Journal of Non-crystalline Solids最新文献_第5页

Increasing Tc retention during nuclear waste vitrification: Structural and phase change analysis of Al-source behavior by 27Al MAS NMR 在核废料玻璃化过程中增加Tc保留：用27Al MAS NMR分析al源行为的结构和相变化

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-29 DOI: 10.1016/j.jnoncrysol.2025.123926

Laura Löwy , Martina Urbanová , Matouš Eret , Jaroslav Kloužek , Petra Cincibusová , Miroslava Vernerová , Pavel Hrma , Albert A. Kruger , Ivana Sedenkova , Jiri Brus , Richard Pokorný

Efficient immobilization of volatile technetium (Tc) remains a key challenge during vitrification of low-activity nuclear waste (LAW). This study explores how different aluminum sources—kyanite, gibbsite, and boehmite—affect structural transformations in heated LAW melter feeds and influence the retention of rhenium (Re), a non-radioactive chemical surrogate for Tc. To investigate the decomposition of Al precursors and to track the formation of transient aluminum phases upon heating, we applied temperature-resolved ²⁷Al MAS NMR spectroscopy combined with principal component-based factor analysis (FA), complemented by X-ray diffraction. This FA approach, previously unexplored in nuclear waste vitrification studies, enabled precise identification and tracking of transient nanocrystalline alumina intermediates and their coordination environments formed between 400 and 900 °C. Boehmite-containing feed produced the highest proportion of ordered nanocrystalline alumina phases, followed by gibbsite, while kyanite remained undissolved to high temperature. The higher abundance of reactive Al-sites in the boehmite- and gibbsite-containing feeds correlates with improved Re retention in the glass, likely through enhanced adsorption of Re-bearing salts and/or their incorporation into transient sodalite-like aluminosilicates. Our findings not only highlight the crucial impact of Al-source selection to control intermediate phase formation and to facilitate early-stage incorporation and immobilization of volatile radionuclides, but also establish factor analysis of NMR spectra as a powerful methodology for understanding of structural and chemical transformations during vitrification.

在低活度核废料（LAW）的玻璃化过程中，挥发性锝（Tc）的有效固定化仍然是一个关键挑战。本研究探讨了不同的铝源——蓝晶石、三水铝石和薄铝石——如何影响加热法熔体进料中的结构转变，并影响铼（Re）的保留，铼是Tc的非放射性化学替代品。为了研究Al前驱体的分解并跟踪加热后瞬态铝相的形成，我们应用了温度分辨27Al MAS NMR结合主成分因子分析（FA），并辅以x射线衍射。这种FA方法以前未在核废料玻璃化研究中探索过，能够精确识别和跟踪瞬态纳米晶氧化铝中间体及其在400至900°C之间形成的配位环境。含勃水铝石的饲料产生的有序纳米晶氧化铝相比例最高，其次是三水铝石，而蓝晶石在高温下仍不溶解。在含薄水铝石和三水铝石的原料中，活性铝位点的丰度较高，这与玻璃中稀土的保留率提高有关，可能是通过增强含稀土盐的吸附和/或它们与瞬态钠石样铝硅酸盐的结合。我们的研究结果不仅强调了al源选择对控制中间相形成和促进挥发性放射性核素早期合并和固定化的重要影响，而且还建立了核磁共振波谱因子分析作为了解玻璃化过程中结构和化学转变的有力方法。

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引用次数: 0

Volume increase of silica glass due to water intercalation and silanol group formation 由于水的插入和硅醇基的形成，硅玻璃的体积增加

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-18 DOI: 10.1016/j.jnoncrysol.2025.123924

Manuel Enns , Wolfgang Körner , Christian Elsässer , Daniel F. Urban

We present a theoretical study on the change of volume of silica glass due to the intercalation of molecular water and the formation of silanol groups. By a statistical representative set of density functional theory calculations, we obtained a volume increase per mole of molecular water in amorphous SiO₂ of 2.5 cm

^{3}

/mol. For the reaction of water to silanol groups we found a volume increase of 8.7 cm

^{3}

/mol. These results partially deviate from previous experimental and theoretical work concerning the mechanisms and the size of the volume change: according to our simulations, the volume change due to molecular water is not negligible. Furthermore, our results show that the exothermic dissolution of H

_{2}

O into silanol pairs is not restricted to small rings of size three and four. We find an equal distribution over all ring sizes which we explain by the structural relaxation and the related energy gain of the entire amorphous neighbourhood. Most exothermic dissolution of H

_{2}

O may happen at five-membered rings since they outnumber the three- and four-membered rings in amorphous SiO₂.

本文从理论上研究了水分子的插入和硅醇基的形成对硅玻璃体积变化的影响。通过一组具有统计代表性的密度泛函理论计算，我们得到了非晶SiO2中每摩尔分子水的体积增加2.5 cm3/mol。对于水与硅醇基团的反应，我们发现体积增加了8.7 cm3/mol。这些结果部分偏离了先前关于体积变化的机理和大小的实验和理论工作：根据我们的模拟，分子水引起的体积变化是不可忽略的。此外，我们的结果表明，水的放热溶解成硅醇对并不局限于小环尺寸为3和4。我们发现在所有环尺寸上都有一个相等的分布，我们用整个非晶邻域的结构弛豫和相关能量增益来解释这一分布。大多数水的放热溶解可能发生在五元环上，因为它们比无定形SiO2中的三元环和四元环多。

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引用次数: 0

Enhancing microstructure and mechanical properties of Fe-based amorphous coatings via optimized HVOF processing 优化HVOF工艺提高铁基非晶涂层的显微组织和力学性能

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-12 DOI: 10.1016/j.jnoncrysol.2025.123917

Xiangyang Peng , Qing Du , Shuo Hou , Peipei Cao , Ziyi Li , Xianzhen Wang , Lihong Zhai , Guangyao Lu , Yuan Wu , Xiongjun Liu

Fe-based metallic glasses exhibit high strength and hardness, as well as excellent wear and corrosion resistance, demonstrating significant potential as protective coatings in energy and chemical industries. Among various coating-preparation methods, high-velocity oxygen fuel (HVOF) spraying is widely used due to its ability to achieve high amorphous content and dense coatings. Spraying conditions in the HVOF process, particularly the gun length, significantly affect the phases and microstructure of the coating. In this study, three Fe_50.5Cr₁₉Mo₉Si₁C_12.5B₈ amorphous coatings were prepared by varying the gun length. XRD, DSC, and SEM analyses were conducted to investigate differences in coating microstructure, phase distribution, and thermal stability. The evolution of bond strength and coating hardness was attributed to coating porosity and carbide content, both of which are influenced by superheating during the spraying process. This study provides guidance for optimizing the preparation of Fe-based amorphous coatings.

铁基金属玻璃具有高强度和硬度，以及优异的耐磨损和耐腐蚀性，在能源和化学工业中作为保护涂层显示出巨大的潜力。在各种涂层制备方法中，高速氧燃料（high- speed oxygen fuel， HVOF）喷涂因其能获得高非晶含量和致密涂层而得到广泛应用。HVOF工艺的喷涂条件，特别是喷涂枪的长度，对涂层的相和显微组织有显著的影响。在本研究中，通过改变枪长制备了三种Fe50.5Cr19Mo9Si1C12.5B8非晶涂层。通过XRD、DSC和SEM分析了涂层微观结构、相分布和热稳定性的差异。涂层孔隙率和碳化物含量是影响涂层结合强度和涂层硬度变化的主要因素，而涂层孔隙率和碳化物含量均受喷涂过程中过热的影响。该研究为铁基非晶涂层的优化制备提供了指导。

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引用次数: 0

Broadband ∼2 μm emissions of Tm3+/Ho3+ co-doped fluorozirconate glasses Tm3+/Ho3+共掺杂氟锆酸盐玻璃的宽带~ 2 μm发射

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-27 DOI: 10.1016/j.jnoncrysol.2025.123927

Zeming Tan , Longfei Zhang , Zihua Guo , Hongxing Dong , Yiguang Jiang , Long Zhang

Herein, 50ZrF₄–33BaF₂–6YF₃–4LaF₃–7AlF₃ (ZBYLA) glass, demonstrating remarkable thermal and chemical stability, is successfully designed and fabricated by modifying 50ZrF₄–33BaF₂–10YF₃–7AlF₃ (ZBYA) glass composition through La³⁺ doping. Differential thermal analyses and immersion tests reveal that the ZBYLA glass possesses a crystallization resistance superior to that of the ZBYA glass (ΔT = 79 °C). Moreover, following 18 h of immersion, the ZBYLA glass exhibits significantly lower mass loss and reduced mid-infrared transmission loss; these results collectively confirm its enhanced stability. Furthermore, when co-doped with 4 mol% Tm³⁺ and 0.2 mol% Ho³⁺, the ZBYLA glass yields a ∼2 μm emission peak with the highest fluorescence intensity and broadest full width at half maximum of 421 nm, along with the longest Tm³⁺ fluorescence lifetime (τ_Tm = 5.18 ms) observed for this system. Finally, the mechanism of energy transfer (ET) between Tm³⁺ and Ho³⁺ is investigated, and a forward ET parameter significantly larger than the reverse parameter is revealed, which confirms the high efficiency of ET from Tm³⁺ to Ho³⁺. Overall, these findings indicate that the considerably high Tm³⁺/Ho³⁺ ratio in ZBYLA glass is advantageous for broadening the ∼2 μm emission and simultaneously enhancing its intensity. This positions Tm³⁺/Ho³⁺ co-doped ZBYLA glass as a highly promising candidate for application in tunable lasers and broadband amplifiers in the ∼2 μm band.

本文通过La³+掺杂对50ZrF₄-33BaF₂-10YF₃-7AlF3 （ZBYA）玻璃成分进行修饰，成功设计并制备了具有良好热稳定性和化学稳定性的50ZrF₄-33BaF₂-6YF₃-7AlF3 （ZBYA）玻璃。差热分析和浸渍试验表明，ZBYLA玻璃具有优于ZBYA玻璃的抗结晶性（ΔT = 79°C）。此外，浸泡18 h后，ZBYLA玻璃的质量损失和中红外透射损失显著降低；这些结果共同证实了其增强的稳定性。此外，当共掺杂4 mol% Tm³+和0.2 mol% Ho³+时，ZBYLA玻璃产生了约2 μm的发射峰，荧光强度最高，半峰宽度最宽，为421 nm，并且该体系中观察到最长的Tm³+荧光寿命（τTm = 5.18 ms）。最后，对Tm +和Ho +之间的能量传递（ET）机理进行了研究，发现正向ET参数明显大于反向ET参数，证实了Tm +向Ho +的高效ET。总的来说，这些发现表明ZBYLA玻璃中相当高的Tm³+ /Ho³+比有利于拓宽~ 2 μm发射，同时增强其强度。这使得Tm³+ /Ho³+共掺杂ZBYLA玻璃成为一种非常有前途的候选材料，可用于~ 2 μm波段的可调谐激光器和宽带放大器。

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引用次数: 0

Tunable amorphous Ge quantum dot networks in SiC & Si₃N₄ for broad-spectrum photoelectric devices 用于广谱光电器件的SiC & Si₃N₄可调谐无定形Ge量子点网络

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-27 DOI: 10.1016/j.jnoncrysol.2025.123930

Gabrijela Svalina , Martina Mumelaš Petričević , Ivana Periša , Marija Tkalčević , Krešimir Salamon , Peter Nadazdy , Peter Siffalovic , Maja Mičetić

Highly efficient broadband photo-electric devices require materials with tunable photoelectric properties and scalable, low complexity fabrication routes. In this work, we demonstrate thin films comprising three-dimensional, self-assembled networks of amorphous germanium quantum dots (Ge QDs) embedded in amorphous silicon carbide (SiC) and silicon nitride (Si₃N₄) matrices on p-type Si substrates. All materials are produced by single-step magnetron sputtering process without any substrate pre-treatment, lithography, or post-growth modification. By systematically varying QD size and matrix composition, we reveal how quantum confinement and host material jointly determine photoresponse. Both matrices exhibit size-dependent confinement effects in the embedded QDs, with smaller QDs providing higher responsivity and broader spectral coverage. The matrix type strongly influences current–voltage characteristics, while dark current decreases with reducing QD size. Despite their fully amorphous structure and simple fabrication, the devices achieve external quantum efficiencies up to∼60 %, detectivities of 3 × 10¹¹ Jones, and sensitivities near 9 × 10³ at room temperature across 315–1100 nm. These findings establish tunable amorphous Ge QD networks in oxygen-free matrices as cost-effective, high-performance platforms for broadband photosensitive devices.

高效的宽带光电器件要求材料具有可调谐的光电特性和可扩展的、低复杂性的制造路线。在这项工作中，我们展示了在p型Si衬底上嵌入非晶碳化硅（SiC）和氮化硅（Si₃N₄）矩阵的非晶锗量子点（Ge QDs）的三维自组装网络薄膜。所有材料均采用单步磁控溅射工艺生产，无需衬底预处理、光刻或生长后修饰。通过系统地改变量子点大小和矩阵组成，我们揭示了量子约束和宿主材料如何共同决定光响应。这两种矩阵在嵌入的量子点中都表现出尺寸依赖的约束效应，较小的量子点提供更高的响应率和更宽的光谱覆盖。矩阵类型强烈影响电流-电压特性，暗电流随量子点尺寸的减小而减小。尽管其完全无定形结构和简单的制造，器件实现外部量子效率高达~ 60%，探测3 × 10¹¹琼斯，和灵敏度接近9 × 10³在室温下315-1100 nm。这些发现在无氧基质中建立了可调谐无定形Ge量子点网络，作为宽带光敏器件的经济高效的高性能平台。

{"title":"Tunable amorphous Ge quantum dot networks in SiC & Si₃N₄ for broad-spectrum photoelectric devices","authors":"Gabrijela Svalina , Martina Mumelaš Petričević , Ivana Periša , Marija Tkalčević , Krešimir Salamon , Peter Nadazdy , Peter Siffalovic , Maja Mičetić","doi":"10.1016/j.jnoncrysol.2025.123930","DOIUrl":"10.1016/j.jnoncrysol.2025.123930","url":null,"abstract":"<div><div>Highly efficient broadband photo-electric devices require materials with tunable photoelectric properties and scalable, low complexity fabrication routes. In this work, we demonstrate thin films comprising three-dimensional, self-assembled networks of <strong>amorphous germanium quantum dots (Ge QDs)</strong> embedded in <strong>amorphous silicon carbide (SiC) and silicon nitride (Si₃N₄) matrices</strong> on p-type Si substrates. All materials are produced by single-step magnetron sputtering process without any substrate pre-treatment, lithography, or post-growth modification. By systematically varying QD size and matrix composition, we reveal how quantum confinement and host material jointly determine photoresponse. Both matrices exhibit size-dependent confinement effects in the embedded QDs, with smaller QDs providing higher responsivity and broader spectral coverage. The matrix type strongly influences current–voltage characteristics, while dark current decreases with reducing QD size. Despite their fully amorphous structure and simple fabrication, the devices achieve external quantum efficiencies up to∼60 %, detectivities of 3 × 10¹¹ Jones, and sensitivities near 9 × 10³ at room temperature across 315–1100 nm. These findings establish <strong>tunable amorphous Ge QD networks in oxygen-free matrices</strong> as cost-effective, high-performance platforms for broadband photosensitive devices.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123930"},"PeriodicalIF":3.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unraveling the impact of short-range ordering on the strengthening mechanisms in Mg-Y Alloys 揭示近程有序对Mg-Y合金强化机制的影响

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-06 DOI: 10.1016/j.jnoncrysol.2025.123903

S. Zhang , H.Y. Song , M.R. An

Rare earth (RE) alloying critically enhances Mg alloys, yet the atomistic origins of RE-driven strengthening mechanism remain elusive. Through hybrid molecular dynamics/Monte Carlo simulations, we investigate the impact of the Y concentration, short-range ordering (SRO), and temperature on the mechanical properties of the Mg alloys, specifically revealing the interaction mechanism between SRO structures and dislocation. Results demonstrate that Y solutes preferentially form localized SRO structures, which are beneficial for promoting the solid-state amorphization of the alloys. As Y concentration increases, the dominant strengthening mechanism shifts from conventional solid solution strengthening to a synergistic interplay of solid solution strengthening and SRO-induced local amorphization — elevating critical resolved shear stress by up to 50 % versus random solid solutions. Crucially, the SRO structures suppress dislocation glide via atomic-scale pinning. Furthermore, the mechanical properties of the alloys containing SRO exhibit anomalous temperature sensitivity due to the temperature-dependent stability of the SRO structures. These findings provide fundamental insights for designing advanced high-performance Mg alloys.

稀土（RE）合金对镁合金的强化作用至关重要，但稀土驱动强化机制的原子起源尚不清楚。通过混合分子动力学/蒙特卡罗模拟，研究了Y浓度、SRO和温度对镁合金力学性能的影响，揭示了SRO结构与位错之间的相互作用机制。结果表明，Y溶质优先形成局域SRO结构，有利于促进合金的固态非晶化。随着Y浓度的增加，主要的强化机制从传统的固溶体强化转变为固溶体强化和sro诱导的局部非晶化的协同相互作用——与随机固溶体相比，临界分解剪应力提高了50%。关键是，SRO结构通过原子尺度的钉住抑制位错滑动。此外，由于SRO结构的温度依赖稳定性，含SRO合金的力学性能表现出异常的温度敏感性。这些发现为设计先进的高性能镁合金提供了基础见解。

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引用次数: 0

Influence of introducing yttrium on crystallization behavior and structural characteristic of sputter-deposited Sb2Te3 thin film 引入钇对溅射沉积Sb2Te3薄膜结晶行为和结构特性的影响

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-24 DOI: 10.1016/j.jnoncrysol.2025.123928

Zhengquan Zhou , Weihua Wu , Yu Li , Zhichao Qi , Kangle Yong

The existing challenge of power consumption and the inherent trade-off between crystallization speed and thermal stability of traditional phase change materials have hindered their application in storage class memory. In this study, the physical properties and structural characterization of Y-doped and pure Sb₂Te₃ thin films were analyzed, including phase-change performance, electrical properties, optical properties, crystal structure, and crystallization mechanisms. Y doping can increase the crystallization temperature and widen the bandgap of Sb₂Te₃, significantly improving thermal stability and crystalline resistance. Also, Y incorporation can refine grain size and reduce surface roughness, which is of great significance for reducing power consumption and improving the reliability of Sb₂Te₃ material. Theoretical calculations revealed that Y doping can mitigate structural defects in Sb₂Te₃ by reducing Te-Te wrong-bonding configurations and forming robust Y-Te covalent bonds. Electrical measurements show that phase change cells based on Y-doped Sb₂Te₃ exhibit lower power consumption and faster switching speeds than those of Ge₂Sb₂Te₃. These findings prove that yttrium doping can effectively improve the thermal stability, resistance drift, and power consumption of Sb₂Te₃ material, providing an important insight to enhance the comprehensive performance of phase-change memory.

传统相变材料存在的功耗挑战和结晶速度与热稳定性之间的内在权衡阻碍了其在存储级存储器中的应用。本研究分析了y掺杂和纯Sb2Te3薄膜的物理性能和结构表征，包括相变性能、电学性能、光学性能、晶体结构和结晶机理。Y掺杂可以提高Sb2Te3的结晶温度，拓宽其带隙，显著提高其热稳定性和晶阻。此外，Y的加入可以细化晶粒尺寸，降低表面粗糙度，这对降低Sb2Te3材料的功耗和提高材料的可靠性具有重要意义。理论计算表明，Y掺杂可以通过减少Te-Te错误键构型和形成稳健的Y- te共价键来减轻Sb2Te3的结构缺陷。电学测量表明，基于y掺杂Sb2Te3的相变电池比基于Ge2Sb2Te3的相变电池具有更低的功耗和更快的开关速度。这些发现证明了钇掺杂可以有效改善Sb2Te3材料的热稳定性、电阻漂移和功耗，为提高相变存储器的综合性能提供了重要的见解。

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引用次数: 0

Powder metallurgy for dental biomaterials: Applications, processing, properties and clinical relevance 牙科生物材料的粉末冶金：应用、加工、性能和临床意义

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-19 DOI: 10.1016/j.jnoncrysol.2025.123921

Amirhossein Moghanian , Sirus Safaee , Ahmet Akif Kizilkurtlu , Mohammad Mehrdar , Ramin Farmani , Soroush Mehrani , Ali Akpek , Mahdis Nesabi

Advances in powder metallurgy (PM) have revolutionized the fabrication of dental biomaterials by enabling precise microstructural control and tailored porosity (up to 80 % porosity in scaffolds) while simultaneously reducing waste and processing time. Although conventional PM processes offer a versatile toolkit for dental applications, consolidation techniques achieve near-full densification (exceeding 85 % of theoretical density) and refine microstructures in metallic and ceramic dental restoratives, resulting in enhanced mechanical integrity (compressive strength up to 203 MPa for TiB₂/Ti composites) and biocompatibility. Post-processing treatments, ranging from thermal unbinding and sintering schedules to surface modifications, further optimize the mechanical performance (Young’s modulus matching bone at 2.2–12.1 GPa), surface finish, and corrosion resistance of the PM-derived dental components. A diverse array of biomaterials, including titanium–indium alloys for endodontic posts and cobalt–chromium partial denture frameworks, has been successfully produced via PM, demonstrating favorable osseointegration and mechanical performance (tensile strength up to 290 MPa for Ta-Zr alloys). Comprehensive performance evaluations, including fatigue testing, wear analysis, and cytocompatibility assays, confirm the clinical viability of PM-fabricated dental biomaterials. Comparative analyses further elucidate the trade-offs between process parameters, part complexity, and cost efficiency, thereby guiding rational selection for specific prosthetic applications. Nonetheless, challenges persist in scaling PM processes for custom dental geometries, managing the residual porosity (5–15 % in sintered parts), and ensuring consistent biocompatibility across diverse alloy systems. This review aims to cover and analyze these issues by mentioning recent advancements, current limitations, and the future landscape of dental PM-derived biomaterial fabrication in a wide framework.

粉末冶金（PM）的进步通过实现精确的微观结构控制和定制孔隙度（支架孔隙度高达80%），同时减少浪费和处理时间，彻底改变了牙科生物材料的制造。虽然传统的PM工艺为牙科应用提供了一个通用的工具，但固结技术可以实现近乎完全的致密化（超过理论密度的85%），并改善金属和陶瓷牙科修复体的微观结构，从而提高机械完整性（TiB2/Ti复合材料的抗压强度高达203mpa）和生物相容性。后处理，从热解绑定和烧结计划到表面修饰，进一步优化了pm衍生牙科部件的机械性能（杨氏模量在2.2-12.1 GPa与骨匹配）、表面光洁度和耐腐蚀性。多种生物材料，包括用于根管桩的钛-铟合金和钴-铬局部义齿框架，已经通过PM成功地生产出来，显示出良好的骨整合和机械性能（Ta-Zr合金的拉伸强度高达290 MPa）。综合性能评估，包括疲劳测试、磨损分析和细胞相容性分析，证实了pm制造的牙科生物材料的临床可行性。对比分析进一步阐明了工艺参数、零件复杂性和成本效率之间的权衡，从而指导了特定假肢应用的合理选择。尽管如此，在定制牙科几何形状的PM工艺中，管理残余孔隙率（烧结零件的5 - 15%）以及确保不同合金系统之间一致的生物相容性方面仍然存在挑战。本综述旨在通过在广泛的框架内提及牙科pm衍生生物材料制造的最新进展，当前限制和未来前景来涵盖和分析这些问题。

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引用次数: 0

Trace Ag addition promotes exceptional soft magnetic properties in Fe-based nanocrystalline alloys under low heating rates annealing 微量银的加入促进了铁基纳米晶合金在低加热速率退火下优异的软磁性能

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-29 DOI: 10.1016/j.jnoncrysol.2025.123934

Yaocen Wang , Yan Zhang

This article reports a unique discovery that trace addition of Ag can significantly promote nano-crystallization in Fe-based amorphous alloys during annealing, which enables excellent soft magnetic properties to be achieved under low heating rates, a condition typically challenging for such materials. The designed Fe₈₂.₆B₁₅P₁Cu₁.₃Ag₀.₁ nanocrystalline alloy exhibits outstanding soft magnetic performance of 6.5 A/m in H_c and 1.85 T in B_s at a heating rate of 10 K/min. Notably, it maintains a low H_c of 8.0 A/m and a high B_s of 1.80 T even at an exceptionally slow heating rate of 0.5 K/min, highlighting its exceptional industrial manufacturability. This effect can be attributed mainly to two factors: the large positive H_mix of Fe-Ag causes segregation and local enrichment of Fe that further promots α-Fe nucleation in addition to the effect of 1.3 at.% Cu addition, and the bonding preference of Ag-metalloid along with reduction of necessary annealing temperature suppress rapid grain growth by retard the diffusion of certain metalloid atoms. Based on this understanding, by optimizing the Fe-B-P-Cu-Ag alloy system and searching for other Fe-repelling elements including those insoluble with Fe, our finding reveals a new compositional design strategy for developing high-performance Fe-based nanocrystalline alloys that combine low H_c, high B_s, and excellent industrial processability.

本文报道了一个独特的发现，微量添加Ag可以显著促进铁基非晶合金在退火过程中的纳米结晶，这使得在低加热速率下获得优异的软磁性能，这是这类材料通常具有挑战性的条件。设计的Fe₈₂.₆B₁₅P₁Cu₁.₃Ag₀。当升温速率为10 K/min时，1₁纳米晶合金表现出优异的软磁性能，Hc为6.5 A/m， Bs为1.85 T。值得注意的是，即使在异常缓慢的0.5 K/min加热速率下，它也保持了8.0 a /m的低Hc和1.80 T的高Bs，突出了其卓越的工业可制造性。这种影响主要归因于两个因素：Fe- ag的大量正Hmix导致Fe的偏析和局部富集，进一步促进α-Fe成核。% Cu的加入和ag -类金属的键合偏好以及所需退火温度的降低通过延缓某些类金属原子的扩散来抑制晶粒的快速生长。在此基础上，通过对Fe-b -p - cu - ag合金体系的优化，以及寻找不溶于铁的其他拒铁元素，我们的发现揭示了一种新的成分设计策略，可以开发出具有低Hc、高Bs和优异工业加工性能的高性能铁基纳米晶合金。

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引用次数: 0

Effect of Si addition on mechanical properties of Ni40Zr28.5Ti16.5Al10Cu5 bulk metallic glasses Si添加对Ni40Zr28.5Ti16.5Al10Cu5大块金属玻璃力学性能的影响

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2026-02-01 Epub Date: 2025-12-12 DOI: 10.1016/j.jnoncrysol.2025.123902

Kai Wang , Guan Zhang , Xueru Fan , Dongmei Zhao , Lei Xie , Jianping Zhou , Yong Huang , Lei Che , Tiezhen Ren

This study designed and fabricated a new Ni₄₀Zr_28.5Ti_16.5Al₁₀Cu_5-XSi_X (X = 0, 0.5, 1, 1.5, 2, denoted as Si0, Si0.5, Si1, Si1.5, and Si2, respectively) bulk metallic glass (BMGs). It systematically investigated the effects of trace Si addition on the microhardness, compressive mechanical properties, and serrated flow behavior of this Ni-based BMGs. Mechanical testing revealed that at the optimal Si content (X = 1.5 at. %), the Ni-based BMG achieved a microhardness of 860 HV₁, along with a yield strength of 3154 MPa and a plastic strain of 13.9 %. Statistical analysis of stress drop data showed that their distribution exhibited a significant monotonically decreasing trend, conforming to a power-law distribution, suggesting the alloy was in a self-organized critical (SOC) state. High-resolution transmission electron microscopy (HRTEM) characterization revealed that Si addition promoted the formation of icosahedral clusters and short-range order (SRO) structures. These structures act as pinning points, inducing branching and intersection of shear bands and effectively inhibiting their propagation, thereby significantly enhancing the plastic deformation capability of the alloy.

本研究设计并制备了一种新型Ni40Zr28.5Ti16.5Al10Cu5-XSiX （X = 0,0.5, 1,1.5, 2，分别记为Si0， Si0.5, Si1, Si1.5, Si2）块体金属玻璃（bmg）。系统地研究了微量Si对ni基bmg的显微硬度、压缩力学性能和锯齿状流动行为的影响。力学试验表明，在最佳Si含量（X = 1.5 at）下。合金的显微硬度为860 HV1，屈服强度为3154 MPa，塑性应变为13.9%。对应力降数据的统计分析表明，其分布呈显著的单调减小趋势，服从幂律分布，表明合金处于自组织临界（SOC）状态。高分辨率透射电镜（HRTEM）表征表明，Si的加入促进了二十面体簇和短程有序（SRO）结构的形成。这些组织起到了钉住点的作用，诱导了剪切带的分支和相交，有效地抑制了剪切带的扩展，从而显著提高了合金的塑性变形能力。

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