Journal of Alloys and Compounds最新文献

{"title":"Hierarchical nanostructured water electrolysis catalysts: Synthesis, interfaces, defects and compositional modulation","authors":"Guoqing Huang, Xiaoqian Li, Peng Li, Peng Zhang, Shisheng Yuan, Xiubin Bu, Chuncai Yang, Zhen Zhao","doi":"10.1016/j.jallcom.2026.192183","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192183","url":null,"abstract":"Water electrolysis for hydrogen production is widely recognized as a pivotal technology for achieving global carbon neutrality goals, as it generates high-purity hydrogen with zero carbon emissions. However, the sluggish kinetics of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), coupled with complex multi-electron transfer processes and high overpotentials, severely impede energy conversion efficiency. Noble-metal-based catalysts exhibit excellent catalytic activity, but their high costs and scarce reserves constrain large-scale deployment. Accordingly, it is essential to develop cost-effective and highly active electrocatalysts while reducing reliance on scarce noble metals. Hierarchical nanostructured catalysts have attracted significant attention for water electrolysis due to their high specific surface area, abundant active sites, and excellent mass transfer capabilities. Herein, we systematically review the recent research progress on hierarchical nanostructured water electrolysis catalysts. We comprehensively discuss the regulation mechanisms of synthetic methods, interfacial effects, defect engineering and compositional modulation strategies on catalyst morphology, electronic structure, and atomic coordination environments, while elucidating the corresponding structure-activity relationships. We also outline the remaining challenges and future directions for the rational design and practical application of hierarchical nanostructured water splitting electrocatalysts.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"3 1","pages":"192183"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Composition-induced microstructural evolution and functional property tuning in Mg₀.₂Co₀.₈Fe₂O₄@SiO₂ - Y₂O₃:5 mol%Tb, 5 mol% Li magnetic–luminescent nanocomposites","authors":"Elangbam Chitra Devi, Pushparani Ningthoujam, Sumitra Phanjoubam","doi":"10.1016/j.jallcom.2026.192211","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192211","url":null,"abstract":"Multifunctional magnetic–luminescent composites comprising Mg₀.₂Co₀.₈Fe₂O₄@SiO₂ and Y₂O₃:5 mol%Tb,5 mol% Li were synthesized using a combination of co-precipitation, Stöber coating, and urea hydrolysis techniques. Three different composition ratios were prepared to investigate the influence of composition on structural, morphological, magnetic and photoluminescent properties. X-ray diffraction confirmed the coexistence of spinel ferrite and cubic Y₂O₃ phases, while variations in diffraction peak intensities indicated composition-dependent changes in crystallization behavior. Additional minor XRD reflections in highest ferrite composition suggest the possible presence of YFeO₃ as a secondary phase. FTIR analysis verified the retention of the characteristic vibrational features of the constituent phases. FESEM observations revealed a gradual reduction in particle size and significant morphology evolution with increasing ferrite content, suggesting modified nucleation and growth processes during composite formation. EDS analysis confirmed the presence of all constituent elements. FETEM and SAED investigations confirmed the agglomerated nanocrystalline and polycrystalline nature of the representative composite, consistent with the FESEM and XRD analyses. STEM–EDS elemental maps provided complementary insight into the spatial distribution of the constituent elements, supporting the incorporation of Mg₀.₂Co₀.₈Fe₂O₄@SiO₂ in the composite, and revealing composition-dependent variations in the morphological distribution of the composite constituents. The saturation magnetization initially increased with ferrite content and reached a maximum at the intermediate composition, followed by a decrease at the highest ferrite concentration. On the other hand, the photoluminescence emission and excitation intensity of the characteristic Tb³ ⁺ emissions decreases progressively while the average lifetime increases with increasing ferrite content. The observed variations in magnetic and luminescent properties are attributed to composition ratios, microstructural evolution and secondary phase formation. The results demonstrate that the multifunctional performance of Mg₀.₂Co₀.₈Fe₂O₄@SiO₂–Y₂O₃:5 mol% Tb, 5 mol% Li composites is strongly dependent on the relative proportions of the magnetic and luminescent components, highlighting the importance of compositional balance in tailoring their combined functionalities.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"12 1","pages":"192211"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strengthening and stabilization mechanism of in-situ aluminum matrix composites via stepwise oxidation strategy","authors":"Xin Zhang, Yifan Liang, Jun Wang, Xin Li, Lei Liu, Dawei Pang, Dongxu Hui, Shaodi Wang, Bo Li, Shufeng Li","doi":"10.1016/j.jallcom.2026.192221","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192221","url":null,"abstract":"In response to the bottleneck problems faced by in-situ reaction preparation of nano Al₂O₃ reinforced aluminum matrix composites (AMCs), such as high reaction temperature, uncontrollable reaction products affecting matrix composition and obvious agglomeration phenomenon, which leads to insufficient strengthening effect and thermal stability. This study proposes an innovative process of cyclic ball milling-stepwise oxidation combined with powder metallurgy, which achieves controllable introduction of nano Al<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> by precisely regulating the oxidation process of the powder. The formation and evolution of in-situ nano-Al₂O₃ in powder metallurgy process are systematically studied. By establishing the relationship between the microstructure and interface structure evolution of the composites and the performance, the strengthening and stabilization mechanisms of nano-Al₂O₃ on AMCs are systematically revealed. The results indicate that the in-situ amorphous Al₂O₃ content can be effectively controlled by regulating the parameters of cyclic oxidation while achieving its dispersion distribution through uniform oxidation of the powder. Amorphous Al₂O₃ can be crystallized into nano γ-Al₂O₃ whiskers during sintering, forming a coherent interface with Al matrix. It effectively suppresses the coarsening and recrystallization of Al matrix grains under consolidation and high-temperature thermal exposure through the pinning effect, stimulates the proliferation and homogenization of dislocations and limits its slip. It fully exerts the strengthening effect of nano γ-Al₂O₃ while improves the strain hardening ability of AMCs, resulting in an increase in the strength to 385 MPa, which is 3.26 times that of the matrix. At the same time, the mechanical properties of AMCs are only reduced by 0.5~8.1% after annealing at 600 °C, while maintaining good plasticity. Under the synergistic effect of Orowan strengthening, grain refinement strengthening, thermal mismatch strengthening and load transfer, a good match of strength and plasticity and a synergistic improvement of thermal stability are achieved.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":"192221"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excitation-selective green downconversion and red upconversion emission in Li+-modified CaZrO3:Er3+/Yb3+ phosphors","authors":"Hoang Tuan Nam, Nguyen Minh Tu, Nguyen Ngoc Thinh, Nguyen Xuan Truong, Pham Van Huan, Van-Duong Dao, Nguyen Huu Tuan, Nguyen Duc Toan, Nguyen Trong Nghia, Hoang Nhu Van","doi":"10.1016/j.jallcom.2026.192199","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192199","url":null,"abstract":"In this work, excitation-selective green downconversion (DC) and red upconversion (UC) emissions in CaZrO<ce:inf loc=\"post\">3</ce:inf>:Er<ce:sup loc=\"post\">3+</ce:sup>/Yb<ce:sup loc=\"post\">3+</ce:sup> phosphors were systematically investigated and modulated through Li<ce:sup loc=\"post\">+</ce:sup> incorporation using the solution combustion method, followed by heat treatment at 1200 ℃ in air. Rietveld refinement together with X-ray photoelectron spectroscopy (XPS) analysis suggested that Li<ce:sup loc=\"post\">+</ce:sup> incorporation significantly modifies the local crystal-field environment and reduces the symmetry around the rare-earth ions. Such structural distortion may contribute to the observed changes in green and red emission intensities. Raman spectroscopy further supported the Li<ce:sup loc=\"post\">+</ce:sup>-induced lattice distortion through broadened vibrational modes and changes in the effective phonon energy. Under 379 nm excitation, the phosphors exhibit dominant green emission at 528–550 nm and weak red emission at 664 nm, whereas 975 nm excitation produces strong red UC emission. Li<ce:sup loc=\"post\">+</ce:sup> incorporation significantly modifies the relative intensities of the green and red DC emissions, while the optimal Li<ce:sup loc=\"post\">+</ce:sup> concentration results in an approximately sixfold enhancement of the red UC emission. The enhanced red emission intensity may be associated with crystal-field modulation and possible charge-compensation effects induced by Li<ce:sup loc=\"post\">+</ce:sup> incorporation. These findings demonstrate that Li<ce:sup loc=\"post\">+</ce:sup> co-doping is a simple and effective approach for modulating the intensities of excitation-selective green DC and red UC emissions, highlighting the potential of these phosphors for anti-counterfeiting applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"59 1","pages":"192199"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term modification stability and strengthening mechanisms in die-cast Al–9Si–2Cu alloys with minor Sr and Er additions","authors":"Qiao Zheng, Zhenping Wu, Hong Yan, Chao Luo, Hua Li, Xiewei Xie, Lishibao Ling, Zhi Hu","doi":"10.1016/j.jallcom.2026.192114","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192114","url":null,"abstract":"Achieving a stable strength–ductility balance in industrial die-cast Al–9Si–2Cu alloys remains challenging because prolonged melt holding can weaken the modification effect. Herein, a high-performance die-cast Al-9Si-2Cu alloy was developed using minor amounts of Sr and Er under industrial die-casting conditions, achieving tensile strength and elongation of 324 MPa and 3.47%, respectively, while the modifiers maintained effective behavior for at least 90 min. TEM results indicate that Sr forms Al<ce:inf loc=\"post\">2</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf>Sr clusters with Al and Si, promoting the formation of numerous 70.5° branched twins in eutectic Si, thereby significantly refining the eutectic Si. Meanwhile, the numerous twins interweave with each other to generate stacking faults, which delay twin growth rates and even alter growth directions, further promoting the refinement of eutectic Si. Moreover, Er mainly contributes to precipitation strengthening by forming fine Al<ce:inf loc=\"post\">3</ce:inf>Er particles (~10 nm) and Al<ce:inf loc=\"post\">8</ce:inf>Cu<ce:inf loc=\"post\">4</ce:inf>Er particles (200–900 nm). Al<ce:inf loc=\"post\">3</ce:inf>Er particles impede dislocation motion through Orowan bypassing, whereas Al<ce:inf loc=\"post\">8</ce:inf>Cu<ce:inf loc=\"post\">4</ce:inf>Er particles restrict grain-boundary migration and local deformation near adjacent grains. These coupled modification and strengthening mechanisms provide a practical and cost-effective strategy for the stable industrial production of high-performance Al–Si–Cu die castings.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"12 1","pages":"192114"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interfacial engineering of PVDF/Ni@MXene composites toward absorption-dominated electromagnetic interference shielding with enhanced mechanical robustness","authors":"De Li, Xin Kang Li, Qian Lai, Jun Jun Wu, Hai Lan Lin, Shang Ke Yang, Ai Ping Zhang, Jun Bian, Dai Qiang Chen","doi":"10.1016/j.jallcom.2026.192165","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192165","url":null,"abstract":"Polymer-based electromagnetic interference (EMI) shielding films require efficient attenuation and sufficient mechanical strength for flexible applications. Here, Ni particles were deposited on Ti<ce:inf loc=\"post\">₃</ce:inf>C<ce:inf loc=\"post\">₂</ce:inf>T<ce:inf loc=\"post\">ₓ</ce:inf> MXene nanosheets, and the resulting Ni@MXene fillers were incorporated into poly(vinylidene fluoride) (PVDF) by solution casting. The nominal Ni/MXene precursor ratio and total filler loading were varied to examine their effects on film structure and performance. Structural characterization indicates modified nanosheet packing, retained polar surface groups, and changes in PVDF crystalline organization. A nominal Ni/MXene ratio of 6:1 gives the highest shielding effectiveness within the fixed-loading series. At 50 wt% filler, the composite reaches a maximum X-band shielding effectiveness of approximately 33 dB, an effective absorption coefficient of 99.96%, and a thickness-normalized specific shielding effectiveness (SSE/t) of 2341.95 dB·cm²/g. At 40 wt%, it retains a conductivity of 59.320 S/cm and approximately 28 dB maximum shielding effectiveness, with higher tensile strength (33.76 MPa), modulus (290.17 MPa), and PVDF crystallinity (44.05%) than the 50 wt% film. The results support an interface-rich architecture that combines conductive pathways with polarization-active regions. Within the investigated series, 50 wt% maximizes conductivity and shielding, whereas 40 wt% provides the more balanced combination of electromagnetic and mechanical properties<ce:bold>.</ce:bold>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"81 1","pages":"192165"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling atomic-scale divergent deformation mechanisms in Ni-Ta binary metallic glass fabricated by in-situ cryogenic laser surface remelting","authors":"Ruihan Zhao, Yanlong Fan, Hongtao Zhang, Junlin Pan, Rongmao Du, Yu Sun","doi":"10.1016/j.jallcom.2026.192172","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192172","url":null,"abstract":"Binary refractory metallic glasses, consisting solely of a matrix element and a refractory metal, are ideal model systems for probing deformation behavior and the distinct roles of constituent atoms. However, their relatively weak glass-forming ability and the lack of efficient, low-cost fabrication strategies have severely limited related studies. Herein, Ni–Ta binary refractory metallic glass was successfully fabricated via spark plasma sintering combined with ultrafast laser surface remelting, where liquid nitrogen was introduced to construct an in-situ cryogenic environment. Finite element analysis (FEA) was performed to investigate the temperature evolution and glass formation during this process. Microstructural and mechanical characterizations including optical microscope, scanning electron microscope, microscale X-ray diffraction and nanoindentation were conducted on the remelted layer, while in-situ micro-pillar compression tests were implemented to capture compressive deformation behaviors. Molecular dynamics (MD) simulations further compared the Voronoi polyhedra dominated by each atomic species and revealed the chemical selectivity and kinetic disparities of shear transformation zones (STZs) during compressive loading. This work not only provides a promising and widely applicable strategy for the efficient fabrication of binary metallic glasses, but also deepens the understanding of atom-specific behavior differences under compressive loading.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"15 1","pages":"192172"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A dislocation-dynamics model for the barb-shaped strength-plasticity relation in aged Al-Mg-Si wires","authors":"Shuo Wang, Jiapeng Hou, Xueyuan Fan, Zhan Qu, Xiaotao Li, Zhenjun Zhang, Hanzhong Liu, Xiaowu Li, Zhefeng Zhang","doi":"10.1016/j.jallcom.2026.192203","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192203","url":null,"abstract":"6xxx series Al alloys are widely used as raw materials for automotive electronic wiring harnesses. Beyond lightweighting and electrical conductivity, achieving an optimal synergy between strength and plasticity is essential. However, their ultimate tensile strength (UTS) and uniform elongation (UE) exhibit a pronounced trade-off during aging, typically manifesting as a \"barb-shaped\" relationship. To elucidate the origin of this peculiar behavior, a quantitative framework was developed by adopting the Kocks-Mecking-Estrin (KME) model to correlate macroscopic strength-plasticity evolution with microstructural changes in Al-Mg-Si wires across different aging states. Two key parameters, the dislocation multiplication parameter Θ<ce:inf loc=\"post\">Ⅱ</ce:inf> and annihilation parameter <ce:italic>n</ce:italic>, were introduced to quantify dislocation activity. A macroscopic UTS-UE model was established to reveal the \"barb-shaped\" strength-plasticity relationship co-regulated by Θ<ce:inf loc=\"post\">Ⅱ</ce:inf> and <ce:italic>n</ce:italic> during aging. Furthermore, Θ<ce:inf loc=\"post\">Ⅱ</ce:inf> and <ce:italic>n</ce:italic> were parameterized as binary functions of precipitate radius <ce:italic>r</ce:italic> and volume fraction <ce:italic>f</ce:italic><ce:inf loc=\"post\">v</ce:inf>, thereby quantifying how precipitate characteristics regulate dislocation storage and dynamic recovery. Overall, an integrated quantitative predictive framework linking microstructure, dislocation dynamics, and macroscopic mechanical properties was established, with Θ<ce:inf loc=\"post\">Ⅱ</ce:inf> and <ce:italic>n</ce:italic> serving as the bridge. The proposed approach provides a dislocation-dynamics-based paradigm for interpreting the \"barb-shaped\" strength-plasticity trade-off in precipitation-strengthened Al alloys.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"11 1","pages":"192203"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constructing CoNi alloy/high-entropy oxide heterojunctions via selective surface reduction for rapid visible-light-driven ammonia borane methanolysis","authors":"Yufeng Jiang, Jingjing Deng, Xiaodong Chen, Zemin Huang, Yi Lin, Yanrui He, Youxiang Shao, Hao Li","doi":"10.1016/j.jallcom.2026.192210","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192210","url":null,"abstract":"On-demand hydrogen supply through ammonia borane (AB) dehydrogenation is a promising strategy, yet its practical viability is severely limited by the prohibitively high cost of noble-metal catalysts. Herein, we aim to develop a series of spinel-type CoNiFeZnCr high-entropy oxide (HEO) derivatives via a facile hydrothermal method followed by selective H<ce:inf loc=\"post\">2</ce:inf>/Ar reduction. By exploiting the distinct reduction potentials of constituent metal ions, CoNi alloy nanoparticles are in-situ generated on the HEO surface, forming a well-defined heterojunction. The optimal HEO-D-750 catalyst delivers 65 mL of H<ce:inf loc=\"post\">2</ce:inf> within the first minute under visible-light irradiation with a low activation energy of 27.7 kJ·mol<ce:sup loc=\"post\">−1</ce:sup>. The superior catalytic performance originates from the combined action of the heterojunction, which promotes efficient charge carrier separation and prolongs their lifetime, and the plentiful active sites supplied by the well-dispersed CoNi alloy nanoparticles. This work offers a feasible strategy for designing non-noble-metal heterojunction catalysts through entropy-driven structural engineering.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":"192210"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring the phase transformation behavior and damping capacity of Cu-13.5Al-3.5Ni alloy via heat treatment","authors":"Tiantian Guo, Hongjie Jiang, Shuhui Liu, Enlang Feng, Yifan Mao, Maomi Zhao","doi":"10.1016/j.jallcom.2026.192116","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.192116","url":null,"abstract":"To improve the damping capacity of the Cu-Al-Ni alloy and achieve a tunable damping temperature range for more effective vibration and noise mitigation in marine engineering, this study subjected the Cu-13.5Al-3.5Ni alloy to isothermal homogenization and isothermal quenching treatments to investigate the effects of heat treatment schedules on its phase transformation characteristics and damping performance. The results indicate that two damping responses occur in the non-homogenized sample, namely those associated with eutectoid decomposition and martensitic transformation. After homogenization for 4 h, the sample shows only the damping response associated with martensitic transformation, whereas after homogenization for 12 h, only the damping response related to eutectoid decomposition phase transformation. The damping temperature window corresponding to martensitic transformation is usually narrower and located at lower temperatures compared with that of eutectoid decomposition. The sample homogenized for 4 h and subsequently quenched for 60 min (CAN-4–60 sample) exhibits the highest damping capacity and comprehensive damping index. At 125 °C, the internal friction value and <ce:italic>E</ce:italic><ce:inf loc=\"post\"><ce:italic>IF</ce:italic></ce:inf> value of the CAN-4–60 sample are 5900% and 3202% higher than those of the as-cast Cu-13.5Al-3.5Ni alloy, respectively. The CAN-12–60 sample (homogenized for 12 h and then quenched for 60 min) exhibits the widest phase transformation damping temperature range (0 °C-175 °C). The damping mechanism of the alloy is derived from the back-and-forth displacement of phase interfaces under externally applied stress, which triggers eutectoid decomposition or martensitic transformation and converts mechanical energy into internal energy for dissipation.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"79 1","pages":"192116"},"PeriodicalIF":6.2,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}