Progress in Natural Science: Materials International最新文献_第10页

Trace Mg2+ doping enhances structural stability of single-crystal layered oxides for sodium-ion batteries 微量Mg2+掺杂提高了钠离子电池单晶层状氧化物的结构稳定性

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-06-01 DOI: 10.1016/j.pnsc.2025.03.002

Xianzhe Han, Xiaomei Li, Ruiyun Chai, Shun Wang, Yifei Yuan, Yanshuai Li

Sodium-ion batteries (SIBs) have emerged as a promising alternative to lithium-ion batteries due to the abundance and low cost of sodium resources. However, the structural instability of P2-type layered oxides during cycling remains a significant challenge, limiting their practical application. Single-crystal materials, with their highly ordered atomic structure and superior electronic and mechanical properties, are pivotal for the development of high-performance SIBs. In this study, we optimize the electrochemical performance of P2-type single-crystal layered oxides by trace doping with Mg²⁺, carefully preserving the inherent single-crystal structure. Mg²⁺ doping not only stabilizes the P2 phase and mitigates detrimental phase transitions, but also enhances Na⁺ diffusion kinetics by subtly expanding the interplanar spacing without disrupting the single-crystal integrity. We demonstrate that trace Mg²⁺ doping improves the structural and electrochemical properties, resulting in superior cycling stability and rate capability. NMCMg_0.05 maintains 83.7 % of its initial capacity after 1000 cycles at 5 C, while full-cell tests with a hard carbon anode show 75.0 % capacity retention after 300 cycles and an energy density of 124.1 Wh·kg⁻¹. This work underscores the critical role of single-crystal engineering and trace doping in enhancing the stability and performance of SIB cathodes, offering a pathway for next-generation, high-performance sodium-ion batteries.

由于钠资源丰富且成本低，钠离子电池已成为锂离子电池的一个有前途的替代品。然而，p2型层状氧化物在循环过程中的结构不稳定性仍然是一个重大挑战，限制了它们的实际应用。单晶材料具有高度有序的原子结构和优越的电子和机械性能，是高性能sib发展的关键。在本研究中，我们通过微量掺杂Mg2+来优化p2型单晶层状氧化物的电化学性能，同时保持其固有的单晶结构。Mg2+的掺杂不仅稳定了P2相，减轻了有害的相变，而且在不破坏单晶完整性的情况下，通过微妙地扩大面间距，增强了Na+的扩散动力学。我们证明了微量Mg2+掺杂改善了结构和电化学性能，从而获得了优异的循环稳定性和速率能力。在5℃下循环1000次后，NMCMg0.05保持了83.7%的初始容量，而使用硬碳阳极的全电池测试显示，在300次循环后，容量保持率为75.0%，能量密度为124.1 Wh·kg−1。这项工作强调了单晶工程和微量掺杂在提高SIB阴极稳定性和性能方面的关键作用，为下一代高性能钠离子电池提供了途径。

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引用次数: 0

Mechanical property enhancement of basalt fiber-reinforced epoxy composites via construction of an organic/inorganic hybrid interface 通过构建有机/无机杂化界面增强玄武岩纤维增强环氧复合材料的力学性能

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2025.01.002

Dong Xiang , Chao Chen , Guoqian Xie , Yusheng Gong , Jingxiong Ma , Eileen Harkin-Jones , Menghan Wang , Libing Liu , Yuanpeng Wu , Chunxia Zhao , Hui Li

Basalt fiber (BF) reinforced polymer composites (BFRPs) have promising applications in aerospace, chemical, automotive, and other advanced technologies. However, their mechanical properties are currently limited due to poor interfacial bonding between the smooth, inert, and low-energy surfaces of BF and the polymer matrix. To address this issue, in the present study, polydopamine (PDA) and polyethyleneimine (PEI) are grown in-situ on the BF surface and followed by grafting of carboxylic-functionalized, multi-walled carbon nanotubes (C-CNTs) on the PDA/PEI layer to construct an organic/inorganic hybrid interface between the fiber and polymer matrix (epoxy resin). Mechanical characterization of the resulting BF-PDA/PEI-C-CNTs/epoxy composites exhibit a 64.7 %, 34.4 %, 27.5 %, and 28.9 % increase in the interfacial shear strength (IFSS), interlaminar shear strength, flexural strength, and tensile strength of the modified BFRPs respectively. In addition, surface analysis of the modified BF shows an increase in surface roughness (Ra) from 9.80 nm to 43.46 nm. Finite element analysis (FEA) indicates that the maximum internal stress in the composite decreases with increasing thickness of the interfacial transition zone after BF modification, reaching a maximum reduction of 59.8 %. Overall, this construction of a hybrid interface between the two phases of the composite provides a simple, effective, and promising strategy to improve the mechanical performance of BFRPs.

玄武岩纤维（BF）增强聚合物复合材料（BFRPs）在航空航天、化工、汽车等先进技术领域有着广阔的应用前景。然而，由于BF的光滑、惰性和低能表面与聚合物基体之间的界面结合不良，它们的机械性能目前受到限制。为了解决这一问题，本研究在BF表面原位生长聚多巴胺（PDA）和聚乙烯亚胺（PEI），然后在PDA/PEI层上接枝羧基功能化的多壁碳纳米管（C-CNTs），构建纤维与聚合物基体（环氧树脂）之间的有机/无机杂化界面。结果表明，改性后的BF-PDA/PEI-C-CNTs/环氧复合材料的界面剪切强度（IFSS）、层间剪切强度、抗弯强度和抗拉强度分别提高了64.7%、34.4%、27.5%和28.9%。此外，表面分析表明，改性BF的表面粗糙度（Ra）从9.80 nm增加到43.46 nm。有限元分析（FEA）表明，BF改性后，复合材料的最大内应力随界面过渡区厚度的增加而减小，最大减小幅度为59.8%。总的来说，在复合材料的两相之间构建混合界面为提高bfrp的力学性能提供了一种简单、有效和有前途的策略。

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引用次数: 0

Simultaneous measurement of thermal conductivity, heat capacity, and interfacial thermal conductance by leveraging negative delay-time data in time-domain thermoreflectance 通过利用时域热反射中的负延迟时间数据同时测量热导率，热容和界面热导率

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2025.02.001

Mingzhen Zhang , Tao Chen , Ao Zeng , Jialin Tang , Ruiqiang Guo , Puqing Jiang

Time-domain thermoreflectance (TDTR) is a widely used technique for characterizing the thermal properties of bulk and thin-film materials. Traditional TDTR analyses typically focus on positive delay time data for fitting, often requiring multiple-frequency measurements to simultaneously determine thermal conductivity and heat capacity. However, this multiple-frequency approach is cumbersome and may introduce potential errors due to practical challenges to ensure consistent measurements across different frequencies. In this study, we propose a novel solution to these challenges by harnessing the underexplored negative delay time data in TDTR. By integrating these data points, we offer a streamlined, single-frequency method that simultaneously measures thermal conductivity, heat capacity, and interfacial thermal conductance for both bulk and thin-film materials, enhancing measurement efficiency and accuracy. We demonstrate the effectiveness of this method by measuring several bulk samples including sapphire, silicon, diamond, and Si_0.992Ge_0.008, and several thin-film samples including a 1.76-μm-thick gallium nitride (GaN) film epitaxially grown on a silicon substrate, a 320-nm-thick gallium oxide (ε-Ga₂O₃) film epitaxially grown on a silicon carbide substrate, and a 330-nm-thick tantalum nitride (TaN) film deposited on a sapphire substrate, all coated with an aluminum (Al) transducer layer on the surface. Our results show that the new method accurately determines the thermal conductivity and heat capacity of these samples as well as the Al/sample interfacial thermal conductance using a single modulation frequency, except for the Si_0.992Ge_0.008 sample. This study sheds light on the untapped potential of TDTR, offering a new, efficient, and accurate avenue for thermal analysis in material science.

时域热反射（TDTR）是一种广泛应用于表征块状和薄膜材料热性能的技术。传统的TDTR分析通常侧重于拟合正延迟时间数据，通常需要多频率测量来同时确定热导率和热容。然而，这种多频率方法很麻烦，并且可能由于确保不同频率的一致测量的实际挑战而引入潜在的误差。在本研究中，我们提出了一种新的解决方案，通过利用TDTR中未充分开发的负延迟时间数据来应对这些挑战。通过整合这些数据点，我们提供了一种简化的单频方法，可以同时测量大块和薄膜材料的热导率、热容和界面热导率，从而提高了测量效率和准确性。我们通过测量蓝宝石、硅、金刚石和Si0.992Ge0.008等大块样品，以及在硅衬底上外延生长的1.76 μm厚的氮化镓（GaN）薄膜、在碳化硅衬底上外延生长的320 nm厚的氧化镓（ε-Ga2O3）薄膜和在蓝宝石衬底上沉积的330 nm厚的氮化钽（TaN）薄膜，证明了该方法的有效性。所有表面都涂有一层铝（Al）换能器层。结果表明，除了Si0.992Ge0.008样品外，新方法使用单一调制频率准确地测定了这些样品的热导率和热容以及Al/样品界面热导率。这项研究揭示了TDTR尚未开发的潜力，为材料科学的热分析提供了一种新的、高效的、准确的途径。

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引用次数: 0

Ethylbenzene adsorption on pristine, doped and vacancy-defective Ti2C nanosheets: A DFT study 原始、掺杂和空位缺陷Ti2C纳米片对乙苯的吸附：DFT研究

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2025.02.002

Zhao Qian , Enlin Qi , Dan Zhao , Zelong Gong , Muhammad Sajjad , Weidong Qin , Rajeev Ahuja

The optimized atomic structures, energetics and electronic structures of ethylbenzene adsorption systems on pristine, doped and vacancy-defective Ti₂C nanosheets respectively have been investigated using first-principles method based on density functional theory to explore their potential ethylbenzene adsorption and detection capabilities. It is found that various vacancy defects improve the ethylbenzene adsorption energies of Ti₂C nanosheet. While, the adsorption behavior of ethylbenzene molecule on doped Ti₂C nanosheet varies with the difference of doping atoms. Among them, the Si-doped and Mn-doped Ti₂C respectively show good adsorption potential. Charge transfer mechanisms between ethylbenzene and various Ti₂C nanosheets have been studied through the Bader charge and differential charge density analysis to explore the deep origin of the underlying electronic structure changes. This theoretical work is proposed to predict the adsorption and sensing potential of various Ti₂C nanosheets towards ethylbenzene (a kind of gas marker for lung cancer) and would help to guide experimentalists to develop better Ti₂C-based 2-D materials for gas detection applications in the future.

采用基于密度泛函理论的第一性原理方法，分别研究了原始、掺杂和空缺缺陷Ti2C纳米片上乙苯吸附体系的优化原子结构、能量学和电子结构，探讨了它们对乙苯的潜在吸附和检测能力。发现各种空位缺陷提高了Ti2C纳米片对乙苯的吸附能。而乙苯分子在掺杂Ti2C纳米片上的吸附行为随掺杂原子的不同而不同。其中，si掺杂和mn掺杂的Ti2C分别表现出良好的吸附势。通过Bader电荷和差分电荷密度分析，研究了乙苯与各种Ti2C纳米片之间的电荷转移机制，探讨了潜在电子结构变化的深层原因。这项理论工作旨在预测各种Ti2C纳米片对乙苯（一种肺癌气体标志物）的吸附和传感潜力，并有助于指导实验人员在未来开发更好的Ti2C基二维气体检测材料。

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引用次数: 0

Highly efficient reduction of 4-nitrophenol by the Au/MoS2 catalyst with the promotion of cobalt introduction Au/MoS2催化剂在引入钴的促进下高效还原4-硝基苯酚

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2025.02.003

Jie Li , Zhangyue Zheng , Yuehong Huang , Liu He , Hongying Guo , Chunzheng Wu , Wei Liu , Weiwei Huan

The serious problems caused by water contamination call for efficient treatment. The catalytic reduction of 4-nitrophenol (4-NP) by NaBH₄ in solution is a convenient way to convert 4-NP to 4-aminophenol (4-AP), which is a precious intermediate for manufacturing of important materials such as pharmaceuticals. In the present study, the Co modified MoS₂ supported Au nanoparticles (Au/Co-MoS₂) is proved to be an efficient catalyst for the reduction of 4-NP. With the introduction of cobalt, the catalytic activity is improved obviously compared to Au/MoS₂. When Co:Mo is 2:8 (mol), the Au/CoMoS₂(2/8) catalyst exhibits the highest activity. The kinetics of the catalytic reactions were studied by the plot of ln(C_t/C₀) against reaction time and the k_app for Au/CoMoS₂(2/8) is 1.063 min⁻¹. The characterization of the catalysts shows that the addition of cobalt can create more crystal defects, promote the exposure of active edge sites, facilitate the surface of catalysts to be more reactive.

水污染造成的严重问题需要有效的处理。NaBH4在溶液中催化还原4-硝基苯酚（4-NP）是将4-NP转化为4-氨基苯酚（4-AP）的一种简便方法，4-氨基苯酚是制造药物等重要材料的宝贵中间体。在本研究中，Co修饰的MoS2负载的Au纳米颗粒（Au/Co-MoS2）被证明是一种有效的还原4-NP的催化剂。与Au/MoS2相比，钴的引入明显提高了催化剂的催化活性。当Co:Mo为2:8 （mol）时，Au/CoMoS2（2/8）催化剂的活性最高。用ln（Ct/C0）与反应时间的关系图研究了催化反应的动力学，Au/CoMoS2（2/8）的kapp为1.063 min−1。催化剂的表征表明，钴的加入可以产生更多的晶体缺陷，促进活性边缘位点的暴露，有利于催化剂表面的活性增强。

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引用次数: 0

Multi-objective optimization for shape memory alloys with large recoverable strain and low hysteresis 大可恢复应变低迟滞形状记忆合金的多目标优化

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2025.02.004

Deqing Xue , Bueryi Shen , Guojun Zhang , Ruihao Yuan

Design

of shape memory alloys with large phase transformation strain and low hysteresis is in demand for practical applications that require high output work and high precision. However, this remains challenging due to the competition between these two properties. In this work, we report a method that combines machine learning with multi-objective optimization to assist the rapid design of shape memory alloys. Instead of directly using the predictions from machine learning to guide experiments, this work employs the uncertainty-aware two-objective optimization algorithm to recommend the potential candidates. Such a strategy is beneficial to the case where limited data is available just as the dataset of twenty NiTi-based alloys with hysteresis and phase transformation strain established herein. Key features are screened out from a relatively large feature pool and Gaussian regression models are built for predicting the two properties of unknown alloys. At the end, eight alloys with promise to improve both recoverable strain and hysteresis are recommended, as compared to the alloys in the initial dataset.

设计具有大相变应变和低迟滞的形状记忆合金是实际应用中对高输出功和高精度的要求。然而，由于这两个属性之间的竞争，这仍然具有挑战性。在这项工作中，我们报告了一种将机器学习与多目标优化相结合的方法来辅助形状记忆合金的快速设计。这项工作不是直接使用机器学习的预测来指导实验，而是使用不确定性感知的双目标优化算法来推荐潜在的候选对象。这种策略对于数据有限的情况是有利的，就像本文建立的20种镍钛基合金的迟滞和相变应变数据集一样。从相对较大的特征池中筛选出关键特征，并建立高斯回归模型来预测未知合金的两种性能。最后，与初始数据集中的合金相比，推荐了8种有望改善可恢复应变和迟滞的合金。

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引用次数: 0

Decoupling opposed thermoelectric parameters via multilayer structure in Bi2Te3-based films 利用多层结构对bi2te3基薄膜的热电参数进行解耦

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2025.01.003

Yan Zhou , Yingqi Chen , Haohao Wang , Guoxiang Wang

Highly conductive metal layers Cr and Al are introduced to prepare multilayer thermoelectric films of Bi₂Te₃/Al and Bi₂Te₃/Cr. XRD precipitations and Raman bonding reveal the interfacial stability between the Bi₂Te₃ and Al layers. The multilayer structure's interfacial effect breaks the coupling between the electrical conductivity and the Seebeck coefficient, both of which exhibit a steady upward trend as temperature rises. This directly contributes to the high power factor of 520.8 μW/mK² for Bi₂Te₃/Al that is produced at 600 K. On the other hand, Bi₂Te₃ tends to react with Cr as temperature rises, and at 600 K, the optimal carrier concentration following interdiffusion results in a maximum PF of 199.0 μW/mK². By comparison, they are both almost six times and two times better than pure Bi₂Te₃, respectively. Overall, this work improves Bi₂Te₃ by introducing the metals Al and Cr with constructing a multilayer structure. It also offers a straightforward and user-friendly method for utilizing interfacial engineering to optimize the thermoelectric properties of thin films.

采用高导电性金属层Cr和Al制备了Bi2Te3/Al和Bi2Te3/Cr多层热电薄膜。XRD沉淀和拉曼键合揭示了Bi2Te3和Al层之间的界面稳定性。多层结构的界面效应打破了电导率和塞贝克系数之间的耦合关系，两者都随着温度的升高而呈现稳定的上升趋势。这直接有助于在600 K时产生的Bi2Te3/Al的高功率因数为520.8 μW/mK2。另一方面，随着温度的升高，Bi2Te3倾向于与Cr发生反应，在600 K时，经互扩散后的最佳载流子浓度可获得最大PF为199.0 μW/mK2。相比之下，它们分别比纯Bi2Te3好近6倍和2倍。总的来说，本工作通过构建多层结构，引入金属Al和Cr来改进Bi2Te3。它还为利用界面工程优化薄膜热电性能提供了一种简单易用的方法。

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引用次数: 0

Nickel-based cathode in the rechargeable aqueous zinc ion batteries 可充电水性锌离子电池中的镍基阴极

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2024.11.003

Lin Chen, Tiancheng Tu, Longyan Li

In order to reduce reliance on fossil energy sources, there has been a focus on developing and utilizing the new renewable energy sources, leading to the gradual development of electrochemical energy storage systems. Among these systems, the rechargeable aqueous zinc ion battery has emerged as one of the most promising for commercialization in the next generation, receiving extensive research attention since its inception. A specific type within this category is the aqueous nickel-zinc battery, which utilizes a nickel-based electrode as the cathode and zinc as the anode, offering researchers a high capacity option. However, as research progresses, limitations of using solely nickel-based materials have become apparent, such as poor stability. To address these issue, various modification studies have been conducted, yielding some promising results. To provide a comprehensive overview of the design of cathode materials for aqueous zinc ion batteries, this review summarizes recent research and outlines the preparation method, modification techniques, and enhancement mechanisms of nickel-based materials.

为了减少对化石能源的依赖，开发和利用新的可再生能源成为人们关注的焦点，电化学储能系统也逐渐发展起来。在这些系统中，可充电水性锌离子电池已经成为下一代最有商业化前景的系统之一，自问世以来就受到了广泛的研究关注。这一类中的一种特殊类型是含水镍锌电池，它利用镍基电极作为阴极，锌作为阳极，为研究人员提供了高容量的选择。然而，随着研究的深入，单纯使用镍基材料的局限性也越来越明显，比如稳定性差。为了解决这些问题，进行了各种改性研究，取得了一些有希望的结果。本文对锌离子电池正极材料的设计进行了综述，综述了镍基材料的制备方法、改性技术和增强机理。

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引用次数: 0

A dual hydrogen bond crosslinking strategy for black phosphorus-based anodes in high rate capability lithium-ion batteries 高倍率容量锂离子电池黑磷基阳极的双氢键交联策略

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2025.02.010

Lingke Li, Fangli Xiao, Wenqiang Ai, Shilong Dong, Ruiqi Wang, Yanan Zheng, Hongyu Ji, Yang Liu, Lei Zu, Huiqin Lian

Black phosphorus (BP) has advantages over silicon and graphite in high-capacity fast charging. However, BP faces challenges such as low conductivity and volume expansion. Although composites of BP and graphite (G) can alleviate these problems to a certain extent, it is difficult to maintain the high performance of batteries at high current densities with conventional single binder systems. In this study, an innovative dual hydrogen bonding cross-linking strategy is proposed. The study used a cost-effective ball milling method to prepare BP-G composites and a hydrogen-bonded crosslinked polyacrylic acid (PAA)-poly(ethylene oxide) (PEO) binder to form hydrogen bonds with the BP. Hydrogen bonding cross-linking allows the binder to form a network structure, which effectively disperses the stresses. Hydrogen bonding exists between the binder and the BP. Ether bonds in the binder improve ionic migration. The degree of hydrogen bond crosslinking was optimized by adjusting the binder composition. The electrode material with the optimal binder ratio exhibited a discharge capacity of 1186 mAh g⁻¹ at 8 A g⁻¹. After 900 cycles, a reversible capacity of 771.8 mAh g⁻¹ was maintained, with a capacity retention rate of 65.1 %, significantly outperforming electrodes using polyvinylidene fluoride (27.9 %) and PAA (19.3 %).

在高容量快速充电方面，黑磷（BP）比硅和石墨具有优势。然而，BP面临着低导电性和体积膨胀等挑战。虽然BP和石墨(G)的复合材料可以在一定程度上缓解这些问题，但传统的单一粘结剂体系很难在大电流密度下保持电池的高性能。在这项研究中，提出了一种创新的双氢键交联策略。该研究采用经济高效的球磨法制备BP- g复合材料，并用氢键交联聚丙烯酸(PAA)-聚环氧乙烷（PEO）粘结剂与BP形成氢键。氢键交联可使粘结剂形成网状结构，有效分散应力。粘结剂与BP之间存在氢键。粘合剂中的醚键促进离子迁移。通过调整粘结剂的组成，优化了氢键交联度。最佳粘结剂配比的电极材料在8 a g−1时的放电容量为1186 mAh g−1。经过900次循环后，电极的可逆容量保持在771.8 mAh g−1，容量保持率为65.1%，明显优于聚偏氟乙烯（27.9%）和PAA（19.3%）电极。

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引用次数: 0

In vitro and in vivo evaluation of high-strength Mg-Zn-Zr-Mn alloy: Promising biocompatibility and degradation for medical translations 高强度Mg-Zn-Zr-Mn合金的体外和体内评价：有前景的生物相容性和医学翻译降解

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-04-01 DOI: 10.1016/j.pnsc.2024.12.017

Teng Zhang , Shu Wang , Jin He , Shilong Wang , Bin Yan , Maoqi Gong , Wei Han , Xieyuan Jiang , Chen Shi , Jun Xiang

Magnesium alloys have gained popularity in orthopedic implants due to their excellent biocompatibility and biodegradability, which eliminates the need for secondary surgeries for removal. However, uncontrolled rapid degradation of most magnesium alloys can lead to early failure of implants with unexpected accumulation of gas, disturbing regeneration of surrounding tissues. In this article, we introduce new Mg-Zn-Zr-Mn magnesium alloys with biocompatible elements in low concentrations, which can form single-phase alloy and diminish corrosion due to galvanic corrosion due to multiple phases. These alloys also demonstrated outstanding mechanical properties with tensile strength of 332 MPa and excellent biocompatibility. Degradation tests were conducted in vitro by electrochemical tests and measuring mass loss and hydrogen gas released, and nearly constant degradation behavior was observed. In vivo degradation experiments were done using goats as models, and long-term observation demonstrated excellent biocompatibility and controlled degradation pattern of our new Mg alloys. Our results provided insights into the in vitro and in vivo performance of our new Mg alloys, and they can be highly promising for widespread use in orthopedic implants.

镁合金由于其优异的生物相容性和可生物降解性，在骨科植入物中得到了广泛的应用，这消除了二次手术去除的需要。然而，大多数镁合金不受控制的快速降解会导致植入物的早期失效，并伴有意想不到的气体积聚，干扰周围组织的再生。本文介绍了一种新型Mg-Zn-Zr-Mn镁合金，该镁合金含有低浓度的生物相容性元素，既能形成单相合金，又能减少多相电偶腐蚀造成的腐蚀。这些合金还表现出优异的力学性能，抗拉强度达332 MPa，具有良好的生物相容性。通过电化学测试、质量损失和氢气释放等方法对其进行了体外降解试验，观察到其降解行为几乎恒定。以山羊为模型进行了体内降解实验，长期观察表明新镁合金具有良好的生物相容性和可控的降解模式。我们的研究结果为我们的新镁合金的体外和体内性能提供了见解，它们在骨科植入物的广泛应用中具有很大的前景。

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引用次数: 0