Jiamin Li , Meng Huang , Juan Hou , Xingbin Wang , Gaopeng Xu , Yi Yang , Ning Mo , Yun Shi , Laichang Zhang , Weineng Tang
{"title":"Excellent strength-ductility synergy property of wire-arc additively manufactured Mg-Gd-Y-Zr alloy investigated by heat treatment","authors":"Jiamin Li , Meng Huang , Juan Hou , Xingbin Wang , Gaopeng Xu , Yi Yang , Ning Mo , Yun Shi , Laichang Zhang , Weineng Tang","doi":"10.1016/j.jma.2025.03.026","DOIUrl":"10.1016/j.jma.2025.03.026","url":null,"abstract":"<div><div>In this work, the GW63K (Mg-6.54Gd-3.93Y-0.41Zr, wt.%) alloy wire was utilized as the feedstock material and the thin-walled component was fabricated using wire-arc additive manufacturing technology (WAAM). The microstructural evolution during deposition and subsequent heat treatment was explained through multi-scale microstructural characterization techniques, and the impact of heat treatment on the strength-ductility synergy of the deposited alloy was systematically compared. The results showed that the microstructure of the deposited sample was mainly composed of fine equiaxed α-Mg grains and Mg<sub>24</sub>(Gd,Y)<sub>5</sub> phase. The optimized solution heat treatment (450 °<em>C</em> × 2 h) had little effect on the grain size, but can effectively reduce the Mg<sub>24</sub>(Gd,Y)<sub>5</sub> eutectic phase on the grain boundary, resulting in a significant increase in elongation from 13.7% to 26.6%. After peak-aging treatment, the strength of the GW63K alloy increased to 370 MPa, which was significantly higher than the as-built state (267 MPa). The superior strength in this study is attributed to the refinement strengthening imparted by the fine microstructure inherited in the as-built GW63K alloy, as well as the precipitation strengthening due to the formation of dense β' precipitates with a pronounced plate-like aspect ratio.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 3673-3688"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144252556","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}
Yitao Wang , Jianbo Li , Huan Luo , Weizhang Wang , Daiyi Deng , Jianwei Chen , Xianhua Chen , Kaihong Zheng , Fusheng Pan
{"title":"The potential of deformable titanium reinforced magnesium‐matrix composites: A review of preparation, characterization, and performance evaluation","authors":"Yitao Wang , Jianbo Li , Huan Luo , Weizhang Wang , Daiyi Deng , Jianwei Chen , Xianhua Chen , Kaihong Zheng , Fusheng Pan","doi":"10.1016/j.jma.2025.06.027","DOIUrl":"10.1016/j.jma.2025.06.027","url":null,"abstract":"<div><div>Magnesium matrix composites (MMCs) combine exceptional low density, high specific strength, and stiffness, positioning them as critical materials for aerospace, automotive, and electronics industries. This review highlights recent progress in the fabrication of Ti-Mg composites and analyzes the mechanisms behind their enhanced mechanical properties. A key focus is the interfacial deformation incompatibility between Ti and Mg phases, which generates strain gradients and promotes the accumulation of geometrically necessary dislocations (GNDs) at the interface. This process not only improves strain hardening and ductility but also reveals the need for advanced micromechanical models to capture the plastic behavior of both phases. The review critically examines the impact of different Mg matrix types (AZ, AM, VW series) and the role of interfacial product morphology and size on bonding and overall performance. Furthermore, Ti reinforcement endows the composites with superior wear resistance and thermal conductivity, indicating broad application potential.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 3490-3523"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144719582","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}
Reliance Jain , Sandeep Jain , Sheetal Kumar Dewangan , Sumanta Samal , Hansung Lee , Eunhyo Song , Younggeon Lee , Byungmin Ahn
{"title":"Prediction of alloying element effects on the mechanical behavior of high-pressure die-cast Mg-based alloys","authors":"Reliance Jain , Sandeep Jain , Sheetal Kumar Dewangan , Sumanta Samal , Hansung Lee , Eunhyo Song , Younggeon Lee , Byungmin Ahn","doi":"10.1016/j.jma.2025.06.023","DOIUrl":"10.1016/j.jma.2025.06.023","url":null,"abstract":"<div><div>Achieving optimal mechanical performance in high-pressure die-cast (HPDC) Mg-based alloys through experimental methods is both costly and time-intensive due to significant variations in composition. This study leverages machine learning (ML) techniques to accelerate the development of high-performance Mg-based alloys. Data on alloy composition and mechanical properties were collected from literature sources, focusing on HPDC Mg-based alloys. Six ML models—extra trees, CatBoost, k-nearest neighbors, random forest, gradient boosting, and decision tree—were trained to predict mechanical behavior. CatBoost yielded the highest prediction accuracy with R<sup>2</sup> scores of 0.95 for ultimate tensile strength (UTS) and 0.92 for yield strength (YS). Further validation using published datasets reaffirmed its reliability, demonstrating R<sup>2</sup> values of 0.956 (UTS) and 0.936 (YS), MAE of 1% and 2.8%, and RMSE of 1% and 3.5%, respectively. Among these, the CatBoost model demonstrated the highest predictive accuracy, outperforming other ML techniques across multiple optimization metrics.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 3819-3828"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144786561","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}
Kecheng Zhou , Xiaochuan Sun , Hongwei Wang , Xiaodan Zhang , Ding Tang , Weiqin Tang , Yaodong Jiang , Peidong Wu , Huamiao Wang
{"title":"Texture-dependent bending behaviors of extruded AZ31 magnesium alloy plates","authors":"Kecheng Zhou , Xiaochuan Sun , Hongwei Wang , Xiaodan Zhang , Ding Tang , Weiqin Tang , Yaodong Jiang , Peidong Wu , Huamiao Wang","doi":"10.1016/j.jma.2023.02.003","DOIUrl":"10.1016/j.jma.2023.02.003","url":null,"abstract":"<div><div>The relatively insufficient knowledge of the deformation behavior has limited the wide application of the lightest structure material-Mg alloys. Among others, bending behavior is of great importance because it is unavoidably involved in various forming processes, such as folding, stamping, etc. The hexagonal close-packed structure makes it even a strong texture-dependent behavior and even hard to capture and predict. In this regard, the bending behaviors are investigated in terms of both experiments and simulations in the current work. Bending samples with longitudinal directions inclined from the transverse direction by different angles have been prepared from an extruded AZ31 plate, respectively. The moment-curvature curves and strain distribution have been recorded in the four-point bending tests assisted with an <em>in-situ</em> digital image correlation (DIC) system. A crystal-plasticity-based bending-specific approach named EVPSC-BEND was applied to bridge the mechanical response to the microstructure evolution and underlying deformation mechanisms. The flow stress, texture, twin volume fraction, stress distribution, and strain distribution evolve differently from sample to sample, manifesting strong texture-dependent bending behaviors. The underlying mechanisms associated with this texture dependency, especially the occurrence of both twinning and detwinning during the monotonic bending, are carefully discussed. Besides, the simulation has been conducted to reveal the moment-inclination angle relation of the investigated AZ31 extruded plate in terms of the polar coordinate, which intuitively shows the texture-dependent behaviors. Specifically, the samples with longitudinal directions parallel to the extruded direction bear the biggest initial yielding moment.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 3617-3631"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42941982","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}
Wenbo Luo , Rongsheng Bai , Zhilei Yu , Xiuzhu Han , Tong Guo , Zhiyong Xue , Chen Wen , Mingyue Zheng , Feng Li , Zhihao Lin
{"title":"Unusual tensile strengths and strain-hardening behaviors and their structural correlation of Mg-RE solid solution","authors":"Wenbo Luo , Rongsheng Bai , Zhilei Yu , Xiuzhu Han , Tong Guo , Zhiyong Xue , Chen Wen , Mingyue Zheng , Feng Li , Zhihao Lin","doi":"10.1016/j.jma.2025.04.002","DOIUrl":"10.1016/j.jma.2025.04.002","url":null,"abstract":"<div><div>This study systematically investigates the unusual tensile mechanical behavior of Mg-RE solid solution (SS) alloys, exhibiting anomalous tensile strengths (ATS) and an enhanced strain-hardening rate at high temperature. Both the peak ultimate tensile strength (UTS) and tensile yield strength (TYS) values occur at 150–200 °C, which are 12–50% higher compared to those at room temperature (RT). Meanwhile, the strain-hardening rate increases with the temperature rising from RT to 200 °C during the plastic deformation process. The results reveal that the formation of stacking faults (SFs) and the locking of dislocations, particularly immobile 〈c〉 partial dislocations, enhance resistance to plastic deformation, leading to higher strengths at high temperature. Furthermore, the interactivity between SFs and 〈<em>c</em> + <em>a</em>〉 dislocations intensify with rising of temperature. The presence of RE atoms in the SS plays a critical role in this unique mechanical behavior, as they preferentially occupy non-basal planes rather than basal planes, thereby reducing the stacking fault (SF) formation energy. This study provides new insights into the high-temperature strengthening mechanisms of Mg-RE based alloys, offering potential guidance for the design of advanced lightweight materials with superior mechanical properties.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 4032-4044"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901320","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":"Microstructure evolution and corrosion behavior of TIG welded joint of a new MgGdNdZnZr alloy during post-weld heat treatment","authors":"Xin Tong, Qiman Wang, Guohua Wu, Fangzhou Qi, Junmin Zhan, Liang Zhang","doi":"10.1016/j.jma.2024.04.019","DOIUrl":"10.1016/j.jma.2024.04.019","url":null,"abstract":"<div><div>The corrosion behavior of the tungsten inert gas (TIG) welded Mg<img>3Nd<img>3Gd<img>0.2Zn<img>0.5Zr alloy with different post-weld heat treatments was systematically investigated. The results show that the corrosion resistance of the sand-cast base material (BM) was inferior to that of the fusion zone (FZ), which was attributed to the larger grain size and exacerbated galvanic corrosion caused by coarser Mg<sub>3</sub>(Nd, Gd) eutectic phases and numerous <em>β</em> precipitates. It is found that post-weld solid-solution (T4) treatment could significantly enhance the corrosion resistance of the joint due to the dissolution of the cathodic second phases and the denser protective film abundant in RE oxides generated in corrosive solution. The precipitation of nanosized phases and Zn<img>Zr clusters would slightly increase the susceptibility to localized corrosion of the peak-aged (T6) joint. As the main corrosion products, MgO and Mg(OH)<sub>2</sub> are distributed throughout the whole corrosion film, while RE oxides and RE hydroxides are mainly distributed in the inner layer, which can be explained by inward oxidation and replacement reactions between RE elements and MgO/Mg(OH)<sub>2</sub>. Based on the composition and structure of the corrosion product film, a physical model has been proposed for depicting the microstructure evolution associated with the corresponding corrosion behavior of the joints. This work could promote the applications of welded Mg<img>RE alloy joint in some corrosion environments.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 3798-3818"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141048346","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}
Jianzeng Ren , Zhou Jiang , Jianbing He , Xiaoying Wang , Weihong Jin , Zhentao Yu
{"title":"Current status and perspectives on design, fabrication, surface modification, and clinical applications of biodegradable magnesium alloys","authors":"Jianzeng Ren , Zhou Jiang , Jianbing He , Xiaoying Wang , Weihong Jin , Zhentao Yu","doi":"10.1016/j.jma.2025.07.006","DOIUrl":"10.1016/j.jma.2025.07.006","url":null,"abstract":"<div><div>Biodegradable metals have garnered considerable interest owing to their capacity for self-degradation following the repair of damaged tissues. This review commences with their historical development and clarifies the essential prerequisites for their successful clinical translation. Subsequently, a detailed review of magnesium-based materials is presented from five critical areas of alloying, fabrication techniques, purification, surface modification, and structural design, systematically addressing their progress in biodegradation rate retardation, mechanical reinforcement, and biocompatibility enhancement. Furthermore, recent breakthroughs <em>in vivo</em> animal experiments and clinical translation of magnesium alloys are summarized. Finally, this review concludes with a critical assessment of the achievements and challenges encountered in the clinical application of these materials, and proposes practical strategies to address current limitations and guide future research perspectives.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 3564-3595"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110217","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}
Haiyi Wan , Lei Ran , Heng Lu , Junqi Qiu , Huanrui Zhang , Ying Yang , Yu'an Chen , Jingfeng Wang , Fusheng Pan
{"title":"Optimizing microstructure and enhancing hydrogen storage properties in Mg alloy via tailoring Ni and Si element","authors":"Haiyi Wan , Lei Ran , Heng Lu , Junqi Qiu , Huanrui Zhang , Ying Yang , Yu'an Chen , Jingfeng Wang , Fusheng Pan","doi":"10.1016/j.jma.2024.01.014","DOIUrl":"10.1016/j.jma.2024.01.014","url":null,"abstract":"<div><div>The inherent thermodynamic and kinetic challenges of Mg/MgH<sub>2</sub> hydrogen storage materials pose significant obstacles to their development. Alloying has emerged as a highly promising strategy to overcome these challenges. In this study, we synthesized a series of Mg<sub>93</sub><img>Ni<sub>7-<em>x</em></sub>-Si<sub><em>x</em></sub> (<em>x</em> = 0.4, 1.6, 5) ternary alloys through microstructure optimization and particle refinement using melting and high energy ball milling techniques. We systematically investigated the effects of varying Ni and Si content on the microstructure and hydrogen storage properties of Mg-Ni-Si alloys. The results demonstrate that variations in Ni and Si content leads to the formation of different types of intermetallic compounds within the alloys, thereby influencing their hydrogen storage properties. Among the tested alloys, Mg<sub>93</sub>Ni<sub>2</sub>Si<sub>5</sub> exhibits superior activation and hydrogen absorption properties. The enhanced hydrogenation performance can be attributed to the precipitation of the Mg<sub>2</sub>Si phase resulting from increased Si content, as well as the refinement of the Mg<sub>2</sub>Ni<sub>3</sub>Si phase and the increase in eutectic structure Mg+Mg<sub>11</sub>Ni<sub>12</sub>Si<sub>10</sub>. Significantly, the increased intermetallic compounds provide a large number of sites and channels for the nucleation of hydrides as well as the diffusion of hydrogen. During the dehydrogenation process, Ni, serves as the predominant catalytic species, effectively promotes the dissociation of hydrogen and enhances the reaction kinetics. As a result, the hydrogen desorption of the hydrogenated Mg<sub>93</sub>Ni<sub>6.6</sub>Si<sub>0.4</sub> alloy initiates at 180 °C, with a reduced activation energy of 105.21 kJ/mol. These findings underscore the synergistic and effective roles of Ni and Si elements in enhancing the hydrogen storage properties of Mg-based materials, thus supporting the development of economically viable and promising Mg-based solid-state hydrogen storage materials.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 3784-3797"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139696326","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}
Miao Cheng , Yabing Li , Jiaming Shi , Qianqian Liu , Ruirui Wang , Wujun Ma , Bo Liu , Muzi Chen , Wanfei Li , Yuegang Zhang
{"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":"10.1016/j.jma.2024.12.003","url":null,"abstract":"<div><div>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)<sub>3</sub>][GaCl<sub>4</sub>]<sub>2</sub> through single-crystal X-ray diffraction analysis. The as-synthesized Mg(GaCl<sub>4</sub>)<sub>2</sub>-IL-DME electrolyte could achieve a high ionic conductivity (9.85 mS cm<sup>−1</sup>), good anodic stability (2.9 V vs. Mg/Mg<sup>2+</sup>), and highly reversible Mg plating/stripping. The remarkable electrochemical performance should be attributed to the in-situ formation of Mg<sup>2+</sup>-conducting Ga<sub>5</sub>Mg<sub>2</sub> 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(GaCl<sub>4</sub>)<sub>2</sub>-IL-DME electrolyte showed excellent compatibility with both conversion and intercalation cathodes. The Mg/S batteries with Mg(GaCl<sub>4</sub>)<sub>2</sub>-IL-DME electrolyte and KB/S cathode showed a high specific capacity of 839 mAh g<sup>−1</sup> after 50 cycles at 0.1 C with the Coulombic efficiency of ∼100%. Moreover, the assembled Mg||Mo<sub>6</sub>S<sub>8</sub> batteries delivered a reversible discharge capacity of 85 mAh g<sup>−1</sup> 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.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 3896-3905"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","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}
Zexuan Yang , Yazhou Wang , Xia Lin , Yongjin Zou , Cuili Xiang , Fen Xu , Lixian Sun , Yong Shen Chua
{"title":"Vanadium induces Ni-Co MOF formation from a NiCo LDH to catalytically enhance the MgH2 hydrogen storage performance","authors":"Zexuan Yang , Yazhou Wang , Xia Lin , Yongjin Zou , Cuili Xiang , Fen Xu , Lixian Sun , Yong Shen Chua","doi":"10.1016/j.jma.2025.01.012","DOIUrl":"10.1016/j.jma.2025.01.012","url":null,"abstract":"<div><div>Magnesium-based hydrogen storage materials, such as MgH<sub>2</sub>, have attracted considerable attention because of its superior hydrogen storage capacities, inexpensive, and excellent reversibility. However, their high thermodynamic stabilities and slow kinetics lead to relatively high desorption temperatures, which severely limit the wide application of MgH<sub>2</sub>. In this study, the inclusion of vanadium induced the formation Ni-Co metal–organic frameworks (MOF) from a NiCo layered double hydroxide (LDH), thereby increasing the number of defects and vacancies, and improving the hydrogen storage properties of MgH<sub>2</sub>. The synthesized NiCo-MOF/V-O-doped MgH<sub>2</sub> system demonstrates excellent hydrogen storage capacity. More specifically, 5 wt.% of H<sub>2</sub> was released over 20 min at a relatively low dehydrogenation temperature of 250 °C, and almost complete dehydrogenation was achieved at 300 °C for 5 min. In addition, at 125 °C, the hydrogen storage material absorbed 5.5 wt.% H<sub>2</sub> in 10 min. Furthermore, the activation energy of dehydrogenation was determined to be 69.588 ± 6.302 kJ ·mol<sup>−1</sup> which is significantly lower than that of the ball-milled MgH<sub>2</sub> (i.e., 118.649 ± 2.825 kJ ·mol<sup>−1</sup>). It was therefore inferred that during dehydrogenation process, a Mg<sub>2</sub>Ni/Mg<sub>2</sub>NiH<sub>4</sub> hydrogen pump is formed by Ni, while the V-H and Co-H bonds formed by Co and V during the reaction act synergistically to catalyze the absorption and desorption of hydrogen, thereby increasing the hydrogen storage capacity of MgH<sub>2</sub>. These experiments provide new perspectives on the commercial application of MgH<sub>2</sub>.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 8","pages":"Pages 4020-4031"},"PeriodicalIF":13.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077169","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}