Journal of Alloys and Compounds最新文献

{"title":"The oxidation mechanism of heterogeneous structured Cu-316L-xMo immiscible alloys by laser powder bed fusion","authors":"Cheng Deng, Zihao Wan, Tao Xie, Xinhua Wang, Shengfeng Zhou","doi":"10.1016/j.jallcom.2025.184487","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184487","url":null,"abstract":"Cu-316L-<em>x</em>Mo immiscible alloys were manufactured by laser powder bed fusion (LPBF) in this work. The oxidation behavior of three types Cu-316L-<em>x</em>Mo alloys at 600 °C and 700 °C were studied to reveal the influence of Mo on the oxidation kinetics, oxide scale formation and integrity. The results showed that a heterogeneous oxide layer composed of CuO and Fe₂O₃ was formed on the surface after oxidation, and locally varying oxide-thicknesses is observed due to the immiscibility of ε-Cu and γ-Fe phases. The incorporation of Mo ions into the oxide scale accelerates the oxidation rate of Cu–316L–<em>x</em>Mo alloys. The high volatility of MoO₃ compromises the integrity of the oxide scale, especially at higher temperature. Moreover, the growth and thermal stresses developed within the oxide scale during thermal cycling leads to severe cracking and spallation of the oxide scale.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"19 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314718","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":"MetaMode Deposition of Niobium Oxide Thin Films Using a Broad-Beam Ion Source","authors":"Junwoo Lee, Yifan Liu, Carson Malhado, Ming Xu, Keliang Wang, Zhen Qiu, Shi-You Ding, Richard R. Lunt, Qi Hua Fan","doi":"10.1016/j.jallcom.2025.184505","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184505","url":null,"abstract":"Niobium oxide (Nb₂O₅) thin films were deposited under MetaMode using a new broad-beam ion source-enhanced magnetron sputtering. The ion source significantly reduced the required oxygen concentration from over 20% to ~7.5% to form fully stoichiometric Nb₂O₅ films. The MetaMode deposition rates were over three times higher than conventional reactive magnetron sputtering, which requires significantly higher oxygen concentrations. The film properties were characterized using UV-Vis spectroscopy, atomic force microscopy (AFM), scanning electron microscope (SEM), x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), four-point probe, and spectroscopic ellipsometry. The MetaMode deposited Nb₂O₅ thin films exhibited smoother surfaces, better optical transmittance, and denser morphology, while overcoming the disappearing anode effect in conventional reactive sputtering.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"40 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314732","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 0.5 wt.% Cr on Precipitation Evolution and Recrystallization Behavior in Cu-Ni-Co-Si-Zn Alloys","authors":"Liusen Yang, Haozhi Ao, Fangxin Yu, Yongqiang Zhou, Jianyi Cheng, Linnian Zhang, Jian Zhou, Jiaqiang Ding","doi":"10.1016/j.jallcom.2025.184502","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184502","url":null,"abstract":"This study investigates the effects of 0.5<!-- --> <!-- -->wt.% Cr on precipitates, texture, recrystallization, and properties in Cu-Ni-Co-Si-Zn alloys. During melting, Cr promotes the formation of (Cr, Co)₃Si primary phases, which contribute to the refinement of the initial grains. The addition of Cr significantly increases the activation energy for second-phase precipitation by 46%, thereby retarding the precipitation kinetics by raising the nucleation energy barrier. However, in the early stage of aging, the co-precipitation of BCC-Cr (three variants) and δ-(Ni, Co, Cr)₂Si results in a multi-phase strengthening effect, markedly enhancing the peak hardness. Cr promotes the transformation of δ-(Ni, Co)₂Si into the more stable δ-(Ni, Co, Cr)₂Si phase and induces the precipitation of fully coherent β-(Ni, Co)₃Si, significantly delaying over-aging and enhancing hardness retention. The formation enthalpies of δ-(Ni, Co, Cr)₂Si and β-(Ni, Co)₃Si are lower than those of δ-(Ni, Co)₂Si and β-Ni₃Si, indicating that the Cr-containing precipitates exhibit stronger thermodynamic driving force and higher structural stability after overcoming the precipitation activation energy. The effect of Cr on grain exhibits a pronounced time-dependent behavior: during short-term aging (2<!-- --> <!-- -->h), Cr suppresses the precipitation of secondary phases, thereby increasing lattice distortion (KAM value increases by 3.4%), promoting the formation of Cube recrystallization texture (1.82), and weakening the Brass texture (from 5.89 to 4.29). After prolonged aging (20<!-- --> <!-- -->h), the 0.5Cr alloy retains a high precipitate density through suppressed coarsening, strengthening grain boundary pinning. As a result, the Brass texture (1.92) is retained, and the recrystallization fraction (2.0%) remains significantly lower than that of the 0Cr alloy (23.6%), ultimately leading to a mixed microstructure composed of recrystallization textures (Rt-C: 1.70, R: 2.43) and deformation textures inherited from cold rolling.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"15 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314734","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":"Precursor-driven nucleation and texture control governing resistivity in low-temperature In2O3 films","authors":"Tae-Kyung Kim, Ji-Hyun Gwoen, Ju-Hwan Han, Hae-Dam Kim, Ji Min Kim, Tae-Heon Kim, Sang-Hyun Kim, Ki-Cheol Song, Jin-Seong Park","doi":"10.1016/j.jallcom.2025.184504","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184504","url":null,"abstract":"Achieving low resistivity (ρ) and sufficient carrier mobility (μ) in In₂O₃ thin films deposited by plasma-enhanced atomic layer deposition (PEALD) at ≤ 100 °C remains challenging due to limited crystallinity and grain-boundary scattering. This study demonstrates that precursor-controlled nucleation—rather than film thickness or bulk crystallinity—is the key factor governing carrier mobility and resistivity. Two indium precursors, DIP3 (MeIn(Pr)₂NMe) and DIP4 (InMe₃(THF)), were employed to investigate the growth, structure, and optoelectronic properties of In₂O₃ films 30–100 nm thick. Characterization used grazing-incidence XRD, XPS, spectroscopic ellipsometry, UV–Vis, and van der Pauw Hall measurements.Films grown with DIP3, which exhibits a lower nucleation density, maintained a stable (222)/(400) texture up to 80 nm and achieved ρ = 1.1 × 10⁻³ Ω cm and FoM = 1.5 × 10⁻³ Ω⁻¹ without post-annealing. In contrast, DIP4 films showed an earlier onset of random orientation and a pronounced mobility decline beyond 50 nm, attributed to higher nucleation density. Increasing the number of DIP3 dosing pulses per ALD cycle raised the growth per cycle (GPC) by 0.04 Å/cycle and increased resistivity to 6.8 × 10⁻³ Ω cm, accompanied by a rise in the (411) peak intensity.These results confirm that accelerated nucleation promotes random grain orientation, thereby increasing resistivity and reducing mobility. All films exhibited &gt; 80% transmittance in the visible range. Overall, these findings highlight that reducing resistivity in low-temperature PEALD requires controlling nucleation and crystallographic texture rather than simply increasing film thickness.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"55 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314733","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":"On the formation and evolution dynamics of electron irradiation defects in magnesium using high-voltage electron microscopy","authors":"Sichen Dong, Hui Liu, Xiaoou Yi, Pingping Liu, Kenji Ohkubo, Wentuo Han, Somei Ohnuki, Naoyuki Hashimoto, Farong Wan","doi":"10.1016/j.jallcom.2025.184501","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184501","url":null,"abstract":"Utilizing a high-voltage electron microscope (HVEM), we conducted 1.25 MeV electron irradiations (RT, up to 0.54 dpa) and performed &lt;em&gt;in-situ&lt;/em&gt; observations of defect formation and evolution dynamics in commercial-purity magnesium. The irradiation induced both interstitial and vacancy-type loops. For the prism-foil (&lt;strong&gt;z&lt;/strong&gt; = [1&lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo is=\"true\"&gt;&amp;#x305;&lt;/mo&gt;&lt;/mover&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.317ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -896.2 500.5 997.6\" width=\"1.162ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMAIN-32\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(29,189)\"&gt;&lt;text font-family=\"STIXGeneral,'Arial Unicode MS',serif\" stroke=\"none\" transform=\"scale(55.199) matrix(1 0 0 -1 0 0)\"&gt;̅&lt;/text&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo is=\"true\"&gt;̅&lt;/mo&gt;&lt;/mover&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo is=\"true\"&gt;̅&lt;/mo&gt;&lt;/mover&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt;10]), preferential nucleation and growth of &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mi is=\"true\"&gt;&amp;#x2159;&lt;/mi&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.432ex\" role=\"img\" style=\"vertical-align: -0.582ex;\" viewbox=\"0 -796.9 828 1047.3\" width=\"1.923ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;text font-family=\"STIXGeneral,'Arial Unicode MS',serif\" font-style=\"italic\" stroke=\"none\" transform=\"scale(55.199) matrix(1 0 0 -1 0 0)\"&gt;⅙&lt;/text&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mi is=\"true\"&gt;⅙&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;mi is=\"true\"&gt;⅙&lt;/mi&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt;&lt;&lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mn is=\"true\"&gt;20&lt;/mn&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mo is=\"true\"&gt;&amp;#x305;&lt;/mo&gt;&lt;/mover&gt;&lt;mn is=\"true\"&gt;3&lt;/mn&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; ","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"70 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314737","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":"Facile synthesis of a phosphorus-doped graphene/nickel-cobalt sulfide nanocomposite derived from metal-organic framework as a high-performance electrode material for supercapacitors","authors":"Milad Karami, Sayed Reza Hosseini, Shahram Ghasemi","doi":"10.1016/j.jallcom.2025.184508","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184508","url":null,"abstract":"In this study, a hierarchical phosphorus-doped graphene/NiCo₂S₄ (PGNCS) nanocomposite was rationally engineered as a high-performance electrode material for supercapacitors via a sequential solvothermal–calcination–sulfidation strategy. The design integrates phosphorus-doped graphene (PG) with a bimetallic NiCo-based metal–organic framework (MOF) precursor, synergistically combining high electrical conductivity with abundant and accessible redox-active sites. Comprehensive characterizations-including XRD, BET, FT-IR, Raman, TEM, FE-SEM, and EDS mapping-confirm the successful formation of a porous, well-anchored architecture with uniformly distributed elements. Electrochemical measurements reveal outstanding performance, delivering a high specific capacitance of 1340<!-- --> <!-- -->F<!-- --> <!-- -->g⁻¹ at 1<!-- --> <!-- -->A<!-- --> <!-- -->g⁻¹ (GCD) and 767<!-- --> <!-- -->F<!-- --> <!-- -->g⁻¹ at 5<!-- --> <!-- -->mV<!-- --> <!-- -->s⁻¹ (CV), along with excellent cycling stability (⁓91% capacitance retention after 5000 cycles). The superior charge-storage capability originates from the synergistic interaction between the conductive PG scaffold and the highly active NiCo₂S₄ phase, which together facilitate rapid electron/ion transport and enhance Faradaic utilization. This work highlights PGNCS as a promising and rationally designed electrode material for next-generation energy storage devices.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"102 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314735","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":"Sm3+ doped novel Sr3In2Ge3O12 orange-red emitting phosphor for WLEDs with high color purity and color rendering index","authors":"Xingliao Xu, Changyan Ji, Zhi Huang, Xiuying Tian, Hongxia Peng, Tiebin Wu, Hongping Qiu, Jin Wen, Hua-Tay Lin","doi":"10.1016/j.jallcom.2025.184494","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184494","url":null,"abstract":"To address the limitations of conventional white light emitting diodes (WLEDs), such as insufficient red light components and low color rendering index (<em>R</em>_a), a series of Sm³⁺ doped germanate orange red phosphors Sr_3-<em>x</em>In₂Ge₃O₁₂:<em>x</em>Sm³⁺ (0 ≤ <em>x</em> ≤ 0.14) were synthesized via high-temperature solid-state reaction in this study. The systematic characterizations of their structure and optical properties were performed. The results indicate that all samples belong to the cubic crystal system with space group <em>I</em>a-3d, where Sm³⁺ successfully occupies the [SrO₈] polyhedral sites. XRD refinement and EDS analysis indicate the formation of the target phase Sr₃In₂Ge₃O₁₂:Sm³⁺, with the presence of a small amount of impurity phase. Upon excitation with 404<!-- --> <!-- -->nm near-ultraviolet light, the germanate phosphors exhibited a characteristic orange red emission at 563<!-- --> <!-- -->nm, attributing to the ⁴G_5/2→⁶H_5/2 transition of Sm³⁺. The optimal doping concentration was determined to be <em>x</em> = 0.1, yielding CIE 1931 coordinates of (0.506, 0.491) in the orange-red region with 94.2% color purity. The concentration quenching mechanism is electric dipole-dipole interaction with the critical distance <em>R</em>_c = 17.2<!-- --> <!-- -->Å. The Sr_2.9In₂Ge₃O₁₂:0.1Sm³⁺ exhibits millisecond-level photoluminescence (PL) lifetime and excellent thermal stability, retaining 69% of its room-temperature PL intensity at 250 ℃. WLEDs assembled with this as the orange-red component demonstrate stable electroluminescence (EL), retaining 82% of initial EL intensity after 12<!-- --> <!-- -->hours of continuous operation, with the <em>R</em>_a as high as 90. This study leverages the rigid framework and high ionic compatibility of the germanate host to achieve both high color purity and excellent thermal stability, providing a novel orange red candidate material for high-color-rendering WLEDs.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311543","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":"Advancing Low-Magnetic Concrete: Microstructural and Magnetic Analysis of Raw Materials for Residual Magnetization Control","authors":"Jianguang Xu, Lei Kuang, Yongsheng Li, Yalu Zuo, Xi Guo, Qi Zhang, Li Xi","doi":"10.1016/j.jallcom.2025.184495","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184495","url":null,"abstract":"The escalating demand for low-magnetic building solutions in sensitive experimental facilities and high-precision instrumentation sectors underscores the critical limitations of traditional concrete materials. Traditional reinforced concrete structures primarily introduce residual magnetic interference via two main avenues: ferromagnetic reinforcement materials and iron-containing oxides inherent in cement-based binders. While the former can be substituted with non-ferrous alternatives, a comprehensive characterization of the types of iron oxides and the mechanism of residual magnetization in the latter remains elusive. This study pioneers a multidisciplinary research approach, integrating advanced microstructural and magnetic analysis techniques to establish a quantitative correlation between the composition of concrete raw materials and their magnetic properties. The saturation magnetization, crystal structure, iron valence state, and magnetic hysteresis behavior of samples from various cements, ground granulated blast furnace slag (GGBS), and fly ash were thoroughly evaluated. The results reveal that fly ash raw materials exhibited the highest iron content (3.43%) and saturation magnetization (0.71<!-- --> <!-- -->emu/g), while GGBS raw materials showed the lowest iron content (0.22% Fe) and saturation magnetization (0.16<!-- --> <!-- -->emu/g). Furthermore, magnetic separation effectively reduce residual magnetic fields, with GGBS samples achieving a low residual magnetic environment (remanence as low as 19.7 nT) after magnetization at 30 mT. Microstructural and magnetic analysis of separated magnetic substances indicate that magnetite (Fe₃O₄) and a small amount of maghemite (α-Fe₂O₃) are the primary contributors to magnetic behavior. Notably, the judicious selection of low-iron content concrete raw materials and/or the application of magnetic separation technology can substantially diminish the residual magnetization characteristics of these materials, offering a promising avenue for the formulation of low-magnetic concrete. This study elucidates the source and removal methodologies for the magnetic properties of concrete raw materials, laying a solid foundation for developing low-magnetic building materials tailored for magnetic control environments.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314749","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":"High-temperature oxidation behaviors of Co-50Ni-10Al-6Ta-8Cr superalloy","authors":"Yupeng Zhang, Cuiping Wang, Xiang Yu, Chen Yang, Jinbin Zhang, Shuiyuan Yang, Xingjun Liu","doi":"10.1016/j.jallcom.2025.184492","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184492","url":null,"abstract":"The oxidation behavior of Al and Cr is crucial to the high-temperature oxidation resistance of superalloys. This work investigates the oxidation behavior of Co-50Ni-10Al-6Ta-8Cr alloy in air at 1000°C as a case study, using multi-scale characterization techniques to explore the types of oxides and competiting mechanisms. Experimental results show that the Co-50Ni-10Al-6Ta-8Cr alloy exhibits good oxidation resistance, with weight gain following a parabolic law. After 25<!-- --> <!-- -->hours of oxidation, the oxide film consists of three layers—a (Co, Ni)O layer, an α-Al₂O₃ layer and a τ + γ phase layer. After 200<!-- --> <!-- -->hours of oxidation, the oxide film consists of a (Co, Ni)O layer, a Cr₂O₃ + CrTaO₄ layer, an α-Al₂O₃ + γ layer and an AlN + τ phase layer. It is found that during the initial oxidation stage, the α-Al₂O₃ layer serves as the primary oxidation barrier, whereas in the later stage, the Cr₂O₃ + CrTaO₄ layer exhibits superior oxidation resistance. Moreover, the Cr₂O₃ + CrTaO₄ layer effectively reduces the oxygen partial pressure inside the oxide scale but was unable to suppress the inward diffusion of nitrogen, leading to the formation of AlN.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"36 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311542","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":"Enhanced Acoustic Phonon Scattering via engineering the Interface in MoS₂/CuS Nanocomposites for Ultra-Low Thermal Conductivity","authors":"M. Arockia Jenisha, S. Harish, J. Archana, M. Navaneethan","doi":"10.1016/j.jallcom.2025.184493","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184493","url":null,"abstract":"Significant advancements in power factor are widely realized in bulk thermoelectric materials through strategies such as doping, band engineering, and nanostructuring. We report the first demonstration of simultaneous enhancement of the Seebeck coefficient and electrical conductivity in <em>p</em>-type MoS₂/CuS nanocomposites through precise compositional tuning that activates a strong energy filtering effect. Leveraging the phonon liquid electron crystal (PLEC) nature of CuS, our approach delivers synergistic optimization of charge and phonon transport. The optimized 20<!-- --> <!-- -->wt% CuS composite achieves a high electrical conductivity of 893 Scm^-1 and a power factor of 41 μWm^-1K^-2 at 653<!-- --> <!-- -->K, attributed to increased Cu²⁺ ion concentration and a high density of states near the Fermi level (~0.2<!-- --> <!-- -->eV) enabled by band structure modulation. At the same temperature, the material also exhibits an ultra-low thermal conductivity of 0.2 Wm^-1K^-1 due to intensified acoustic and interfacial phonon scattering. This synergistic control of electronic and thermal transport represents a novel strategy for mid-temperature thermoelectric materials design, positioning MoS₂/CuS nanocomposites as promising candidates for next-generation power generation systems.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"10 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311605","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}