Journal of Magnesium and Alloys最新文献

{"title":"Isothermal hydrogen absorption process of Pd-capped Mg films traced by ion beam techniques and optical methods","authors":"D. Abejón ,&nbsp;P. Prieto ,&nbsp;J.K. Kim ,&nbsp;A. Redondo-Cubero ,&nbsp;M.L. Crespillo ,&nbsp;F. Leardini ,&nbsp;I.J. Ferrer ,&nbsp;G. García ,&nbsp;J.R. Ares","doi":"10.1016/j.jma.2024.09.019","DOIUrl":"10.1016/j.jma.2024.09.019","url":null,"abstract":"<div><div>Pd-capped nanocrystalline Mg films were prepared by electron beam evaporation and hydrogenated under isothermal conditions to investigate the hydrogen absorption process via ion beam techniques and in situ optical methods. Films were characterized by different techniques such as X-ray diffraction (XRD) and scanning electron microscopy (SEM). Rutherford backscattering spectrometry (RBS) and elastic recoil detection analysis (ERDA) provided a detailed compositional depth profile of the films during hydrogenation. Gas-solid reaction kinetics theory applied to ERDA data revealed a H absorption mechanism controlled by H diffusion. This rate-limiting step was also confirmed by XRD measurements. The diffusion coefficient (D) was also determined via RBS and ERDA, with a value of <span><math><mrow><mrow><mo>(</mo><mn>1.1</mn><mo>±</mo><mn>0.1</mn><mo>)</mo></mrow><mo>·</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>13</mn></mrow></msup></mrow></math></span> cm<span><math><msup><mrow></mrow><mn>2</mn></msup></math></span>/s at 140 <span><math><msup><mrow></mrow><mo>∘</mo></msup></math></span>C. Results confirm the validity of IBA to monitor the hydrogenation process and to extract the control mechanism of the process. The H kinetic information given by optical methods is strongly influenced by the optical absorption of the magnesium layer, revealing that thinner films are needed to extract further and reliable information from that technique.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3675-3684"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142439520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waste Mg alloys hydrogen production from seawater: An integrative overview of medium optimization, hydrogen-producing materials, underlying mechanisms, innovative technologies, and device development","authors":"Danting Li ,&nbsp;Xiaojiang Hou ,&nbsp;Duode Zhao ,&nbsp;Chenlu Wang ,&nbsp;Xinlei Xie ,&nbsp;Xiaohui Ye ,&nbsp;Guang Yang ,&nbsp;Ping Hu ,&nbsp;Guangsheng Xu","doi":"10.1016/j.jma.2024.06.033","DOIUrl":"10.1016/j.jma.2024.06.033","url":null,"abstract":"<div><div>In response to global carbon neutrality targets, there is an urgent need for large-scale, clean hydrogen production technologies to supplant fossil fuels and underpin the establishment of a ‘hydrogen economy’. The prospect of large-scale on-site green hydrolysis of Mg-based materials for hydrogen production has attracted wide attention. Aiming at the problems of easy formation of inert oxide layer on its surface and the production of Mg(OH)₂ to hinder the hydrolysis process, it is urgent to explore efficient, low-cost and green modification strategies. In this work, the green modification strategy for hydrolyzing hydrogen production of Mg-based materials was summarized, and the fast initial kinetics and high hydrogen production rate could be achieved by adjusting hydrolysis medium conditions and modifying Mg-based material. The significance of hydrolytic hydrogen production technology and device development for the realization of Mg-based hydrolytic hydrogen production was evaluated. Meanwhile, this work looks forward to the future direction of hydrogen production modification by hydrolysis of Mg-based alloy, and gradually optimizes the hydrolysis performance of industrial multi-component waste Mg alloy under the premise of green hydrogen production, and proposes the goal of efficient modification of waste Mg alloy, high-quality utilization of seawater, and low-cost and controllable hydrogen production process.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3491-3515"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interface and energy band manipulation of Bi2O3-Bi2S3 electrode enabling advanced magnesium-ion storage","authors":"","doi":"10.1016/j.jma.2023.01.007","DOIUrl":"10.1016/j.jma.2023.01.007","url":null,"abstract":"<div><div>Rechargeable magnesium-ion (Mg-ion) batteries have attracted wide attention for energy storage. However, magnesium anode is still limited by the irreversible Mg plating/stripping procedure. Herein, a well-designed binary Bi₂O₃-Bi₂S₃ (BO-BS) heterostructure is fulfilled by virtue of the cooperative interface and energy band engineering targeted fast Mg-ion storage. The built-in electronic field resulting from the asymmetrical electron distribution at the interface of electron-rich S center at Bi₂S₃ side and electron-poor O center at Bi₂O₃ side effectively accelerates the electrochemical reaction kinetics in the Mg-ion battery system. Moreover, the as-designed heterogenous interface also benefits to maintaining the electrode integrity. With these advantages, the BO-BS electrode displays a remarkable capacity of 150.36 mAh g⁻¹ at 0.67 A g^–1 and a superior cycling stability. This investigation would offer novel insights into the rational design of functional heterogenous electrode materials targeted the fast reaction kinetics for energy storage systems.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3543-3552"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48168320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Twinning mediated anisotropic fracture behavior in bioimplant grade hot-rolled pure magnesium","authors":"Prakash C. Gautam ,&nbsp;Somjeet Biswas","doi":"10.1016/j.jma.2024.09.013","DOIUrl":"10.1016/j.jma.2024.09.013","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Bioimplant grade hot-rolled magnesium with equiaxed microstructure and basal texture was examined for fracture toughness (FT) anisotropy using fatigue pre-cracked single-edge notch bending specimens with the notch, &lt;em&gt;a&lt;sub&gt;n&lt;/sub&gt;&lt;/em&gt; ∥, ⊥ and 45° to rolling direction (RD). Due to adequate crack-tip plasticity, the size-independent elastic-plastic fracture toughness (&lt;em&gt;J&lt;sub&gt;IC&lt;/sub&gt;&lt;/em&gt;) were determined. Anisotropic &lt;em&gt;J&lt;sub&gt;IC&lt;/sub&gt;&lt;/em&gt; was observed due to different twin lamellae formation w.r.t. notch owing to the initial basal texture with &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;{&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;}&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;{&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;11&lt;/mn&gt;&lt;mover&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;}&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; poles mostly ∥ and ⊥ to RD. The out-of-plane tensile stresses activated the &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;{&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;}&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;〈&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;〉&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; extension twins (ET) as usual with matrix-ET Σ15b coincident site lattice boundary (CSLB) interfaces. While the in-plane tensile stress ⊥ to the crack-tip activated &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;{&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;}&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;〈&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;〉&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; contraction twins (CT) that transform into &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;{&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;}&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;-&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;{&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mover&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;}&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; double twins (DT) with matrix-DT Σ23b and Σ15a CSLBs. For &lt;em&gt;a&lt;sub&gt;n&lt;/sub&gt;&lt;/em&gt;∥ RD, large DT lamellae fraction formed at ∼30° and few ETs at ∼30° and ∼90° to the notch with crack growth mainly via the Σ23b/Σ15a CSLB interfaces during FT. While, significant DT and ET lamellae developed at ∼0° and ∼60° with cracking via the matrix-DT Σ23b/Σ15a and matrix-ET Σ15b CSLBs for &lt;em&gt;a&lt;sub&gt;n&lt;/sub&gt;&lt;/em&gt;⊥ RD. The DT and ET lamellae activated at ∼15°, and the crack propagated through Σ15b for &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/msub&gt;&lt;mo&gt;∼&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;45&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; to RD. The &lt;em&gt;J&lt;sub&gt;IC&lt;/sub&gt;&lt;/em&gt; and the crack-tip plastic zone decreases, while the elastic component of the J-integral (&lt;em&gt;J&lt;sub&gt;el&lt;/sub&gt;&lt;/em&gt;) and the ET formation increases from &lt;em&gt;a&lt;sub&gt;n&lt;/sub&gt;&lt;/em&gt;∥, ⊥,  to &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;∼&lt;/mo&gt;&lt;msup&gt;&lt;mn&gt;45&lt;/mn&gt;&lt;mo&gt;∘&lt;/mo&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; to RD. The strain incompatibility of matrices was higher with the geometrically hard ETs than DTs. Thus, brittle interlamellar cracking occurred through the Σ15b interfaces. In contrast, almost similar and higher crack-tip","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3806-3822"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142439174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An overview of electrochemical, non-electrochemical and analytical approaches for studying corrosion in magnesium and its alloys","authors":"Arash Fattah-Alhosseini ,&nbsp;Minoo Karbasi ,&nbsp;Razieh Chaharmahali ,&nbsp;Abdelhameed Fardosi ,&nbsp;Mosab Kaseem","doi":"10.1016/j.jma.2024.08.017","DOIUrl":"10.1016/j.jma.2024.08.017","url":null,"abstract":"<div><div>Corrosion is a pervasive phenomenon affecting materials across a multitude of scales, from the atomic to the macroscopic. This review paper presents a comprehensive examination of the methodologies employed in the analysis of magnesium corrosion, including electrochemical, non-electrochemical and analytical approaches, emphasizing the need for a diverse array of analytical tools to understand the complex interplay between corrosion, microstructure, and the dissolution mechanisms of magnesium alloys. The research showcases the utility of specific tools like SEM/EDS and SKPFM for targeted site analysis, while XPS and FTIR provide a broader perspective on specimen surfaces. The paper also discusses the value of <em>in-situ</em> analysis techniques, which allow for the real-time observation of corrosion processes, offering a dynamic view of the emergence and evolution of corrosion products. These <em>in-situ</em> methods stand in contrast to <em>ex-situ</em> analyses, which only permit post-experimental evaluation. By highlighting the capabilities of various analytical tools, from those that reveal surface layer details to those that probe deeper structures, and from those that detect primary elements to those that trace minute quantities of impurities, this study underscores the intricate nature of corrosion and the critical role of advanced analytical techniques in fostering a deeper understanding of material degradation. The findings advocate for the increased application of <em>in-situ</em> analysis in magnesium corrosion research, as it provides a more immediate and accurate depiction of corrosion dynamics, potentially leading to more effective corrosion prevention and control strategies.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3516-3542"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneously improving thermal conductivity, mechanical properties and metal fluidity through Cu alloying in Mg-Zn-based alloys","authors":"","doi":"10.1016/j.jma.2024.04.014","DOIUrl":"10.1016/j.jma.2024.04.014","url":null,"abstract":"<div><div>Mg-Zn-based alloys have been widely used in computer, communication, and consumer (3C) products due to excellent thermal conductivity. However, it is still a challenge to balance their mechanical performance and thermal conductivity. Here, we investigate microstructure, mechanical performance, thermal conductivity and metal fluidity of Mg-5Zn (wt.%) alloy after Cu alloying by experimental and simulation methods. First, Mg-5Zn alloy consist of α-Mg matrix and interdendritic MgZn phases. As the Cu content increases, however, MgZn phases disappear but intragranular Mg₂Cu and interdendritic MgZnCu phases appear in Mg-5Zn-Cu alloys. Besides, the grain size of α-Mg phase is refined and the volume fraction of MgZnCu phase increases as the Cu content increases. Second, Cu addition is found to improve thermal conductivity of Mg-5Zn alloy remarkably. Especially, Mg-5Zn-4Cu alloy exhibits the best thermal conductivity of 124 W/(m·K), which is mainly due to the significant reduction in both solid solubility of Zn in the α-Mg matrix and lattice distortion of α-Mg matrix. Moreover, a stable crystal structure of MgZnCu phase also contributes to an increased thermal conductivity based on first principles and molecular dynamics simulations. Third, Cu addition simultaneously enhances strength and ductility of Mg-5Zn alloy. Tensile yield strength and elongation of Mg-5Zn-6Cu alloy reach 117 MPa and 18.0 %, respectively, which is a combined result of refinement, solution, second phase, and dislocation strengthening. Finally, combined with a phase field simulation, we found that Cu addition enhances metal fluidity of Mg-5Zn alloy. On the one hand, Cu alloying not only delays dendrite growth but also prolongs solidification time. On the other hand, MgZnCu phase stabilizes the dendrite growth of the α-Mg phases by reducing energy consumption during solidification of liquid metal. This work demonstrates that Cu alloying is an ideal strategy for synergistically improving the thermal conductivity, mechanical performance and metal fluidity of Mg-based alloys.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3823-3839"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141029111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of pre-deformation on precipitation behavior of AZ80 alloy: Comparison of slip- and twinning-dominant deformation","authors":"Hyun Ji Kim ,&nbsp;Sang Cheol Jin ,&nbsp;Sumi Jo ,&nbsp;Sung Hyuk Park","doi":"10.1016/j.jma.2024.09.001","DOIUrl":"10.1016/j.jma.2024.09.001","url":null,"abstract":"<div><div>This study investigates the effect of the deformation mode on the precipitation behavior of an extruded Mg–8.0Al–0.5Zn–0.2Mn (AZ80) alloy. The alloy samples are compared after the application of 3.5% tension and 3.5% compression along the extrusion direction to induce slip-dominant and twinning-dominant deformation modes, respectively. The pre-compressed (PC) sample, which contained numerous {10–12} tension twins, has a reduced grain size and a higher internal strain than the pre-tensioned (PT) sample, which is attributed to the inherent internal strain that occurs during the formation and growth of the twins. As a result, the precipitation behavior of the PC sample is accelerated, leading to its short peak aging time of 32 h, which is lower than those of the PT and as-extruded samples (48 and 100 h, respectively). Furthermore, fine continuous precipitates (CPs) rapidly form within the {10–12} twins, contributing to the enhanced hardness. Discontinuous precipitates (DPs), which have a hardness comparable to the CP-containing twinned regions, in the PC sample experience less coarsening during aging than those in the PT sample due to growth inhibition by the {10–12} twins. Ultimately, the {10–12} twins generated under the twinning-dominant deformation condition lead to enhanced precipitation behaviors, including the preferential formation and refinement of CPs and the suppressed coarsening of DPs. Consequently, pre-deformation that occurs {10–12} twinning exhibits more pronounced effects on precipitation acceleration and microstructural modification than slip-inducing pre-deformation.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3616-3630"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Sr on microstructure evolution, mechanical and corrosion properties of extruded Mg-2Zn-0.5Ca alloy","authors":"","doi":"10.1016/j.jma.2023.03.008","DOIUrl":"10.1016/j.jma.2023.03.008","url":null,"abstract":"<div><div>Degradable Mg-Zn-Ca alloys with Sr addition were prepared by vacuum melting and hot extrusion. Effect of Sr on microstructure, mechanical and corrosion properties of hot extruded Mg-2Zn-0.5Ca-<em>x</em>Sr (<em>x</em> = 0, 0.5, 1.0) alloys was investigated. The results show that Sr addition into Mg-2Zn-0.5Ca alloys produced significant grain refinement in ingots and obvious texture weakening effects in extruded bars. The ultimate compressive strength increased as the Sr content increased, while the ultimate tensile strength increased firstly and then declined with the increasing of Sr content. Electrochemical tests indicated the corrosion current density of the surface parallel to extrusion direction (ED) was much lower than that of the surface perpendicular to ED. In-vitro immersion tests demonstrated the increase in the pH of solution and weight loss of Mg-2Zn-0.5Ca-0.5Sr alloy remain the lowest during immersion tests. The best comprehensive property was obtained in Mg-2Zn-0.5Ca-0.5Sr alloy, which has the largest strength and the best corrosion resistance.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3744-3757"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45972425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of organic-inorganic 3D-nanocontainers for smart corrosion protection of friction stir welded AZ31B magnesium alloy-titanium dissimilar joints","authors":"Sepideh Aliasghari ,&nbsp;Teruo Hashimoto ,&nbsp;Peter Kelly ,&nbsp;Allan Matthews","doi":"10.1016/j.jma.2024.09.004","DOIUrl":"10.1016/j.jma.2024.09.004","url":null,"abstract":"<div><div>The joining of different light metals through friction stir welding (FSW) is gaining interest as a method to decrease weight and improve fuel efficiency. However, to ensure durability, these welded metals may require surface treatments to protect against corrosion or wear. This study presents a novel approach for the simultaneous delivery of two distinct corrosion inhibitors to Ti-Mg dissimilar PEO treated joints on demand. The research focuses on the synthesis, characterization, and application of cerium@polystyrene (Ce@PS) nanocontainers, which are loaded with 8-hydroxyquinoline (8-HQ) to enhance corrosion protection. The synthesis involves several key steps, including the formation of a cerium-based outer layer around polystyrene nanospheres, the selective removal of the polystyrene core to create a porous structure, and the subsequent loading of the 8-HQ inhibitor. Structural and compositional analyses, conducted using scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDS), confirmed the successful incorporation of 8-HQ within the nanocontainers. Additionally, Fourier-transform infrared spectroscopy (FTIR) provided detailed information about the chemical composition of the organic materials throughout the synthesis process. Thermal decomposition analysis verified the successful fabrication and stability of the dual-shell nanocontainers.</div><div>Corrosion tests on Ti-Mg joints treated with plasma electrolytic oxidation (PEO) coatings and loaded nanocontainers demonstrated significantly improved corrosion resistance compared to untreated joints. This research highlights the potential of dual-shell nanocontainers, containing both organic and inorganic inhibitors, to offer prolonged corrosion protection, particularly against galvanic corrosion in dissimilar joints. The findings suggest that these synthesized nanocontainers hold promise for various industrial applications, particularly in the context of friction stir welded (FSW) Ti-Mg dissimilar joints, providing valuable insights for the development of advanced materials designed to mitigate corrosion.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3589-3601"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mg anode interface engineering in KNO3 electrolyte with sodium 5-sulfosalicylate as an additive for enhanced performance of Mg-air batteries","authors":"Guanhua Lin ,&nbsp;Yaqing Zhou ,&nbsp;Sandrine Zanna ,&nbsp;Antoine Seyeux ,&nbsp;Philippe Marcus ,&nbsp;Jolanta Światowska","doi":"10.1016/j.jma.2024.09.007","DOIUrl":"10.1016/j.jma.2024.09.007","url":null,"abstract":"<div><div>The Mg-air batteries face limitations with pronounced hydrogen evolution and low anodic utilization efficiency from Mg anodes in conventional NaCl electrolytes. The corrosion performance, surface composition, and discharge properties of commercial purity Mg anodes were thoroughly investigated in KNO₃ electrolytes with and without sodium 5-sulfosalicylate and compared to NaCl electrolyte. The addition of sodium 5-sulfosalicylate to KNO₃-based electrolyte results in efficient inhibition of H₂ evolution, consequently enhancing anodic utilization efficiency to 84% and specific capacity to 1844 mAh/g, compared to NaCl (24% and 534 mAh/g, respectively) under discharge condition of 10 mA/cm² in half cell. Furthermore, the chelating ability of sodium 5-sulfosalicylate can significantly improve the Mg surface dissolution kinetics and discharge product deposition rate at the Mg anode / electrolyte interface, yielding formation of a thinner discharge layer as confirmed by time-of-flight secondary ion mass spectrometry. The discharge voltage is increased to 1.60 V, compared to 1.35 V in KNO₃ at 0.5 mA/cm² in full cell. However, higher concentration of sodium 5-sulfosalicylate can accelerate Mg anode dissolution, impeding the improvement of anodic utilization efficiency, specific capacity, and energy density. Hence, determining optimal additive concentration and current density is crucial for enhancing the discharge properties of Mg-air batteries and mitigating excessive Mg dissolution in chloride-free electrolytes.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 9","pages":"Pages 3646-3660"},"PeriodicalIF":15.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}