Journal of Alloys and Compounds最新文献

{"title":"Deformation behavior during low-temperature rolling and the multi-scale evolution mechanism of macro and microstructures in CuCrZr alloy","authors":"Qi Li, Yahui Liu, Qianqian Zhu, Yanjun Zhou, Jiang Feng, Hailong Wang, Qingxiang Chen, Xuebin Zhang, Mengna Zhang, Lei Zhao, Binbin Wang, Yunxiang Li, Kexing Song","doi":"10.1016/j.jallcom.2025.181261","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181261","url":null,"abstract":"To address the insufficient ductility of CuCrZr copper alloy under the simultaneous demands for high strength and high electrical conductivity, we propose a process strategy that combines dual gradient temperature controlled rolling with aging treatment to comprehensively optimize the alloy’s performance. This approach alternates rolling at room and cryogenic temperatures, induces nanoscale twinning during low temperature deformation, and leverages the temperature gradient to tailor the alloy’s microstructure, thereby enhancing its overall properties. After the cryogenic deformation process, the alloy reached an ultimate tensile strength of 387.5<!-- --> <!-- -->MPa, an electrical conductivity of 84.6% IACS, and an elongation of 12.45%. The results demonstrate that, compared with room temperature rolling, the dual low temperature rolling process more effectively refines grain size, significantly strengthens the S and Brass texture components, and induces nanoscale twinning while also promoting a uniform distribution and high volume fraction of nanoscale precipitates. Crucially, the high density dislocation rearrangement triggered during cryogenic rolling together with twin boundaries that serve as dislocation slip pathways effectively alleviates local stress concentrations and thus significantly improves the alloy’s ductility. Furthermore, quantitative analysis of various strengthening mechanisms shows that the increase in yield strength is primarily attributable to grain boundary strengthening and precipitation strengthening, while the substantial residual dislocation density remaining after secondary aging further reinforces the overall strengthening effect.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"10 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145805","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":"Novel synthesis of PbTiO3/CoFe2O4 based on graphene oxide as potential materials for enhancing efficient energy storage using multivariate optimization method","authors":"Neda Aryan, Mohammadreza Mansournia","doi":"10.1016/j.jallcom.2025.181258","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181258","url":null,"abstract":"Hydrogen storage is key to developing fuel cells and hydrogen technologies for use in transportation, portable power, and stationary power. Hydrogen storage compounds are needed for renewable energy vehicles. With this aim, PbTiO₃/CoFe₂O₄ on graphene oxide (GO) was designed as materials of electrode for applications of electrochemical hydrogen storage through a straightforward approach. The hydrogen storage performance of the samples was characterized based on the chronopotentiometry technique in an alkaline environment. First, the experimental design was carried out using the rotating central composite method for three practical factors. After synthesizing the nanocomposite using the new process, charging and discharging were carried out using the chronopotentiometry method for 17 designed experiments, and then optimization was done using the response surface method. The discharge capacity of the PbTiO₃/CoFe₂O₄/GO nanocomposite was evaluated to be 2859.5 mAhg^-1 after 12 cycles. Cyclic voltammetry was then used to determine the pristine electrochemical properties of the PbTiO₃/CoFe₂O₄/GO nanocomposite, where the anodic and cathodic peak currents were about 0.0116 and -0.006<!-- --> <!-- -->A, respectively. The products were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, elemental mapping and N₂ adsorption-desorption techniques<strong>.</strong> The results indicate the average crystallite size of 25.3<!-- --> <!-- -->nm and average pore diameter of 2.17<!-- --> <!-- -->nm in the case of PbTiO₃/CoFe₂O₄/GO nanocomposite based on the scherrer equation and BJH pore size distribution plot, respectively. Furthermore, electrochemical impedance spectroscopy (EIS) results showed that the polarization resistance of the PbTiO₃/CoFe₂O₄/GO sample is 176 Ω.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"12 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145802","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":"Coral-Like 3D-Co Nanoflowers Anchored on Reduced Graphene Oxide for Enhancing Hydrogen Generation of NaBH4","authors":"Yijie Wang, Lixian Sun, Yujia Sun, Fen Xu, Lingjun Song, Xuan Peng, Hehui Wang, Zhongxian Zhao, Yanming Su, Hongge Pan","doi":"10.1016/j.jallcom.2025.181241","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181241","url":null,"abstract":"Sodium borohydride (NaBH₄) is recognized as an important material for hydrogen storage and transportation because of its extremely significant hydrogen storage capacity. However, achieving large-scale hydrogen generation via the hydrolysis of NaBH₄ requires efficient catalysts to enhance hydrogen evolution efficiency. In this study, a simple one-pot synthesis method was proposed to prepare 3D hierarchical flower-like materials composed of ultrathin cobalt based nanosheets（Co-3DHFLM） anchored on graphene oxide (GO), improving the dispersion of active cobalt sites. The yielded 3D-Co catalysts anchored on reduced graphene oxide (rGO) by high-temperature hydrogen reduction, can promote the structural rearrangement of active sites from planar nanoflowers to a more porous coral-like structure, thereby enhancing the stability and catalytic activity of the catalyst. Additionally, the effects of GO addition amounts and reduction temperatures on catalyst performance were systematically investigated. At a reduction temperature of 773<!-- --> <!-- -->K, 3D-Co@rGO₁₅ catalyst achieved the hydrogen generation rate of 4251.1<!-- --> <!-- -->mL·min^-1·g_Co^-1 at 303<!-- --> <!-- -->K with an activation energy of 28.1<!-- --> <!-- -->kJ·mol^-1. The results demonstrate that significant improvements in catalytic efficiency can be achieved by modulating the morphology and structure of the catalyst, providing new insights for the design of efficient composite catalysts.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"149 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144136933","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":"Artificial Synaptic Memristors Based on Egg Albumen-Gold Nanoparticle Nanocomposites","authors":"Lu Wang, Tianyu Yang, Yuehang Ju, Chunhao Li, Yuhang Tian","doi":"10.1016/j.jallcom.2025.181205","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181205","url":null,"abstract":"Memristors are considered favorable candidate devices for solving the current von Neumann bottleneck due to their integrated storage function, while biomemristors have a unique advantage in brain-like computing due to their environmental friendliness, biodegradability and biocompatibility. Memristors with synaptic plasticity can participate in the construction of neuromorphic computing systems. Here, we fabricated flexible and rigid biomemristors by incorporating egg albumen into gold nanoparticle nanocomposites as active layers. The device exhibited multilevel memory capabilities and excellent bipolar switching characteristics, including high switching-current ratio and retention time, and a stable threshold voltage distribution. The device can achieve brain synaptic potentiation and depression, excitatory postsynaptic current, paired-pulse facilitation, short-term plasticity conversion to long-term plasticity, spike-rate-dependent plasticity, spike-timing-dependent plasticity, learning-forgetting-relearning and other behaviors. The formation and breakage of electron hopping paths composed of oxygen vacancies are the main reasons for the bipolar resistive switching behavior of the memristor. Au NPs act as trapping centers in the active layer, and their Coulomb blocking effect increases the switching current ratio of the device. The low-cost, biofriendly egg-albumen-based active layer, flexible structure, and rich synaptic plasticity endow the memristor with great potential in the fields of neuromorphic computing, nonvolatile storage, and logic circuits.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"34 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144136927","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":"Influence of Ru on the Solidification and Microstructure Characteristics of Co-free Nickel-based single crystal superalloys","authors":"Zhicheng Wang, Qiang Zeng, Mingzhao Xie, Hailong Qin, Xiaofei Yuan, Jinli Xie","doi":"10.1016/j.jallcom.2025.181168","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181168","url":null,"abstract":"The solidification and microstructural features of Co-free nickel-based single crystal superalloys with different amounts of Ru were examined through OM, EDS, EMPA, and TEM. The findings reveal that the introduction of Ru into the alloy has a negligible effect on the alloy's liquidus temperature. However, Ru expands the alloy's solidification temperature range to a certain extent and complicates the feeding process during solidification, thereby promoting the formation of microporosity in directional solidification. Moreover, although Ru exhibits negligible influence on dendritic morphology, it intensifies the segregation propensity of Al, Ti, and Ta, consequently elevating the volumetric fraction of γ-γ' eutectic. Compared with alloys without Ru, the incorporation of Ru decreases the segregation degree of Re and W. An increment in Ru content curtails the γ' phase content and size in the alloy. In Co-free single-crystal superalloys, over 80% of Ru preferentially partitions into the γ matrix, thereby significantly reducing the Ni content in the γ phase. This partitioning proportion demonstrates a marked increase compared to previous observations in Co-containing single-crystal superalloys with Ru additions. The addition of Ru promotes the partitioning of a higher fraction of Re into the γ matrix compared to Ru-free counterparts, consequently, the misfit between the γ′ phase and the matrix becomes more negative, and improving the cubic degree of the γ′ phase.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"14 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144136932","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 design of corrosion resistant Fe40Mn40Co10Cr10 HEA by “dissolution-diffusion-deposition” model","authors":"Jing Dai, Hao Feng, Huabing Li, Xuzhi Cao, Pengchong Lu, Hongchun Zhu, Shucai Zhang, Kaiyi Zhang, Zhouhua Jiang, Tao Zhang","doi":"10.1016/j.jallcom.2025.181238","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181238","url":null,"abstract":"Fe₄₀Mn₄₀Co₁₀Cr₁₀ high-entropy alloy (HEA) is known for the outstanding mechanical properties. However, the poor corrosion resistance severely inhibits its popularization. To remove the corrosion problem obstructing the application of Fe₄₀Mn₄₀Co₁₀Cr₁₀ HEA, the “dissolution-diffusion-deposition” model was used to optimize its composition. Since increasing pH value significantly enhanced the corrosion resistance, the N alloying approach, which could remit the acidification of solution environment, was proposed according to the modelling calculation results. The verify experiments on the HEAs with similar compositions as those in modelling calculation show that N alloying increased the pitting potential and optimized the passive film. The oxide content and the ratio of Cr₂O₃ in passive film improved with N addition, which clarified the enhancement of protectivity. During the passivation process, N suppressed the acidification of solution mainly by the dissolving process of N, and the hydrolyzation reaction of NH₃. The alkaline environment created by N provided a favorable condition for passivation. Additionally, the CrN layer existing on the interface of matrix/passive film also played an important role in the repassivation process of matrix. The “dissolution-diffusion-deposition” model could be a powerful tool when design the corrosion resistant alloy, since it is qualified to provide a quantitative description for the influence of element addition on passivation process.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"82 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144136937","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":"Computation simulation and experiment investigations of stable co-doping perovskite solar cells with TiO2/SnO2 bilayer and CuSCN structures","authors":"Guangdong Li, Mingxiang Xu, Qingwang Bai, Xiaoping Zou, Xiao Bai","doi":"10.1016/j.jallcom.2025.181231","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181231","url":null,"abstract":"The charge transport layers play a momentous role in facilitating the extraction and injection of carriers in perovskite solar cells (PSCs). Unfortunately, the performance of PSCs fabricated with conventional charge transport materials exhibits significant hysteresis and instability. Here we utilise the composite TiO₂/SnO₂ with superior electron mobility and stability and the low-cost CuSCN as bilayer electron transport layer (ETL) and hole transport layer (HTL) materials, respectively. The PSCs with the p-n-n (p-type FA_xMA_1-xPbI_xBr_yCl_3-x-y (FA=CH(NH₂)₂), MA=CH₃NH₃)-n-type SnO₂-n-type TiO₂) construction of FTO/TiO₂/SnO₂/FA_xMA_1-xPbI_xBr_yCl_3-x-y/CuSCN/C/FTO have been investigated via the computation simulation and experiment. It has been observed that the PSCs performance of p-n-n structure surpasses that of n-n-p (n-type SnO₂-n-type TiO₂-p-type FA_xMA_1-xPbI_xBr_yCl_3-x-y) structure, benefiting from the existence of the bilayer ETL with p-n-n structure, which improves the collection ability, and the lifetime and mobility of photogenerated carriers. The perovskite thin film can be uniformly covered by the CuSCN HTL with 25<!-- --> <!-- -->μL CuSCN drop-coating solution, which effectively reducing the hysteresis of the device under the atmosphere conditions during the experiment. Furthermore, we further demonstrate that the thickness of functional layers, conduction band offset, doping concentration, and operating temperature play crucial roles in determining the photophysical and photoelectric properties of PSCs. The simulation results imply that the PSCs we designed and optimized not only have high power conversion efficiency (PCE) (17.7619%) at 295<!-- --> <!-- -->K but also maintain ascendant stability. This work shall provide up an effective strategy for the realization of high efficiency and long-term stable carbon-based PSCs.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"16 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137024","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":"Effect of cold rolling on the microstructure and plastic deformation behavior of Ti41Zr32Ni6Ta7Be14 metallic glass matrix composites","authors":"Jing Fan, Zhijie Yan, Jürgen Eckert, Wei Rao, Junwei Qiao, Diaoyu Zhou","doi":"10.1016/j.jallcom.2025.181248","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181248","url":null,"abstract":"Ti₄₁Zr₃₂Ni₆Ta₇Be₁₄ metallic glass matrix composites (MGMCs) were subjected to large plastic deformation via cold rolling. The microstructure of the cold-rolled MGMCs was characterized microscopically. Nanoindentation tests were conducted to investigate the hardness, Young’s modulus, compressive strength, and work-hardening exponent of the cold-rolled Ti₄₁Zr₃₂Ni₆Ta₇Be₁₄ MGMCs. It is found that profuse stacking faults (SFs), twins, and nanocrystalline structures are generated within the dendrites due to cold rolling, prohibiting rapid propagation of detrimental shear bands in the glass matrix, thereby enhancing the plastic deformation of the Ti₄₁Zr₃₂Ni₆Ta₇Be₁₄ MGMCs. The present work highlights the ductile deformation mechanisms of MGMCs, which is of scientific importance for their engineering applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"56 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137071","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":"The microstructure and anisotropy of compressive behavior in NiTiCu alloy fabricated by laser powder bed fusion processing","authors":"F.L. Shen, L.T. Pan, C.C. Li, W.H. Xin, Z. Lyu, X.Y. Fang, L.J. Li","doi":"10.1016/j.jallcom.2025.181242","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181242","url":null,"abstract":"The microstructure and anisotropy of compressive behavior in Ni_49.6Ti_49.4 Cu₁ alloy prepared by fusing NiTi, pure Ti, and pure Cu powders using laser powder bed fusion (LPBF) were investigated. Three distinct microstructure features were identified, namely, weakly textured columnar austenitic grains containing martensite, a gradient microstructure varying from the equiaxed grains containing martensite in the center to columnar austenitic grains at the edge of the build, and strongly textured columnar austenitic grains under different LPBF parameters. The equiaxed grains in the center of the sample built at the highest power of 400<!-- --> <!-- -->W were primarily caused by a large thermal activation upon multiple thermal cycles during LPBF. The anisotropy in the recoverable strain is primarily caused by preferred grain orientation, while the distribution of martensite in the loading direction also contributes to the anisotropy for a gradient microstructure, especially at low strain level. The critical stress for martensite formation (<em>σ</em>_<em>c</em>) and recovery strain due to shape-memory effect (SME) exhibited no anisotropy after cyclic compression and heating in boiling water, and were primarily affected by the martensitic transformation temperatures.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"132 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145824","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":"Corrigendum to “Predictive and heuristic framework for high entropy alloys design: Integrating solid solution strengthening with machine learning” [J. Alloy. Compd. 1027 (2025) 180484]","authors":"Zheng Zhang, Yuanpei Meng, Zongyu Zhang, Yansong Yang, Ying Chen, Chuanting Wang, Yong He","doi":"10.1016/j.jallcom.2025.181117","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181117","url":null,"abstract":"The authors regret “<span><span>Fig. 6</span></span>(b). was not shown in the published version. Correction: <span><span>Fig. 6</span></span> should read as follows.”.<figure><span><img alt=\"Fig. 6\" aria-describedby=\"cap0005\" height=\"276\" src=\"https://ars.els-cdn.com/content/image/1-s2.0-S0925838825026787-gr1.jpg\"/><ol><li><span><span>Download: <span>Download high-res image (220KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span><span><span><p><span>Fig. 6</span>. The ST Complexity distribution of the generated equations and the fit of the target formulation. (a) Relationship between formula training fit and formula complexity obtained by ST algorithm development. The red crosses are the selected target formulas. (b) Calculation value for the data set through Eq. (8).</p></span></span></figure>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"37 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137021","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}