Bulletin of Materials Science最新文献

{"title":"Thermodynamic and kinetic analysis of Ti30V60Mn3.3Cr6.6 BCC alloy added with Zr–Ni-based additives for hydrogen storage","authors":"Firdos Jahan Khan,&nbsp;Amol Kamble,&nbsp;Asheesh Kumar,&nbsp;Seemita Banerjee","doi":"10.1007/s12034-026-03747-9","DOIUrl":"10.1007/s12034-026-03747-9","url":null,"abstract":"<div><p>This study investigates the effect of Zr and Ni additions on the hydrogen storage properties of the Ti₃₀V₆₀Mn_3.3Cr_6.6 alloy. Alloys containing different additives (4% Zr, 1% Zr + 3% Ni, and 4% Ni) were synthesized by arc melting. Their composition, crystal structure, and hydrogen storage performance were systematically characterized using energy-dispersive X-ray spectroscopy (EDX), pressure–composition isotherm (PCI) measurements, X-ray diffraction (XRD), kinetic analysis, and temperature-programmed desorption (TPD). The alloy containing 4% Zr exhibited the highest hydrogen absorption capacity of 3.82 wt.% at room temperature, whereas the addition of 4% Ni resulted in the fastest intrinsic absorption kinetics. Van’t Hoff analysis yielded an average enthalpy change of − 58.83 ± 1.18 kJ/mol and an average entropy change of − 164.48 ± 4.11 J/(mol K). XRD patterns of the desorbed samples after the third hydrogenation/dehydrogenation cycle revealed the presence of a body-centered tetragonal (BCT) phase in addition to the primary body-centered cubic (BCC) phase for the Ni-containing alloys, indicating the persistence of a stable residual hydride phase. The alloys containing 4% Zr, 1% Zr + 3% Ni, and 4% Ni achieved 85.2%, 97.8%, and 95.3% of their gravimetric hydrogen storage capacities, respectively, within the first 2.75 min of hydrogenation. Kinetic analysis indicated that hydrogen absorption is governed by diffusion through the hydride layer together with nucleation and growth at grain boundaries. TPD analysis showed desorption peaks at higher temperatures for the 1% Zr + 3% Ni and 4% Ni alloys, indicating the formation of more stable hydride phases. These observations are consistent with the thermodynamic analysis, which showed higher enthalpy changes for these alloys.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field-induced magnetic phase transition and thermomagnetic irreversibility in co-doped Mn1.9Cr0.1SbBx compounds (x = 0.25 and 1.0)","authors":"Jai Dev,&nbsp;Surinder Pal Singh,&nbsp;Pallavi Kushwaha","doi":"10.1007/s12034-026-03754-w","DOIUrl":"10.1007/s12034-026-03754-w","url":null,"abstract":"<div><p>We investigate the magnetic and magnetotransport properties of Mn_1.9Cr_0.1SbB_x (<i>x</i> = 0.25 and 1.0), synthesized through combined substitutional (Cr) and interstitial (B) co-doping. The introduction of B strongly modifies the magnetic phase stability and tunes the field-induced first-order magnetic phase transition. Both compositions exhibit a field-driven ferrimagnetic-to-antiferromagnetic transition accompanied by pronounced thermomagnetic irreversibility. The MR(<i>H</i>) response shows clear hysteresis, with anomalous virgin-curve behavior and the emergence of open loops near the transition temperatures, indicating metastability, phase coexistence, and kinetic arrest. A sizable negative magnetoresistance is observed near the transition region (~32% at 200 K for <i>x</i> = 0.25 and ~13% at 100 K for <i>x</i> = 1.0), arising from the field-induced phase transformation and spin-dependent scattering. The strength of the irreversibility and the MR is found to be highly sensitive to the B concentration, demonstrating the effectiveness of interstitial tuning in controlling phase competition and magnetotransport in Mn₂Sb-based systems.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Processing–structure–property correlations in cold-drawn Cu–Nb single-filamentary micro-composite wires","authors":"Goutam Kumar Majhi,&nbsp;Abhinav Arya","doi":"10.1007/s12034-026-03716-2","DOIUrl":"10.1007/s12034-026-03716-2","url":null,"abstract":"<div><p>Single-filamentary microcomposite wires of Cu–Nb were produced by room temperature wire drawing. Microstructural characterization by electron backscattering diffraction (EBSD) of highly deformed copper and niobium phases shows strong &lt;111&gt; and &lt;110&gt; textures along the wire-drawing axis, respectively. The mechanical strength of the composite wires increased with wire drawing strain, without any significant change in ductility. Resistivity measurements by the four-probe technique at 77 K also showed a similar trend to that of mechanical strength. Annealing of drawn 100 µm Cu–Nb composite wire between 573 and 973 K resulted in improved ductility with decreased strength as the copper grain size increased. The dependence of yield strength on copper grain size in the composite wire was in accord with the Hall–Petch relationship. The nano-hardness value of the individual phase shows minimal change in hardness at various regions of the composite. There is a sudden increase in hardness as we move across the Cu–Nb interface.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First-principles study of the structural, magnetic, thermodynamic, and mechanical properties of Fe2CoGa Heusler alloy","authors":"Salima Labidi,&nbsp;Ahmad Hakamy,&nbsp;Rachid Masrour","doi":"10.1007/s12034-026-03652-1","DOIUrl":"10.1007/s12034-026-03652-1","url":null,"abstract":"<div><p>In this study, the structural, electronic, magnetic, thermodynamic, and mechanical properties of the Fe₂CoGa full Heusler alloy are investigated using density functional theory (DFT) within the generalized gradient approximation (GGA-08). The optimal structural parameters were obtained by minimizing the total energy as a function of volume for both the regular (Fm-3m) and inverse (F-43m) structures, thereby identifying the most stable phase. Additionally, the modified Becke–Johnson potential (mBJ-GGA) was employed to calculate the electronic band structure and density of states, providing further insights into the material's electronic behavior. Magnetically, Fe₂CoGa exhibits a total magnetic moment of 5.59 μ_B, in close agreement with experimental and previous theoretical values. The Fe atoms contribute the most to magnetization due to their unpaired 3d electrons, while Ga shows a small negative moment, indicating antiparallel alignment. The Curie temperature was estimated at 1034.79 K using an empirical relation. Thermodynamic properties were evaluated via the quasi-harmonic Debye model. Volume increases with temperature and decreases with pressure, while bulk modulus and Debye temperature show inverse temperature dependence and increase with pressure. Heat capacity follows <i>T</i>³ behavior at low temperatures and reaches the Dulong–Petit limit at higher temperatures, with minor pressure dependence. Mechanical properties, derived from elastic constants via the energy-strain method, show that Fe₂CoGa is mechanically stable, ductile (<i>B</i>/<i>G</i> &gt; 1.75), and exhibits high stiffness (<i>E</i> = 202.03 GPa), bulk modulus (232.62 GPa), and shear modulus (273.9 GPa). A Poisson’s ratio of 0.303 confirms its metallic character, and an anisotropy factor &gt;1 suggests moderate elastic anisotropy. The results align well with prior theoretical and experimental data, confirming Fe₂CoGa’s potential for structural and magnetic applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chitosan-based nanoplatforms for biomedical theranostics: Recent advances in design, functionalization, and applications","authors":"Swati Rani,&nbsp;Shubham Sharma,&nbsp;Nutan Rani,&nbsp;Kalawati Saini,&nbsp;Dipak Maity","doi":"10.1007/s12034-026-03700-w","DOIUrl":"10.1007/s12034-026-03700-w","url":null,"abstract":"<div><p>Chitosan, the second most abundant natural polysaccharide derived from chitin, has attracted considerable attention owing to its excellent biocompatibility, biodegradability, and versatile chemical functionality. These unique properties make chitosan an exceptional platform for a broad range of biomedical applications, including drug and gene delivery, cell encapsulation, bioimaging, tissue engineering, wound healing, and antimicrobial therapies. In particular, the favorable physicochemical and biological properties of chitosan-based nanosystems have enabled their development as advanced and efficient drug delivery vehicles. This review comprehensively examines recent advances in the synthesis, surface modification, and functionalization strategies employed to enhance the therapeutic efficacy, targeting specificity, and multifunctionality of chitosan-based nanoplatforms for theranostic applications. Particular emphasis is placed on their roles in targeted drug delivery, controlled and sustained drug release, and stimuli-responsive behavior for the treatment of cancer, infectious diseases, and neurological disorders. Furthermore, the integration of diagnostic modalities, including fluorescence imaging, magnetic resonance imaging, and biosensing, highlights the growing potential of chitosan-based nanostructures as next-generation theranostic platforms.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of cerium substitution on the structure and electrochemical performance of La1-yCeyFe0.8Ni0.2O3 (y = 0, 0.5) perovskites for Ni-MH battery electrodes","authors":"Ahmed Khedimallah,&nbsp;Wissem Zayani,&nbsp;Chokri Khaldi,&nbsp;Jilani Lamloumi,&nbsp;Omar El-Kedim,&nbsp;Nouredine Fenineche","doi":"10.1007/s12034-026-03664-x","DOIUrl":"10.1007/s12034-026-03664-x","url":null,"abstract":"<div><p>Perovskite-type oxides La_1-yCe_yFe_0.8Ni_0.2O₃ (y = 0, 0.5) were synthesized by the Pechini sol–gel method to investigate the effect of Ce substitution on its structural and electrochemical properties. The Rietveld and Williamson–Hall analyses revealed that Ce incorporation induces lattice expansion, increases microstrain and formation of secondary phases (La₂O₃ and Ce₇Ni₃), indicating the limited solubility of Ce in the LaFeO₃ lattice. The average crystallite size increases from 26 to 66 nm accompanied by an increase in microstrain from 1.1×10⁻³ to 1.85×10⁻³, reflecting partial grain coalescence and enhanced lattice distortion. Electrochemical results shows that La_0.5Ce_0.5Fe_0.8Ni_0.2O₃ exhibits a higher discharge capacity (272 mAh g⁻¹) and improved cycling stability (~30% retention) compared to LaFe_0.8Ni_0.2O₃ (189 mAh g⁻¹, 10%). These enhancements are a result of Ce³⁺/Ce⁴⁺ redox activity, oxygen-vacancy formation and improved charge-transfer kinetics.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Micro-structural, magnetic memory effect studies in nickel ferrite nanoparticles synthesized using a facile synthesis","authors":"Annrose Sunny,&nbsp;Kasarapu Venkataramana,&nbsp;Y Ranjith Kumar,&nbsp;M Vasundhara","doi":"10.1007/s12034-026-03682-9","DOIUrl":"10.1007/s12034-026-03682-9","url":null,"abstract":"<div><p>NiFe₂O₄ nanoparticles were synthesized via an eco-friendly egg-white-assisted combustion route and systematically investigated their structural, electronic, and magnetic properties, with particular emphasis on magnetic memory behavior. X-ray diffraction with Rietveld refinement confirmed the formation of a single-phase structure (space group <i>Fd</i>-3<i>m</i>). Transmission electron microscopy revealed predominantly hexagonal-shaped particles with an average size of ~35 nm. X-ray photoelectron spectroscopy and Mössbauer spectroscopy established the inverse spinel nature of NiFe₂O₄, with preferential occupation of Ni²⁺ ions at octahedral sites and Fe³⁺ ions distributed over both tetrahedral and octahedral sites. The hyperfine parameters obtained from Mössbauer analysis further confirmed a well-ordered magnetic structure. Temperature-dependent magnetization measurements revealed ferrimagnetic ordering with a Curie temperature of ~892 K, exceeding that of bulk and suggesting enhanced exchange interactions at the nanoscale. Field-dependent magnetization measurements showed finite coercivity, ruling out ideal superparamagnetic behavior. Remarkably, clear magnetic memory effects were observed between 2 and 400 K under field-cooling protocols, indicating slow spin dynamics and magnetic relaxation phenomena associated with interparticle interactions and magnetic anisotropy. The findings demonstrate that egg-white-synthesized NiFe₂O₄ nanoparticles exhibit stable ferrimagnetism, inverse spinel cation distribution, and intrinsic magnetic memory behavior, making them promising candidates for multifunctional magnetic and spintronic applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface-engineered 3D nano-heterojunction thin films (α-Fe2O3/NaNbO3/Ag nanoparticles) for efficient photoelectrochemical water splitting","authors":"Bhanupriya,&nbsp;Kumari Ruchi,&nbsp;Shubhangi Gautam,&nbsp;Rohit Shrivastav","doi":"10.1007/s12034-026-03758-6","DOIUrl":"10.1007/s12034-026-03758-6","url":null,"abstract":"<div><p>Three-dimensional nano-heterojunction (n/n-type) thin films (α-Fe₂O₃/NaNbO₃/Ag nanoparticles) were synthesized and evaluated as photoanodes for the photoelectrochemical (PEC) splitting of water. The unique nanoarchitecture, featuring type-II band alignment, facilitated the rapid separation and migration of photogenerated charge carriers. The synergistic contribution of the two oxides, coupled with the surface plasmon resonance of Ag nanoparticles, led to enhanced light absorption and a significant red shift in the absorption threshold. The study highlights that the morphology and crystallite size of the Ag nanoparticles, prepared through the controlled aqueous-phase reduction of AgNO₃ using banana peel extract, varied with the reaction time, which had a significant effect on the PEC response of the prepared thin films. XRD, AFM, FESEM, EDAX, XPS, and Mott–Schottky analyses indicated possible linkages between the sample microstructure and the photocurrent. The favorable microstructural modifications and interface engineering in the nano-heterojunction thin films yielded the highest photocurrent of 2.4 mA cm⁻² and an applied bias photon-to-current efficiency of 0.72% (at 1 V vs. SCE), nearly two orders of magnitude higher than that of pristine α-Fe₂O₃. A plausible mechanism for the observed enhancement in PEC performance and the flow of charge carriers in the studied PEC system is proposed.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Piezoelectric effect in Na0.5Bi0.5TiO3−xZnO ceramics for water treatment","authors":"Mohit Singhal,&nbsp;Aditya Gaur,&nbsp;Dhiraj Kumar Singh,&nbsp;Satyanarayan Patel","doi":"10.1007/s12034-026-03733-1","DOIUrl":"10.1007/s12034-026-03733-1","url":null,"abstract":"<div><p>The present study investigates the piezocatalytic performance of Zn-doped Na_0.5Bi_0.5TiO₃ (NBT–xZn; <i>x</i> = 0, 0.5%, 1%, 1.5%, and 2%) for the degradation of Rhodamine B (RhB) dye in wastewater. The highest dye degradation efficiency of 90% was achieved with NBT–0.01Zn after 120 min. The effects of dye concentration (2.5, 5, 7.5, and 10 mg/L), catalyst dosage (0.5, 1, and 2 g/L), poling, and different extraction times to simulate practical operating conditions were also investigated. Radical-trapping experiments, including scavenger and fluorescence tests, were performed to confirm the generation of reactive species during the degradation process. These results demonstrate that NBT–0.01Zn is an optimized lead-free piezocatalyst with high piezoelectric efficiency, excellent operational stability, and good repeatability, making it a promising candidate for sustainable wastewater treatment applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase formation in ALD Hf1–xTixO2 and Zr1–xTixO2 films from amorphous to crystalline solid solutions","authors":"Eugene A Khizhnyak,&nbsp;Vladimir R Shayapov,&nbsp;Anastasiya D Fedorenko,&nbsp;Ilya V Korolkov,&nbsp;Sergei V Goryainov,&nbsp;Eugene A Maximovskiy,&nbsp;Mikhail S Lebedev","doi":"10.1007/s12034-026-03653-0","DOIUrl":"10.1007/s12034-026-03653-0","url":null,"abstract":"<div><p>The phase formation in the Hf_1–<i>x</i>Ti_<i>x</i>O₂ and Zr_1–<i>x</i>Ti_<i>x</i>O₂ (<i>x</i> = 0–1) thin films obtained by atomic layer deposition has been systematically investigated. The elemental composition, long-range order, and short-range atomic structure of the as-deposited and vacuum-annealed (700–900°C) films were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, Raman and IR spectroscopy. The results show that the crystallization behavior is highly dependent on the Ti content (<i>x</i>) and post-deposition annealing. As-deposited films are predominantly amorphous for 0.13 &lt; <i>x</i> &lt; 0.875, while binary and lightly alloyed oxides (<i>x</i> ≈ 0 or <i>x</i> ≈ 1) are polycrystalline. Annealing induces crystallization into distinct phase regions: solid solutions based on HfO₂ or ZrO₂ phases at low <i>x</i>, orthorhombic HfTiO₄ or ZrTiO₄ titanates at intermediate <i>x</i> = 0.25–0.5, mixtures of titanates with TiO₂ phases at <i>x</i> = 0.67–0.75 and anatase-based solid solutions at higher <i>x</i>. IR spectroscopy demonstrates the presence of the bands characteristic of TiO₂ phases (anatase, rutile) across a wide concentration range. This study elucidates the non-equilibrium phase evolution in ALD-grown Hf–Ti–O and Zr–Ti–O films, highlighting the critical influence of composition and thermal treatment on the resulting structure.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}