Journal of Magnesium and Alloys最新文献_第7页

Tailoring bimodal grain structure to achieve simultaneous improvement of strength and ductility in magnesium alloys at cryogenic temperatures 定制双峰晶粒结构，同时提高镁合金在低温下的强度和延展性

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.09.015

Jing Zuo , Taiki Nakata , Chao Xu , Mingquan Zhang , Enyu Guo , Kunkun Deng , Kaibo Nie , Xiaojun Wang , Shigeharu Kamado , Lin Geng

Magnesium (Mg) alloys typically suffer from cold brittleness at cryogenic temperatures (CT), where strength significantly increases and ductility decreases with decreasing temperature. This study investigates the improvement of the strength-ductility balance at CT in Mg-3.6Y (wt.%) alloys with a bimodal grain structure, consisting of fine dynamically recrystallized (DRXed) grains and elongated unDRXed grains. The results demonstrate that the sample with ∼50% DRXed region fraction achieves a remarkable strength-ductility synergy at CT. Dislocation strengthening in the unDRXed regions and grain boundary strengthening in the DRXed regions increase the tensile yield strength (TYS) by 1.6 times at CT compared to room temperature (RT). Concurrently, activation of {10

\bar{1}

2} tensile twinning and non-basal slip systems in DRXed regions, including prismatic 〈a〉 and pyramidal I 〈c + a〉 slips, along with abnormal pyramidal slip within unDRXed grains, reduces fracture elongation by only 1% relative to RT. Furthermore, the bimodal grain structure effectively alleviates strain localization through strain partitioning between DRXed and unDRXed grains, leading to the formation of interface-affected zones (IAZs) that promote the accumulation of geometrically necessary dislocations (GNDs) and enhance hetero-deformation-induced (HDI) hardening. At CT, the IAZs become wider and more pronounced, indicating enhanced GND accumulation that promotes stronger strain partitioning and more effective HDI strengthening. This work demonstrates that the bimodal grain structure is an effective approach to overcoming the low-temperature brittleness of Mg alloys, providing valuable insights for the design of high-performance materials for cryogenic applications.

镁合金在低温（CT）下具有典型的冷脆性，随着温度的降低，强度显著增加，延展性降低。本文研究了由细小动态再结晶（DRXed）晶粒和伸长动态再结晶（unrxed）晶粒组成的双峰晶型Mg-3.6Y （wt.%）合金在CT下强度-塑性平衡的改善。结果表明，含有~ 50% DRXed区域分数的试样在CT处具有显著的强度-延性协同效应。在室温下，unDRXed区域的位错强化和DRXed区域的晶界强化使合金的抗拉屈服强度提高了1.6倍。同时，DRXed区域{101¯2}拉伸孪晶和非基底滑移系统的激活，包括棱柱形< a >和锥体形< c + a >滑移，以及unDRXed晶粒内部异常锥体滑移，使断裂伸长率相对于室温仅降低1%。此外，双峰型晶粒结构通过DRXed和unDRXed晶粒之间的应变分配有效缓解了应变局部化。导致界面影响区（IAZs）的形成，从而促进几何必要位错（GNDs）的积累，并增强异质变形诱导（HDI）硬化。在CT处，iaz变得更宽更明显，表明GND积累增强，促进了更强的应变分配和更有效的HDI强化。该研究表明，双峰晶粒结构是克服镁合金低温脆性的有效方法，为高性能低温材料的设计提供了有价值的见解。

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引用次数: 0

Advances in magnesium spinel ferrites for photocatalytic degradation of methylene blue: Challenges and future prospectives 光催化降解亚甲基蓝的镁尖晶石铁氧体研究进展：挑战与展望

IF 17.6 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.10.021

, Rohit Jasrotia, Aman Grover, Anand Somvanshi, Shadma Wahab, Mohammad Ali Abdullah Almoyad, , Gaurav Katoch, Radheshyam Rai

Spinel ferrites have been found to be a promising material for water purification because of their large surface area, tunable traits, high chemical stability and excellent magnetic traits. Their multifunctionality and ease of magnetic separation enable rapid adsorption and efficient decomposition of contaminants, including dyes, pharmaceuticals, and heavy metals. Furthermore, MgFe₂O₄ and its carbon-based composites exhibit strong photocatalytic activity under visible and UV light, generating reactive radicals for effective pollutant degradation. Despite these advantages, their practical application remains constrained by an incomplete understanding of adsorption and degradation mechanisms. This paper highlights key variables that influence photocatalytic efficiency, including pH, pollutant concentration, and reaction time, while also examining the role of synthesis strategies, elemental substitutions, and surface modifications in enhancing efficiency. In addition, this review paper focuses on the different fabrication approach, decomposition of methylene blue dye by photocatalysis, research gap, and the application of MgFe₂O₄.

尖晶石铁氧体具有表面积大、可调、化学稳定性高、磁性好等优点，是一种很有前途的水净化材料。它们的多功能性和易于磁分离，可以快速吸附和有效分解污染物，包括染料，药物和重金属。此外，MgFe2O4及其碳基复合材料在可见光和紫外光下表现出较强的光催化活性，产生活性自由基，有效降解污染物。尽管有这些优点，但它们的实际应用仍然受到对吸附和降解机制的不完全理解的限制。本文强调了影响光催化效率的关键变量，包括pH值、污染物浓度和反应时间，同时也研究了合成策略、元素取代和表面修饰在提高效率方面的作用。此外，本文还对不同的制备方法、亚甲基蓝染料的光催化分解、研究进展以及MgFe2O4的应用进行了综述。

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引用次数: 0

Superplastic deformation mechanisms of coarse-grained rolled Mg-4Y-3RE magnesium alloy 粗粒轧制 Mg-4Y-3RE 镁合金的超塑性变形机制

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2024.11.006

Dexi Xu , Xinxi Liu , Huiping Wu , Dayong An , Qi Hu , Xifeng Li , Jun Chen

The Mg-4Y-3RE (WE43) magnesium alloy possesses significant advantages such as high specific strength, excellent shock absorption, strong electromagnetic shielding capabilities and recyclability. However, its close-packed hexagonal structure leads to poor plasticity at room temperature, which limits its broader engineering applications. Therefore, superplastic forming at high temperatures is used to manufacture the components from this alloy. This study conducted tensile tests on hot-rolled WE43 rare-earth magnesium alloy with coarse grains at various temperatures and strain rates. The high-temperature superplastic properties were characterized, revealing the intrinsic mechanisms of thermal deformation behavior. The results indicate that the best superplasticity is achieved at 460 °C. This is attributed to the smallest grain size, the weakest texture, and the relatively uniform distribution of the second phase at this temperature. The influence of strain rate on elongation at temperatures among 440 °C∼500 °C is not significant as the impact of strain rate is multifaceted. Meanwhile, the elongation can reach up to 367.7 ± 3.7% at a strain rate of 0.01s⁻¹, which exhibits the high strain rate superplasticity (HSRS). Under these conditions, the deformation of coarse-grained WE43 rare-earth magnesium alloy is controlled by grain boundary sliding (GBS) and solute drag dislocation creep. Furthermore, the GBS involves deformation coordination mechanisms such as grain boundary diffusion, lattice diffusion, dislocation climbing, and dynamic recrystallization accommodation mechanisms.

Mg-4Y-3RE (WE43)镁合金具有显著的优点，如比强度高、吸震性能好、电磁屏蔽能力强和可回收利用。然而，其紧密堆积的六方结构导致室温下塑性较差，限制了其更广泛的工程应用。因此，人们采用高温超塑性成形来制造这种合金的部件。本研究对具有粗晶粒的热轧 WE43 稀土镁合金在不同温度和应变率下进行了拉伸试验。对高温超塑性能进行了表征，揭示了热变形行为的内在机制。结果表明，在 460 ℃ 时达到最佳超塑性。这归因于该温度下晶粒尺寸最小、质地最弱以及第二相分布相对均匀。在 440 °C∼500 °C 温度范围内，应变速率对伸长率的影响并不显著，因为应变速率的影响是多方面的。同时，在应变速率为 0.01s-1 时，伸长率可达 367.7 ± 3.7 %，表现出高应变速率超塑性（HSRS）。在这些条件下，粗晶粒 WE43 稀土镁合金的变形受晶界滑动（GBS）和溶质拖曳位错蠕变控制。此外，GBS 还涉及变形协调机制，如晶界扩散、晶格扩散、位错攀升和动态再结晶容纳机制。

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引用次数: 0

The performance degradation of MAO/GPTMS coating on magnesium alloy under combined corrosive environment and cyclic loading 复合腐蚀环境和循环载荷作用下镁合金MAO/GPTMS涂层性能的退化

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.07.001

Shuya Mao , Di Mei , Weizheng Cui , Mengyao Liu , Jiale Xu , Shijie Zhu , Liguo Wang , Shaokang Guan

Magnesium alloys hold promise as biodegradable orthopedic implants but suffer from rapid corrosion and poor corrosion fatigue performance. This study evaluates the efficacy of a micro-arc oxidation (MAO) layer combined with 3-glycidyloxypropyltrimethoxysilane (GPTMS) sealing in enhancing the corrosion fatigue behavior of ZE21B magnesium alloy in Hanks’ Balanced Salt Solution (HBSS). Electrochemical testing revealed a two-order-of-magnitude reduction in corrosion current density compared to bare alloy, while immersion tests demonstrated sustained protection against degradation. Corrosion fatigue experiments under cyclic loading showed stress-dependent performance: the composite coating improved fatigue life at low stress amplitudes (60 MPa) by mitigating corrosion pit formation, but interfacial weakness between GPTMS and MAO layers reduced performance at high stresses (90–80 MPa). Fractographic analysis identified asynchronous deformation and stress gradient-dependent coating spallation as key failure modes. These results provide mechanistic insights into coating degradation pathways and offer design strategies for developing robust surface modification systems to advance magnesium-based orthopedic applications.

镁合金有望成为生物可降解的骨科植入物，但其腐蚀速度快，腐蚀疲劳性能差。本研究评价了微弧氧化（MAO）层与3-缩水甘油酯氧基丙基三甲氧基硅烷（GPTMS）密封对ZE21B镁合金在汉克斯平衡盐溶液（HBSS）中腐蚀疲劳性能的改善效果。电化学测试显示，与裸合金相比，腐蚀电流密度降低了两个数量级，而浸泡测试则显示了持久的抗降解保护。循环加载下的腐蚀疲劳实验显示出应力依赖性：复合涂层通过减少腐蚀坑的形成提高了低应力幅值（60 MPa）下的疲劳寿命，但GPTMS和MAO层之间的界面弱点降低了高应力（90-80 MPa）下的疲劳寿命。断口分析发现，非同步变形和应力梯度相关的涂层剥落是主要的失效模式。这些结果为涂层降解途径提供了机理见解，并为开发强大的表面改性系统提供了设计策略，以推进镁基骨科应用。

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引用次数: 0

Multi-physics modeling of laser melted magnesium alloy: Bridging melt pool dynamics to microstructure evolution 激光熔化镁合金的多物理场建模：连接熔池动力学与微观结构演变

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.06.032

Junying Liu , Xuehua Wu , Dongsheng Wang , Chunrong Pan , Renkai Huang , Fang Deng , Cijun Shuai , Joseph Buhagiar , Jing Bai , Youwen Yang

Laser powder bed fusion (LPBF) has revolutionized modern manufacturing by enabling high design freedom, rapid prototyping, and tailored mechanical properties. However, optimizing process parameters remains challenging due to the trial-and-error approaches required to capture subtle parameter-microstructure relationships. This study employed a multi-physics computational framework to investigate the melting and solidification dynamics of magnesium alloy. By integrating the discrete element method for powder bed generation, finite volume method with volume of fluid for melt pool behavior, and phase-field method for microstructural evolution, the critical physical phenomena, including powder melting, molten pool flow, and directional solidification were simulated. The effects of laser power and scanning speed on temperature distribution, melt pool geometry, and dendritic morphology were systematically analyzed. It was revealed that increasing laser power expanded melt pool dimensions and promoted columnar dendritic growth, while high scanning speeds reduced melt pool stability and refined dendritic structures. Furthermore, Marangoni convection and thermal gradients governed solute redistribution, with excessive energy input risking defects such as porosity and elemental evaporation. These insights establish quantitative correlations between process parameters, thermal history, and microstructural characteristics, providing a validated roadmap for LPBF-processed magnesium alloy with tailored performance.

激光粉末床熔合（LPBF）通过实现高设计自由度、快速成型和定制机械性能，彻底改变了现代制造业。然而，优化工艺参数仍然具有挑战性，因为需要采用反复试验的方法来捕捉细微的参数-微观结构关系。本研究采用多物理场计算框架研究镁合金的熔化和凝固动力学。结合粉末床生成的离散元法、熔池行为的有限体积法和微观组织演变的相场法，对粉末熔化、熔池流动和定向凝固等关键物理现象进行了模拟。系统分析了激光功率和扫描速度对熔池温度分布、熔池几何形状和枝晶形貌的影响。结果表明，激光功率的增加扩大了熔池尺寸，促进了柱状枝晶的生长，而高扫描速度降低了熔池稳定性，细化了枝晶结构。此外，马兰戈尼对流和热梯度控制着溶质的再分配，过多的能量输入可能会导致孔隙度和元素蒸发等缺陷。这些见解建立了工艺参数、热历史和微观结构特征之间的定量相关性，为lpbf加工镁合金提供了定制性能的有效路线图。

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引用次数: 0

Coordinated control of drug release and corrosion resistance for 3D-printed porous Mg alloy in bone implant applications 3d打印多孔镁合金在骨植入物中的药物释放和耐腐蚀性的协调控制

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.09.024

Jiaping Han , Jingpeng Xia , Hao Zhang , Wanyu Zhao , Hongshan San , Yan Liu , Jirui Ma , Maria Serdechnova , Wojciech Simka , Xiaopeng Lu , Carsten Blawert , Mikhail L. Zheludkevich , Hui Chen

The advent of three-dimensional (3D) printed porous Mg alloys is considered a significant milestone in the development of metal-based degradable implants. However, the poor corrosion resistance of additively manufactured Mg alloys, along with the occurrences of inflammation and bacterial infections following implantation, pose critical challenges. In this study, two drug-loaded coatings were prepared within a porous Mg alloy using in situ incorporation and post-deposition of layered double hydroxides (LDHs) to enhance corrosion resistance, antibacterial properties, and biological compatibility combined with plasma electrolytic oxidation (PEO). The results revealed that in situ incorporation of LDH capsules effectively reduced the porosity of the PEO layer and improved the long-term corrosion resistance of the coating. The post-deposited LDH layer effectively sealed the PEO layer, demonstrating highly stable corrosion resistance during 7 d electrochemical impedance spectroscopy (EIS) test, with the impedance modulus at 10^–2 Hz stabilizing at 5 × 10⁵ Ω·cm². After soaking, the surface morphology of the in situ drug-loaded PEO coating exhibited more cracks and defects, whereas the PEO-LDH coating maintained a relatively dense morphology. Among the tested samples, the PEO-LDH coating showed the best performance in terms of corrosion resistance, cell proliferation and differentiation capabilities, and antibacterial efficacy (>99%). Its strong compatibility with the porous structure of 3D-printed Mg alloy highlights the potential of this coating system for biomedical applications. The design strategy proposed in this study offers valuable insights for future development of drug-loaded coatings for 3D-printed porous materials.

三维（3D）打印多孔镁合金的出现被认为是金属基可降解植入物发展的一个重要里程碑。然而，增材制造镁合金的耐腐蚀性差，以及植入后的炎症和细菌感染的发生，构成了严峻的挑战。在这项研究中，通过原位掺入和后沉积层状双氢氧化物（LDHs）在多孔镁合金中制备了两种载药涂层，以增强抗腐蚀性能、抗菌性能和生物相容性，并结合等离子体电解氧化（PEO）。结果表明，LDH胶囊的原位掺入有效降低了PEO层的孔隙率，提高了涂层的长期耐腐蚀性。后沉积的LDH层有效地密封了PEO层，在7 d电化学阻抗谱（EIS）测试中显示出高度稳定的耐腐蚀性，10-2 Hz时的阻抗模量稳定在5 × 105 Ω·cm2。浸泡后，原位载药PEO涂层表面形貌出现了更多的裂纹和缺陷，而PEO- ldh涂层则保持了相对致密的形貌。PEO-LDH涂层在耐腐蚀、细胞增殖和分化能力、抗菌效果等方面表现最佳（99%）。它与3d打印镁合金的多孔结构的强兼容性突出了这种涂层系统在生物医学应用中的潜力。本研究提出的设计策略为3d打印多孔材料的载药涂层的未来发展提供了有价值的见解。

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引用次数: 0

The mechanism of pre-twinning on enhancing strength of AZ31 magnesium alloy 预孪生提高AZ31镁合金强度的机理

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.09.026

Chen Li , Wei Liang , Lifei Wang , Quanxin Shi , Peng Lin , Xing Zhang , Wanggang Zhang , Shuyong Jiang

A strong basal texture is typically developed in magnesium alloy sheets that have been subjected to the rolling process. Consequently, their mechanical properties and formability are significantly impaired, which in turn restricts potential applications. In this study, an innovative texture-altering technique, which involves in-plane free compression and width-constrained rolling (FCWR), is used for AZ31 alloy sheets in order to manufacture magnesium alloy sheets with both high strength and high ductility. During FCWR deformation process, a substantial number of tensile twins and a small quantity of (10

\overline{1}

2) - (01

\bar{1}

2) twin-twin boundaries are induced to coordinate plastic deformation. It is precisely the presence of such crossed twins that impedes the detwinning of partial twins under low-stress conditions. The retained twins hinder the motion of dislocation, thereby enhancing the strength. Specifically, the yield strength of preset crossed twins sample along rolling direction, 45° and transverse direction has increased by 105 %, 16.8 % and 23 %, respectively. Additionally, the ultimate tensile strength along these three directions has increased by 42.7 %, 25.5 % and 34.8 %, respectively. The twin boundaries in FCWR sample consist of steps, which correspond to basal - prismatic (BP/PB) boundaries that connect straight terraces which are parallel to theoretical {10

\bar{1}

2} twin boundaries. Furthermore, as the number of processing passes increases, the step features become more pronounced. Compared with the as-received sample, the YS enhancement in the sample prepared via the second pass of the FCWR process is attributed to two primary mechanisms: grain refinement strengthening contributes 61 MPa, while dislocation strengthening accounts for 90 MPa.

经过轧制处理的镁合金板材通常会形成坚固的基底织构。因此，它们的机械性能和成形性明显受损，这反过来又限制了潜在的应用。在本研究中，采用一种创新的面内自由压缩和宽度约束轧制（FCWR）的织构改变技术，用于AZ31合金板材，以制造高强度和高塑性的镁合金板材。在FCWR变形过程中，诱导大量的拉伸孪晶和少量的(101 - 1 - 2)-（011¯1 - 2）孪晶边界协调塑性变形。正是这种交叉双胞胎的存在阻碍了部分双胞胎在低应力条件下的确定。保留的孪晶阻碍了位错的运动，从而增强了强度。其中，预制交叉孪晶试样沿轧制方向、45°方向和横向的屈服强度分别提高了105 %、16.8 %和23 %。三个方向的抗拉强度分别提高了42.7 %、25.5 %和34.8 %。FCWR样品中的孪晶界由台阶组成，这些台阶对应于连接平行于理论{101¯1¯2}孪晶界的直阶地的基底-棱柱（BP/PB）边界。此外，随着处理次数的增加，步进特征变得更加明显。与接收样品相比，经二次ffcwr工艺制备的样品的YS增强主要有两个机制：晶粒细化强化贡献61 MPa，位错强化贡献90 MPa。

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引用次数: 0

Enhancing hydrogen storage performance of MgH2 with hollow Bi2Ti2O7 catalyst: Synergistic effects of Bi2Mg3 alloy phase and Ti polyvalency 空心Bi2Ti2O7催化剂增强MgH2储氢性能：Bi2Mg3合金相与Ti多价的协同效应

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.06.014

Xiaoying Yang , Xinqiang Wang , Ruijie Liu , Yanxia Liu , Zhenglong Li , Wengang Cui , Fulai Qi , Yaxiong Yang , Jian Chen , Hongge Pan

The role of catalysts in enhancing the hydrogen storage kinetics of the Mg/MgH₂ system is pivotal. However, the exploration of efficient catalysts and the underlying principles of their design remain both a prominent focus and a significant challenge in current research. In this study, we present a bimetallic oxide of Bi₂Ti₂O₇ hollow sphere as a highly effective catalyst for MgH₂. As a result, the Bi₂Ti₂O₇-catalyzed Mg/MgH₂ system lowers the hydrogen desorption initiation temperature to 194.3 °C, reduces the peak desorption temperature to 245.6 °C, decreases the dehydrogenation activation energy to 82.14 kJ·mol⁻¹, and can absorb 5.4 wt. % of hydrogen within 60 s at 200 °C, demonstrating outstanding hydrogen ab/desorption kinetics, compared to pure MgH₂. Additionally, it can maintain a high hydrogen capacity of 5.2 wt. %, even after 50 dehydrogenation cycles, showing good cycle stability. The characterization results show that the high-valent Bi and Ti in Bi₂Ti₂O₇ are reduced to their low-valent or even zero-valent metallic states during the dehydrogenation and hydrogenation process, thus establishing an in-situ multivalent and multi-element catalytic environment. Density functional theory calculations further reveal that the synergistic effects between Bi and Ti in the Bi-Ti mixed oxide facilitate the cleavage of Mg-H bonds and lower the kinetic barrier for the dissociation of hydrogen molecules, thereby substantially enhancing the kinetics of the Mg/MgH₂ system. This study presents a strategic method for developing efficient catalysts for hydrogen storage materials by harnessing the synergistic effects of metal elements.

催化剂在提高Mg/MgH2体系储氢动力学中的作用至关重要。然而，探索高效催化剂及其设计的基本原理仍然是当前研究的一个突出焦点和重大挑战。在这项研究中，我们提出了一种Bi2Ti2O7空心球双金属氧化物作为MgH2的高效催化剂。结果表明，bi2ti2o7催化的Mg/MgH2体系脱氢起始温度降至194.3℃，脱氢峰温度降至245.6℃，脱氢活化能降至82.14 kJ·mol−1，在200℃条件下60 s内可吸附5.4 wt. %的氢，与纯MgH2相比，表现出优异的氢ab/脱附动力学。此外，即使在50次脱氢循环后，它也能保持5.2 wt. %的高氢容量，表现出良好的循环稳定性。表征结果表明，Bi2Ti2O7中的高价Bi和Ti在脱氢和加氢过程中被还原为低价甚至零价金属态，从而建立了原位多价多元素催化环境。密度泛函理论计算进一步揭示了Bi-Ti混合氧化物中Bi和Ti之间的协同作用促进了Mg- h键的断裂，降低了氢分子解离的动力学势垒，从而大大增强了Mg/MgH2体系的动力学。本研究提出了一种利用金属元素的协同效应开发储氢材料高效催化剂的战略方法。

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引用次数: 0

Hierarchical bioinspired nanocontainer for magnesium alloys: Effective corrosion inhibition and antifouling 用于镁合金的层次化生物纳米容器：有效的缓蚀和防污

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.07.008

Xinfang Zhang , Dashuang Wang , Shupei Liu , Xiaobin Gong , Haixu Wang , Chuan Jing , Dan Zeng , Huan Zhou , Shibo Chen , Yuxin Zhang

Nowadays, despite advancements in anticorrosion technologies, the application of magnesium (Mg) alloys in marine environments continues to encounter significant challenges in corrosion protection against biofouling. Given the limitations of single-component materials, achieving a synergistic protective effect is a critical requirement. This study proposes a multistage slow-release system to fabricate a composite of multistage nanocontainers based on a three-dimensional (3D) bio-template. Specifically, the design integrates the coupling of multiple nanocontainers to leverage the synergistic effects of multistage retardation. The M-CeO₂-LDH/DE coating leverages the porous loading capability of DE, the responsive release function of LDH, and the redox activity of CeO₂, resulting in a significant enhancement of anticorrosion performance while effectively inhibiting the adhesion of sulfate-reducing bacteria (SRB) and Chlorella vulgaris. Furthermore, the study elucidates the effects of multistage nanocontainers on the anticorrosion and antifouling properties of magnesium alloy coatings, as well as the potential mechanism for multistage slow-release protection. As a result, the coating achieved an antimicrobial efficiency of 98.85 % at a corrosion inhibitor loading of 24.9 wt.%, while the corrosion current density at the scratches decreased from 25.2 µA·cm⁻² to -12.5 µA·cm⁻². The M-CeO₂-LDH/DE coating integrates highly effective corrosion resistance, biofouling protection, and excellent mechanical properties. DFT calculations model the varying adsorption behavior of 2-MBI and confirm the multistage release mechanism of the nanocontainer for the corrosion inhibitor. This study not only introduces innovative strategies for developing high-performance protective coatings but also establishes a robust foundation for the broader application of magnesium alloys in marine environments, underscoring their significant potential for engineering applications.

如今，尽管防腐技术取得了进步，但镁合金在海洋环境中的应用仍然遇到了许多困难。

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引用次数: 0

Advances toward self-healing coatings on Mg alloys for active corrosion protection 镁合金活性腐蚀自修复涂层研究进展

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-12-01 DOI: 10.1016/j.jma.2025.09.012

Xingxing Zhou , Jie Xin , Cheng Wang , Kun Qian , Xuewei Tao , Zhixin Ba , Feng Xue , Jing Bai , Bertram Mallia , Qiangsheng Dong

Magnesium (Mg) alloys with high specific strength, light weight, and natural biodegradability are promising candidates for applications in automotive industry and biodegradable medical devices. However, their wide employment is hindered by their rapid corrosion behavior. Protective coatings provide a potential approach to extending the service period, but damage to these coatings often leads to local corrosion and even premature failure. To address this issue, self-healing coatings have been developed for providing long-term and reliable protection, even in the presence of defects. This paper summarizes recent progress in self-healing coatings on Mg alloys, with a focus on their uni- and multi-stimuli responsive mechanisms. A typical self-healing coating is composed of a physical layer, inhibitors, and inhibitor containers. Herein, the loading and release of inhibitors are crucial for the design of self-healing coatings. On the one hand, inhibitors can be directly doped/filled into the protective layer and released in response to environmental changes and coating degradation. On the other hand, inhibitors may be encapsulated into micro/nano-containers and released upon being triggered by ions, pH, light, heat, potential and moisture. Additionally, this review presents advanced characterization techniques and systematic evaluation methods for assessing self-healing functionality. Ultimately, the emerging challenges and research priorities in the development of self-healing coatings for Mg alloys are comprehensively discussed.

镁合金具有高比强度、重量轻和天然生物可降解性，是汽车工业和生物可降解医疗设备的有前途的候选者。然而，它们的快速腐蚀行为阻碍了它们的广泛应用。保护涂层提供了一种延长使用寿命的潜在方法，但这些涂层的损坏通常会导致局部腐蚀甚至过早失效。为了解决这个问题，自修复涂层已经被开发出来，即使在存在缺陷的情况下也能提供长期可靠的保护。本文综述了镁合金自修复涂层的研究进展，重点介绍了镁合金自修复涂层的单刺激和多刺激响应机制。典型的自修复涂层由物理层、抑制剂和抑制剂容器组成。因此，抑制剂的加载和释放对自修复涂层的设计至关重要。一方面，抑制剂可以直接掺杂/填充到保护层中，并根据环境变化和涂层降解释放。另一方面，抑制剂可以被封装到微/纳米容器中，并在离子、pH、光、热、电位和水分的触发下释放。此外，本文还介绍了先进的表征技术和评估自愈功能的系统评估方法。最后，全面讨论了镁合金自修复涂层发展中面临的新挑战和研究重点。

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