Journal of Magnesium and Alloys最新文献_第8页

Mechanistic switch in corrosion behavior of magnesium alloy diamond lattice structures induced by argon plasma treatment 氩等离子处理诱导镁合金金刚石晶格结构腐蚀行为的机理转换

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2024.12.021

Viviana M. Posada , Alexandru Marin , Tonny Naranjo , Juan Ramírez , Patricia Fernández-Morales

Advancing 3D magnesium (Mg) development beyond current limitations requires controlling Mg alloy degradation in pre-designed, low-dimension architectures. This study reveals a mechanistic switch in the corrosion behavior of Mg alloy (3.6% Al, 0.8% Zn) diamond lattice structures, induced by plasma nanosynthesis (400 eV Ar⁺ ions, fluence 1 × 10¹⁷ ions/cm²). Plasma treatment of the Mg alloy increases surface Mg from 1.5% to 14.5%, enhances carbonate formation, and generates a nanostructured surface with a Mg carbonate layer over an oxide/hydroxide layer. In vitro and in vivo analyses over 8 wk demonstrate how this treatment fundamentally alters the degradation process and stability of these 3D architectures.

While untreated samples initially formed a protective film that subsequently diminished, DPNS-treated samples demonstrated an inverse corrosion behavior. X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) confirmed the presence of a stable, protective layer composed of magnesium oxide, magnesium hydroxide, and magnesium carbonate on the DPNS-treated surfaces. After 14 days, the DPNS-treated sample exhibited a more positive corrosion potential (-0.69 V versus -1.36 V) and a marginally lower current density (0.73 mA/cm² compared to 0.75 mA/cm²) relative to the control. This protective layer, combined with modified surface topology, initiated a core-to-periphery degradation pattern that maintained structural integrity for up to 8 wk post-implantation. These findings support the conclusion that the DPNS-treated scaffold demonstrates sustained improved corrosion resistance over time compared to the untreated control.

Micro-CT revealed plasma-treated samples retained larger struts (504.9 ± 95.3 µm at 8 wk) and formed larger H₂ pockets extending 14.2 mm from the implant center, versus 4.9 mm in controls. This corrosion behavior switch enhances stability but risks pore clogging, offering insights for tailoring Mg alloy degradation and H₂ evolution in 3D architectures for biomedical applications.

推进3D镁（Mg）技术的发展，需要在预先设计的低维结构中控制镁合金的降解。本研究揭示了等离子体纳米合成（400 eV Ar+离子，影响1 × 1017离子/cm2）诱导的镁合金（3.6% Al, 0.8% Zn）金刚石晶格结构腐蚀行为的机制转换。等离子体处理将镁合金表面Mg含量从1.5%提高到14.5%，促进了碳酸盐的形成，并在氧化/氢氧化物层上形成了碳酸盐层的纳米结构表面。超过8周的体外和体内分析证明了这种处理如何从根本上改变这些3D结构的降解过程和稳定性。而未经处理的样品最初形成保护膜，随后减少，dpns处理的样品表现出相反的腐蚀行为。x射线光电子能谱（XPS）和电化学阻抗谱（EIS）证实，在dpns处理的表面上存在由氧化镁、氢氧化镁和碳酸镁组成的稳定保护层。14天后，dpns处理的样品显示出更高的正腐蚀电位（-0.69 V vs -1.36 V），电流密度（0.73 mA/cm²与0.75 mA/cm²相比）略低于对照。这种保护层与改良的表面拓扑结构相结合，启动了核心到外围的降解模式，在植入后8周内保持结构完整性。这些发现支持了这样的结论，即与未经处理的对照组相比，经过dpns处理的支架具有持续改善的耐腐蚀性。Micro-CT显示，经过等离子体处理的样品保留了更大的支撑（8周时为504.9±95.3µm），并形成了更大的H2袋，从植入物中心延伸14.2 mm，而对照组为4.9 mm。这种腐蚀行为开关提高了稳定性，但存在孔隙堵塞的风险，为生物医学应用的3D结构中定制镁合金降解和氢气演化提供了见解。

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引用次数: 0

Segregation behaviors in {101¯1} compressive twin boundaries of Mg-RE alloy under deformation at room temperature 变形条件下 Mg-RE 合金{101¯1}压缩孪晶边界的偏析行为

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2024.05.023

Yujie Cui , Lili Guo , Yunwei Gui , Kenta Aoyagi , Haotian Tong , Qinqin Wei , Fangzhou Liu , Yuichiro Hayasaka , Akihiko Chiba

Solute atoms and precipitates significantly influence the mechanical properties of Mg alloys. Previous studies have mainly focused on the segregation behaviors of Mg alloys after annealing. In this study, we investigated the segregation behaviors of an Mg-RE alloy under deformation. We found that the enrichment of solute atoms occurred in {10

\bar{1}

1} compressive twin boundaries under compression at 298 K without any annealing in an Mg-RE alloy by scanning transmission electron microscopy and energy-dispersive X-ray analysis. The segregated solutes and precipitates impeded the twin growth, partially contributing to the formation of small-sized {10

\bar{1}

1} compressive twins. This research indicates the twin boundaries can be strengthened by segregated solutes and precipitates formed under deformation at room temperature.

引用次数: 0

Development of a novel strategy for the quantification of ultra-trace impurity elements in high-purity magnesium using inductively coupled plasma tandem mass spectrometry 建立电感耦合等离子体串联质谱法定量分析高纯镁中超微量杂质元素的新方法

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2023.07.007

Liang Fu , Guangsheng Huang , Yaobo Hu , Xianhua Chen , Jingfeng Wang , Fusheng Pan

High purity magnesium is not only an important basic raw material for semiconductor and electronics industries, but also a promising new generation of electrochemical energy storage materials and biomedical materials. Impurities in high-purity magnesium affect material properties, which has become the most critical factor restricting its application. However, accurate analysis of multiple ultra-trace impurity elements in high-purity magnesium is extremely challenging. In this paper, based on the synergistic effect of N₂O/H₂ reaction gas mixture to eliminate spectral interference of inductively coupled plasma tandem mass spectrometry (ICP-MS/MS), a new strategy for the quantification of 45 ultra-trace impurity elements in high-purity magnesium was proposed. The results indicated that the limits of detection (LOD) were in the range of 0.02–18.5 ng L⁻¹; the LODs of the challenging non-metallic elements Si and S were 18.5 and 12.2 ng L⁻¹, respectively; and the LODs of all the other analytes were less than 10 ng L⁻¹. Even under hot plasma conditions, LODs of alkali metal elements were also less than 5 ng L⁻¹. The spike recovery of each analyte was 93.6%–107%, and the relative standard deviation (RSD) was 3.2%–6.9%, respectively. At a 95% level of confidence, no significant differences were found between the results obtained under the optimal conditions for the analyte with the developed method and the measurement results of SF-ICP-MS. The developed method indicated low LOD, high sample throughput, and complete interference elimination, demonstrating a new avenue for the rapid determination of ultra-trace elements in high-purity magnesium.

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引用次数: 0

Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO Structure 富SFs而非LPSO结构的Mg-Gd-Zn-Zr合金具有优异的疲劳性能

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2024.11.018

Yao Chen , Fulin Liu , Yujuan Wu , Liming Peng , Lang Li , Chao He , Qiang Chen , Yongjie Liu , Qingyuan Wang

Both solute-segregated long-period stacking ordered (LPSO) structure and stacking faults (SFs) are essential in strengthening rare-earth (RE) Mg alloys. Herein, LPSO-enriched Mg and SFs-enriched Mg are fabricated and comparably investigated for fatigue performances. During fatigue, the Mg nanolayers between LPSO lamellae or SFs act as the gliding channels of dislocations. However, SFs-enriched Mg exhibits outstanding fatigue strength due to solute strengthening within Mg nanolayers. Solute strengthening is assumed to contribute to the local accumulation of basal dislocations and the activation of non-basal dislocations. Dislocations are restricted locally and cannot glide long distances to specimen surfaces, which mitigates fatigue-induced extrusions and slip markings, ultimately leading to an increase in fatigue strength. These findings guide the development of RE-Mg alloys towards a synergy between high tensile and high fatigue performances.

溶质偏析长周期有序堆积（LPSO）结构和层错（SFs）是强化稀土镁合金的重要因素。本文制备了富lpso Mg和富sfs Mg，并对其疲劳性能进行了对比研究。疲劳过程中，镁纳米层在LPSO片层或SFs之间充当位错的滑动通道。然而，由于镁纳米层内溶质强化，富sfs的Mg表现出优异的疲劳强度。溶质强化被认为有助于基底位错的局部积累和非基底位错的激活。位错被限制在局部，不能长距离滑动到试样表面，这减轻了疲劳引起的挤压和滑移标记，最终导致疲劳强度的增加。这些发现指导RE-Mg合金朝着高拉伸和高疲劳性能协同发展。

引用次数: 0

In vitro and in vivo studies on bioactive hydroxyapatite-coated magnesium for glaucoma drainage implant 用于青光眼引流植入物的生物活性羟基磷灰石包裹镁的体外和体内研究

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2023.09.033

Huanhuan Gao , Yi Chen , Xia Chen , Liandi Huang , Hao Yao , Xiaomin Zhu , Min Tang , Yong Wang , Xiangji Li , Lin Xie

Given the alarmingly increasing rates of glaucoma worldwide and the lack of satisfactory treatments, there is a dire need to explore more feasible treatment options. Magnesium (Mg) is an essential element in maintaining the functional and structural integrity of vital ocular tissues, but Mg and its alloys are rarely mentioned in ophthalmic applications. Our previous research found that hydroxyapatite-coated Mg (Mg@HA) shows the best biocompatibility and bioactivity, and exhibits the effect of inhibiting fibrosis after filtration surgery in the rabbit model, which is expected to be a promising material for glaucoma drainage device. In this study, we further demonstrated the anti-fibrosis effect of Mg@HA from the molecular signal level and the efficacy of implantation in the rabbit filtration surgery model. In vitro experiments showed the surface modification of Mg affects the adhesion behavior and the reorganization of cytoskeleton of Human Western blot analysis and immunofluorescence found that Mg@HA regulates the adhesion and motility of human Tenon's capsule fibroblasts mainly by down-regulating the phosphorylation of Smad2 and Smad3 in the canonical transforming growth factor-beta (TGF - β) signaling pathway. By observing and recording the condition of filtering blebs and intraocular pressure after surgery, the effectiveness of Mg@HA applied in the rabbit filtration surgery model was further evaluated. In conclusion, the application of hydroxyapatite-coated Mg in the eye has good biocompatibility and has the potential to resist postoperative glaucoma filtration fibrosis, which may be mediated by the regulation of the TGFβ/Smad signaling pathway.

鉴于全球青光眼发病率的惊人增长以及缺乏令人满意的治疗方法，我们迫切需要探索更多可行的治疗方案。镁（Mg）是维持重要眼组织功能和结构完整性的重要元素，但镁及其合金在眼科应用中却很少被提及。我们之前的研究发现，羟基磷灰石包覆镁（Mg@HA）显示出最佳的生物相容性和生物活性，并具有抑制兔模型滤过手术后纤维化的效果，有望成为青光眼引流装置的理想材料。本研究从分子信号水平进一步证实了 Mg@HA 的抗纤维化作用以及在兔滤过手术模型中的植入效果。体外实验表明，Mg的表面修饰会影响人腱鞘囊成纤维细胞的粘附行为和细胞骨架的重组，通过Western印迹分析和免疫荧光发现，Mg@HA主要通过下调典型转化生长因子-β（TGF - β）信号通路中Smad2和Smad3的磷酸化来调节人腱鞘囊成纤维细胞的粘附和运动。通过观察和记录术后滤过性出血点的情况和眼压，进一步评估了 Mg@HA 在兔滤过性手术模型中的应用效果。总之，在眼内应用羟基磷灰石包覆的镁具有良好的生物相容性，并具有抗青光眼术后滤过纤维化的潜力，这可能是通过调节TGFβ/Smad信号通路介导的。

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引用次数: 0

Fish scale-inspired biomimetic nanocoatings on magnesium implants for vascularized bone regeneration in infected bone defects

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2024.07.012

Dan Li , Danni Dai , Jianrong Wang, Zhen Ai, Chao Zhang

The regeneration of infected bone defects is still challenging and time-consuming, due to the adverse osteogenic microenvironment caused by bacterial contamination and pronounced ischemia. Biodegradable magnesium (Mg)-based alloys are desirable for orthopedic implants due to the mechanical properties approximating those of human bone and the released Mg²⁺ ions essential to osteogenic activity. However, the fast and uncontrolled self-degradation of Mg alloy, along with the inadequate antimicrobial activity, limit their strength in the osteogenic microenvironment. Inspired by the structural and physiological characteristics of “fish scales,” two-dimensional (2D) nanomaterials, black phosphorus (BP) and graphene oxide (GO), were assembled together under the action of pulsed electric field. The bionic 2D layered BP/GO nano-coating was constructed for infection resistance, osteogenic microenvironment optimization, and biodegradation control. In the early stage of implantation, it exerted a photothermal effect to ablate bacterial biofilms and avoid contaminating the microenvironment. The blocking effect of the “nano fish scales” - 2D material superposition regulated the degradation of implants. In the later stage, it attracted the migration of vascular endothelial cells (VECs) and released phosphate slowly for in situ mineralization to create the microenvironment favoring vascularized bone formation. It is indicated that the enhancement of microtubule deacetylation and cytoskeletal reorganization played a key role in the effect of VEC migration and angiogenesis. This study provided a promising bionic strategy for creating osteogenic microenvironments that match the sequential healing process of infected bone defects.

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引用次数: 0

Strain rate dependence of dynamic recrystallization and texture evolution in hot compressed Mg-Gd-Er-Zr alloy 热压缩Mg-Gd-Er-Zr合金动态再结晶与织构演化的应变速率依赖性

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2023.10.006

Ning Ding, Wenbo Du, Shubo Li, Ke Liu, Xian Du, Zijian Yu

Hot deformation with high strain rate has been paid more attention due to its high efficiency and low cost, however, the strain rate dependent dynamic recrystallization (DRX) and texture evolution in hot deformation process, which affect the formability of metals, are lack of study. In this work, the DRX behavior and texture evolution of Mg-8Gd-1Er-0.5Zr alloy hot compressed with strain rates of 0.1 s⁻¹, 1 s⁻¹, 10 s⁻¹ and 50 s⁻¹ are studied, and the corresponding dominant mechanisms for DRX and texture weakening are discussed. Results indicated the DRX fraction was 20% and the whole texture intensity was 16.89 MRD when the strain rate was 0.1 s⁻¹, but they were 76% and 6.55 MRD, respectively, when the strain rate increased to 50 s⁻¹. The increment of DRX fraction is suggested to result from the reduced DRX critical strain and the increased dislocation density as well as velocity, while the weakened whole texture is attributed to the increased DRX grains. At the low strain rate of 0.1 s⁻¹, discontinuous DRX (DDRX) was the dominant, but the whole texture was controlled by the deformed grains with the preferred orientation of {0001}⊥CD, because the number of DDRX grains was limited. At the high strain rate of 50 s⁻¹, continuous DRX (CDRX) and twin-induced DRX (TDRX) were promoted, and more DRX grains resulted in orientation randomization. The whole texture was mainly weakened by CDRX and TDRX grains, in which CDRX plays a major role. The results of present work are significant for understanding the hot workability of Mg-RE alloys with a high strain rate.

高应变速率热变形因其高效率和低成本而受到越来越多的关注，但热变形过程中随应变速率变化的动态再结晶(DRX)和织构演变对金属成形性的影响却缺乏研究。本文研究了Mg-8Gd-1Er-0.5Zr合金在0.1 s−1、1 s−1、10 s−1和50 s−1应变速率下的DRX行为和织构演变，并探讨了DRX和织构弱化的主要机制。结果表明，当应变速率为0.1 s−1时，DRX分数为20%，整体织构强度为16.89 MRD，而当应变速率增加到50 s−1时，DRX分数和织构强度分别为76%和6.55 MRD。DRX分数的增加是由于DRX临界应变的降低和位错密度和速度的增加，而整体织构的减弱是由于DRX晶粒的增加。在0.1 s−1的低应变速率下，不连续的DRX (DDRX)占主导地位，但由于DDRX晶粒的数量有限，整个织构由具有{0001}⊥取向的变形晶粒控制。在50 s−1的高应变速率下，促进了连续DRX (CDRX)和双诱导DRX (TDRX)， DRX晶粒增多导致取向随机化。整个织构主要被CDRX和TDRX晶粒削弱，其中CDRX起主要作用。本文的研究结果对了解高应变率Mg-RE合金的热加工性具有重要意义。

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引用次数: 0

Self-assembled biodegradable herbal-based nanoflower decorative magnesium implants combine therapy with bone regeneration 自组装的可生物降解草本纳米花装饰镁植入体将治疗与骨再生相结合

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2023.11.012

Huihui Du , Dongdong Zhang , Kui Xue , Limin Ma , Ru Xu , Ji Tan , Feng Peng , Xuanyong Liu

The rapid corrosion rate and limited biological functionality still pose challenges for magnesium (Mg)-based implants in the treatment of complicated bone-related diseases in clinic. Herein, a multifunctional biodegradable curcumin (herbal medicine)-ferrum (Cur-Fe) nanoflower was self-assembled on plasma electrolytic oxidation (PEO)-treated Mg alloy via a facile immersion process to realize differential biological function for anti-bacteria/tumor and bone regeneration. The results indicated that Cur-Fe nanoflower coating can promote protein adsorption, cell adhesion and proliferation, exhibiting excellent biocompatibility. The Cur-Fe nanoflower coating exhibits unique degradation characteristics, as curcumin gradually decomposes into ferulic acid, aromatic aldehyde and other antibacterial substances, and the coating spontaneously converts into FeOOH nanosheets, ensuring the corrosion resistance of Mg-based implants. Moreover, Cur-Fe coating exhibits remarkable narrow gap semiconductor characteristics, which can generate reactive oxygen species (ROS) and demonstrated excellent antibacterial effect under simulated sunlight (SSL) irradiation. Meanwhile, under NIR irradiation, Cur-Fe coating showed excellent chemotherapy/photodynamic/photothermal synergetic antitumor properties in vitro and in vivo due to the introduction of curcumin, and photocatalysis and photothermal conversion properties of coating. Furthermore, Cur-Fe nanoflower coating demonstrated great osteogenesis activity in vitro and in vivo due to unique micro/nano structure, surface chemical bond, and the release of Mg and Fe ions.

在临床上，以镁（Mg）为基础的植入物在治疗复杂的骨相关疾病时，仍面临着腐蚀速度快和生物功能有限的挑战。本文通过简便的浸泡工艺，在等离子体电解氧化（PEO）处理过的镁合金上自组装了一种多功能生物可降解姜黄素（中药）-铁（Cur-Fe）纳米花，以实现抗菌/抗肿瘤和骨再生的不同生物功能。结果表明，Cur-Fe 纳米花涂层能促进蛋白质吸附、细胞粘附和增殖，具有良好的生物相容性。Cur-Fe纳米花涂层具有独特的降解特性，姜黄素会逐渐分解为阿魏酸、芳香醛等抗菌物质，涂层会自发转化为FeOOH纳米片，确保镁基植入物的耐腐蚀性。此外，Cur-Fe 涂层还具有显著的窄隙半导体特性，能产生活性氧（ROS），在模拟阳光（SSL）照射下具有优异的抗菌效果。同时，由于姜黄素的引入以及涂层的光催化和光热转换特性，在近红外照射下，Cur-Fe 涂层在体外和体内表现出优异的化疗/光动力/光热协同抗肿瘤特性。此外，由于独特的微/纳米结构、表面化学键以及镁离子和铁离子的释放，莪术-铁纳米花涂层在体外和体内都表现出很强的成骨活性。

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引用次数: 0

Magnesium is at a crossroads: An industrial metal or a technology metal? 镁正处于十字路口：是工业金属还是科技金属？

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2024.12.017

Alan A. Luo

引用次数: 0

An overview of RE-Mg-based alloys for hydrogen storage: Structure, properties, progresses and perspectives

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys

Pub Date : 2025-01-01 DOI: 10.1016/j.jma.2024.12.020

Dongsheng Zhou , Chunling Zheng , Yanghuan Zhang , Hanfeng Sun , Peng Sheng , Xin Zhang , Jun Li , Shihai Guo , Dongliang Zhao

Rare earth (RE) elements have been successfully utilized in solid-state hydrogen storage as hydrogen-absorbing elements with excellent hydrogen storage properties in terms of safety and efficiency. RE-Mg-based hydrogen storage materials with high magnesium content are considered to be one of the most promising hydrogen storage materials for application due to their high mass/volume hydrogen storage density, moderate required hydrogen pressure, good reversibility, non-toxicity, and harmlessness. Furthermore, RE-Mg-based materials with low magnesium content and superlattice structure show great potential for application in the field of solid-state hydrogen storage. They are also widely used as anode materials for nickel-metal hydride batteries. In this paper, we comprehensively summarized and evaluated the organization and hydrogen storage properties of different RE-Mg system alloys (Mg-RE, Mg-RE-TM (TM=transition metals), and superlattice-type RE-Mg-TM) and the catalytic effect and mechanisms of catalysts on RE-Mg system alloys. The interactions between the types of RE elements, the contents of RE elements, the crystal structures, and the catalysts with the microstructure morphology and hydrogen storage properties of RE-Mg-based hydrogen storage alloys were established. The intrinsic mechanisms between microstructure morphology, phase structure, phase composition, and hydrogen storage properties of alloys with different RE-Mg-based systems were elucidated. By comparing the differences and characteristics between the organizational structures and hydrogen storage properties of different RE-Mg systems, a feasible idea and solution for the rational design and development of RE-Mg-based alloys with high hydrogen storage capacity, low cost, and fast hydrogen absorption and desorption kinetics was proposed.

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引用次数: 0