME electrolyte and KB/S cathode showed a high specific capacity of 839 mAh <em>g</em>⁻¹ after 50 cycles at 0.1 C with the Coulombic efficiency of ∼100 %. Moreover, the assembled Mg||Mo₆S₈ batteries delivered a reversible discharge capacity of 85 mAh <em>g</em>⁻¹ after 120 cycles at 0.2 C. This work provides a universal electrolyte for the realization of high-performance and practical RMBs, especially Mg/S batteries.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"18 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841426","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}

{"title":"Statistical investigation on the tension-compression asymmetry of slip behavior and plastic heterogeneity in an aged Mg-10Y sheet","authors":"Ran Ni, Huashen Liu, Shen Hua, Hao Zhou, Ying Zeng, Dongdi Yin","doi":"10.1016/j.jma.2024.11.033","DOIUrl":"https://doi.org/10.1016/j.jma.2024.11.033","url":null,"abstract":"The grain-scale tension-compression (T-C) asymmetric slip behavior and geometrically necessary dislocation (GND) density in an aged and twin-free Mg-10Y sheet were statistically studied using slip trace analysis and electron backscatter diffraction (EBSD) analysis. A significantly asymmetric slip activity, i.e., higher tensile slip activity and proportion of non-basal slip, was manifested. Prismatic 〈a〉 (37.1 %) and basal 〈a〉 (27.6 %) slips dominated the tensile deformation, followed by pyramidal II 〈<em>c</em> + <em>a</em>〉 slip (20.0 %). While during compression, basal 〈a〉 slip (61.9 %) was the most active slip mode, and only 6.9 % pyramidal II 〈<em>c</em> + <em>a</em>〉 slip was observed. The critical resolved shear stress (CRSS) ratio was estimated based on ∼800 sets of the identified slip traces, which suggested that the CRSS_{pyr II}/CRSS_bas for compression was ∼3 times than that of tension. The pyramidal II 〈<em>c</em> + <em>a</em>〉 slip was more active when the slip plane was under tension than under compression, which was consistent with the calculated asymmetric CRSS_{pyr II}/CRSS_bas. The activity of multiple slip, cross slip and slip transfer, as well as the GND density were also T-C asymmetric. This work thoughtfully demonstrated the T-C asymmetric slip behavior and plastic heterogeneity in Mg alloys which was believed to be responsible for the macroscopic T-C asymmetry when twinning was absent. The present statistical results are valuable for validating and/or facilitating crystal plasticity simulations.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"43 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832013","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}

{"title":"Tensile creep anisotropy and its weakening mechanism in a dilute Mg-Ca alloy","authors":"Limin Wang, Sijia Hu, Chun Xi, Weiwei Zhou, Taku Sakai, Xuyue Yang, Qinghuan Huo","doi":"10.1016/j.jma.2024.12.002","DOIUrl":"https://doi.org/10.1016/j.jma.2024.12.002","url":null,"abstract":"The tensile creep anisotropy of a dilute-alloyed Mg-0.3wt%Ca sheet is investigated along the rolling direction (RD) and normal direction (ND). Strong creep anisotropy is shown between the RD and ND, owing to the easy twinning and the Ca-segregation along twin boundaries during creep loading along the ND. To weaken the creep anisotropy, hot-compression parallel to the RD-ND plane is performed and the continuous dynamic recrystallization mechanism induces a bimodal microstructure with the coexistence of unrecrystallized and recrystallized grains. The creep anisotropy is successfully weakened after hot-compression, and the creep resistance is also significantly enhanced along both loading directions. With the assistance of microstructural characterization, the weakened creep anisotropy is ascribed to the dislocation arrays in the interiors of recrystallized grains and the Ca-segregation along the boundaries of recrystallized grains. Compared to commercial Mg alloys with poor creep property and rare-earth alloyed Mg with high price, good creep performance and low production cost can be synchronously realized in the hot-compressed Mg-0.3wt%Ca alloy. Thus, this work proposes a new perspective for producing creep-resistant Mg alloys.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825588","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}

{"title":"Near-infrared responsive polycaprolactone coatings for magnesium implants: Photodynamic antibacterial and controllable dissolution","authors":"Xi Liu, Jinglong Pan, You Lv, Xu Wang, Xiaoze Ma, Xinxin Zhang, Guangyi Cai, Zehua Dong","doi":"10.1016/j.jma.2024.11.013","DOIUrl":"https://doi.org/10.1016/j.jma.2024.11.013","url":null,"abstract":"Magnesium implants have received widespread attention in orthopaedic surgery. However, the mechanical degradation and concurrent inflammation caused by the rapid corrosion of Mg limits their applications. In this study, a kind of unique core-shell heterojunction CuS@PPy nanostructures was synthesized and then incorporated in polycaprolactone (PCL) to construct an intelligent coating (CuS@PPy/PCL) on micro-arc-oxidized Mg implants. The PCL-based coating can realize near-infrared (NIR)-driven antibacterial and controllable Mg dissolution according to different bone healing stages. At the beginning of bone remodelling, the coating exhibits promising antibacterial properties with 99.67 % and 99.17 % efficacy against <em>S. aureus</em> and <em>E. coli</em>, respectively, thanks to the singlet oxygen (¹O₂) and alkoxyl radicals (RO·) generated by the photodynamic effect of CuS@PPy heterojunction under low-power NIR light (1.5 W/cm²). In the bone reparative stage, the PCL-based coating can maintain high corrosion resistance to meet the mechanical requirements of Mg implants in human body fluid. However, after the complete rehabilitation of bones, through a high-power (2 W/cm²) NIR light, the PCL-based coating changed from an elastic to a viscous flow state (44.7 °C) under the photothermal effects of CuS@PPy, leading to quick degradation of the PCL-based coating and following accelerating dissolution of the Mg implant (avoiding secondary surgery). Hopefully, this NIR-responsive coating may provide an innovative method for the antibacterial and controllable dissolution of Mg implants.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"14 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823310","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}

{"title":"Direct observation of annealing-driven recrystallization behavior in magnesium alloy at low strain condition","authors":"Yuzhi Zhu, Shuoxin Lv, Tianyi Li, Yang Ren, Zidong Wang, Dewen Hou","doi":"10.1016/j.jma.2024.11.016","DOIUrl":"https://doi.org/10.1016/j.jma.2024.11.016","url":null,"abstract":"Grain-twin interactions are significant in texture modification under thermodynamic driving force. In this study, annealing-driven twinning/detwinning behavior, grain growth, and corresponding texture evolution in a pre-deformed AZ31 magnesium alloy were systematically tracked and investigated via in-situ heating synchrotron X-ray diffraction and quasi in-situ electron backscattered diffraction techniques. A twinning texture is generated in the pre-deformed sample due to the activation of {10<span><span style=\"\"></span><span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mover is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mo stretchy=\"true\" is=\"true\"&gt;&amp;#x203E;&lt;/mo&gt;&lt;/mover&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.202ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -846.5 570.5 947.9\" width=\"1.325ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><g is=\"true\" transform=\"translate(35,0)\"><g is=\"true\"><use xlink:href=\"#MJMAIN-31\"></use></g></g><g is=\"true\" transform=\"translate(0,198)\"><use x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use><use x=\"70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use></g></g></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mover is=\"true\"><mrow is=\"true\"><mn is=\"true\">1</mn></mrow><mo is=\"true\" stretchy=\"true\">‾</mo></mover></math></span></span><script type=\"math/mml\"><math><mover is=\"true\"><mrow is=\"true\"><mn is=\"true\">1</mn></mrow><mo stretchy=\"true\" is=\"true\">‾</mo></mover></math></script></span>2} tensile twinning. During annealing, dislocation annihilation occurs between 100 and 280 °C, and recrystallization occurs above 280 °C, manifesting as the initial residual matrix and twins being competitively swallowed by each other, forming a bimodal texture. The recrystallization process is completed by boundary movement, which depends on the energy difference across the boundary. In addition, it is found that the grain boundaries favor movement towards the side with higher stored energy, regardless of the boundary type or the boundary energy.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"38 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142804502","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}

{"title":"Research on edge defects suppression of Mg/Al composite plate rolling: Development of embedded rolling technology","authors":"Chenchen Zhao, Zhiquan Huang, Haoran Zhang, Peng Li, Tao Wang, Qingxue Huang","doi":"10.1016/j.jma.2024.11.024","DOIUrl":"https://doi.org/10.1016/j.jma.2024.11.024","url":null,"abstract":"Edge defects significantly impact the forming quality of Mg/Al composite plates during the rolling process. This study aims to develop an effective rolling technique to suppress these defects. First, an enhanced Lemaitre damage model with a generalized stress state damage prediction mechanism was used to evaluate the key mechanical factors contributing to defect formation. Based on this evaluation, an embedded composite rolling technique was proposed. Subsequently, comparative validation was conducted at 350 °C with a 50 % reduction ratio. Results showed that the plates rolled using the embedded composite rolling technique had smooth surfaces and edges, with no macroscopic cracks observed. Numerical simulation indicated that, compared to conventional processes, the proposed technique reduced the maximum edge stress triaxiality of the plates from −0.02 to −1.56, significantly enhancing the triaxial compressive stress effect at the edges, which suppressed void nucleation and growth, leading to a 96 % reduction in damage values. Mechanical property evaluations demonstrated that, compared to the conventional rolling process, the proposed technique improved edge bonding strength and tensile strength by approximately 67.7 % and 118 %, respectively. Further microstructural characterization revealed that the proposed technique, influenced by the restriction of deformation along the transverse direction (TD), weakened the plastic flow in the TD and enhanced plastic flow along the rolling direction (RD), resulting in higher grain boundary density and stronger basal texture. This, in turn, improved the toughness and transverse homogeneity of the plates. In summary, the embedded composite rolling technique provides crucial technical guidance for the preparation of Mg-based composite plates.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"28 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142804501","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}

{"title":"Simultaneously improving strength and ductility of Mg-Gd-Zr alloy via solute segregation","authors":"Chunquan Liu, Huaqiang Xiao, Bo Lin, Hui Shi, Xianhua Chen","doi":"10.1016/j.jma.2024.11.022","DOIUrl":"https://doi.org/10.1016/j.jma.2024.11.022","url":null,"abstract":"Interface segregation of solute atoms has a profound effect on properties of engineering alloys. In this study, we report a novel strategy for breaking the strength-ductility dilemma of Mg alloy via solute segregation. The hot extruded Mg-1.8Gd-0.3Zr (wt.%) alloy sheet was subjected to three different passes of rolling, and then heat-treated at 200 °C. The high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) reveals a remarkable segregation of solute Gd atoms along high and low-angel grain boundaries (GBs). Under almost precipitation-free conditions, the strength and ductility of rolled alloy sheets are simultaneously improved after annealing. Especially for the annealed 3-passes-rolled specimen, the yield strength, ultimate tensile strength, and elongation are simultaneously increased by 11.2%, 7.3%, and 18%, respectively. The solute segregation endows the rolled plate with excellent grain size stability and provides a prominent extra solute cluster strengthening, which completely resists the other softening effects, including dislocation annihilation and grain coarsening during the heating. Meanwhile, the directional migration of Gd atoms and the annihilation of dislocations provide a “clear” space within the grain, which is beneficial for the moving and accumulating of subsequent dislocations. This work sheds light on the solute partitioning behavior and realizes a good application of GB segregation in improving the comprehensive mechanical properties of Mg alloys.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"14 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793142","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}

{"title":"Li+/Mg2+ co-intercalation SnS2-SPAN cathode for super-stable magnesium-based batteries","authors":"Yiyi Wang, Zhenfeng Guan, Yinggan Zhang, Baihua Qu, Baisheng Sa, Xiaoyuan Zhou, Jingfeng Wang, Dong-Liang Peng, Qingshui Xie, Fusheng Pan","doi":"10.1016/j.jma.2024.11.025","DOIUrl":"https://doi.org/10.1016/j.jma.2024.11.025","url":null,"abstract":"Magnesium-lithium hybrid batteries (MLHBs) have gained increasing attention due to their combined advantages of rapid ion insertion/extraction cathode and magnesium metal anode. Herein, SnS₂-SPAN hybrid cathode with strong C-Sn bond and rich defects is ingeniously constructed to realize Mg²⁺/Li⁺ co-intercalation. The physical and chemical double-confinement synergistic engineering of sulfurized polyacrylonitrile can suppress the agglomeration of SnS₂ nanoparticles and the volume expansion, simultaneously promote charge transfer and enhance structural stability. The introduced abundant sulfur vacancies provide more active sites for Mg²⁺/Li⁺ co-intercalation. Meanwhile, the beneficial effects of rich sulfur defects and C-Sn bond on enhanced electrochemical properties are further evidenced by density-functional theory (DFT) calculations. Therefore, compared with pristine SnS₂, SnS₂-SPAN cathode displays high specific capacity (218 mAh g⁻¹ at 0.5 A g⁻¹ over 700 cycles) and ultra-long cycling life (101 mAh g⁻¹ at 5 A g⁻¹ up to 28,000 cycles). And a high energy density of 307 Wh kg⁻¹ can be realized by the SnS₂-SPAN//Mg pouch cell. Such elaborate and simple design supplies a reference for the exploitation of advanced cathode materials with excellent electrochemical properties for MLHBs.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"84 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788771","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}