Journal of Alloys and Compounds最新文献

{"title":"Solid-State Synthesis of Cr2AlC MAX Phase from Mechanically Activated Cr/Al/C Powder Blends","authors":"Berk Şenyurt, Duygu Ağaoğulları, Nazl Akçamlı","doi":"10.1016/j.jallcom.2025.180449","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180449","url":null,"abstract":"This study focuses on synthesizing the ternary-layered chromium aluminum carbide phase (Cr₂AlC MAX) via a milling-assisted solid-state synthesis method. The elemental powders of Cr, Al, and C were processed in a two-stage process following mechanical activation (MAc) and annealing. Various parameters in both stages (such as milling time, annealing temperature, and using a process control agent) were examined to optimize the production of a high-purity Cr₂AlC MAX phase. For this purpose, the elemental powders underwent MAc through high-energy ball milling for 1, 3, and 5<!-- --> <!-- -->hours and annealing at temperatures ranging from 700 to 1500 °C. The formation mechanism of the Cr₂AlC phase was discussed based on detailed characterizations, including differential thermal calorimetry (DSC), X-ray diffraction (XRD), and Rietveld analyses. Additionally, the morphological properties of the synthesized powders were investigated in detail via scanning and transmission electron microscopy (SEM and TEM) techniques. The initial formation of the MAX phase was observed at 700 °C, and it was completed with a meager amount of chromium carbide phase at higher temperatures (99.7% Cr₂AlC at 1100 °C) depending on the synthesis conditions. In addition, a single-phase Cr₂AlC MAX without a carbide impurity was achieved with the addition of SA, which caused an increase in the annealing temperature to 1300 °C.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"21 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831861","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":"Ferroelectric and piezoelectric enhancement in lead-free NaNbO₃–BiErKZrO₃ perovskite ceramics: Tetragonal phase stability and optical properties","authors":"P. Elaiyaraja ,&nbsp;N. Karunagaran ,&nbsp;M. Muralidharan","doi":"10.1016/j.jallcom.2025.180456","DOIUrl":"10.1016/j.jallcom.2025.180456","url":null,"abstract":"<div><div>Lead-free (1-x)NaNbO₃-xBiErKZrO₃ (x = 0.01, 0.02, 0.03, and 0.04 mol%) ceramics were synthesized using a three-step solid-state sintering method, exhibiting a stable tetragonal perovskite structure (P4/mbm), as confirmed by X-ray diffraction (XRD) and Rietveld refinement. Raman spectroscopy verified the presence of NbO₆ octahedral vibrational modes, ensuring structural stability. Microstructural analysis via FE-SEM and HR-TEM revealed homogeneously distributed grains with low defect concentrations, contributing to enhanced densification and electrical uniformity. The optical characterization demonstrated a tunable bandgap between 3.21 and 3.27 eV, making these ceramics suitable for optoelectronic applications. Photoluminescence (PL) spectra exhibited intense emissions at 597 and 640 nm, with a high color purity of 85 % and a correlated color temperature (CCT) of 2088 K, indicating potential for display and lighting technologies. Dielectric studies revealed a broad ferroelectric-to-paraelectric transition occurring between 120°C and 250°C, with strong frequency-dependent permittivity. Ferroelectric analysis indicated that the x = 0.02 composition achieved optimal performance, with a remanent polarization (Pᵣ) of 4.9378 μC/cm² and a dielectric energy density of 12.3445 μJ/cm³ , suggesting its potential for high-energy storage applications. Piezoelectric measurements showed enhanced properties at x = 0.03, where the piezoelectric coefficients d₃₃, d₃₂, and d₃₁ were recorded as 156, 144, and 143 pC/N, respectively. The voltage coefficient (g₃₃) reached 69.032 × 10⁻¹ ⁵ V·m/N, and the figure of merit (d₃₃ × g₃₃) was calculated as 10.7680 × 10⁻³ ⁰ J/m³ . Mechanical stability was supported by a mechanical quality factor (Qₘ) of 20 and an acoustic impedance of approximately 24,600 kg/m²s. These findings highlight the multifunctionality of (1-x)NaNbO₃-xBiErKZrO₃ ceramics, demonstrating their suitability for advanced applications in energy storage, piezoelectric transducers, optoelectronic devices, and next-generation microelectronic components.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1026 ","pages":"Article 180456"},"PeriodicalIF":5.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833046","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":"Microstructure evolution and mechanical property of TiCp/Ti6Al4V composites manufactured using laser metal deposition assisted by synchronous ultrasonic impact treatment","authors":"De Xu ,&nbsp;Zubin Chen ,&nbsp;Chunhuan Guo ,&nbsp;Wei Chen ,&nbsp;Fengchun Jiang ,&nbsp;Huaguo Tang ,&nbsp;Yunxiang Tong","doi":"10.1016/j.jallcom.2025.180448","DOIUrl":"10.1016/j.jallcom.2025.180448","url":null,"abstract":"<div><div>In this work, synchronous ultrasonic impact treatment (UIT) is proposed to regulate the microstructure and enhance the mechanical property of TiC_p/Ti6Al4V composites prepared by laser metal deposition (LMD). The results showed that the columnar to equiaxed transition (CET) of prior β-Ti was completed under the effect of UIT with a grain size reduction of approximately 47.27 %. The α-Ti grains were refined and their preferred orientation was significantly weakened. Furthermore, UIT promoted the isotropic growth of in-situ TiC, and the rod-like TiC was replaced by granular TiC. Compared with the LMD sample, the TiC in the LMD-UIT sample exhibited a higher carbon content and a growth orientation along the α-Ti close-packed directions. The orientation relation of [<span><math><mrow><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover><mn>2</mn><mover><mrow><mn>3</mn></mrow><mo>̅</mo></mover></mrow></math></span>]_α-Ti // [<span><math><mrow><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover><mn>0</mn></mrow></math></span>]_TiC, (1<span><math><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover></math></span>00)_α-Ti // (1<span><math><mrow><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover></mrow></math></span>)_TiC for the LMD sample transformed to [<span><math><mrow><mn>10</mn><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover><mn>0</mn></mrow></math></span>]_α-Ti // [<span><math><mrow><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover><mn>0</mn></mrow></math></span>]_TiC, (0002)_α-Ti // (11<span><math><mover><mrow><mn>1</mn></mrow><mo>̅</mo></mover></math></span>)_TiC for the LMD-UIT sample, the α-Ti/TiC interface in both samples was semi-coherent with low strain energy. The contribution values of grain refinement strengthening, dislocation strengthening and TiC precipitation phase strengthening were calculated as 44 MPa, 5 MPa and 2.1 MPa, respectively, among these, grain boundary strengthening was the dominant factor affecting the mechanical property of TiC_p/Ti6Al4V composites, meanwhile, uniform plastic deformability by randomly oriented grains and the relief of localized stress concentration by granular TiC were also beneficial to enhance the plasticity of composites. The excellent yield strength, ultimate tensile strength, and elongation of the LMD-UIT samples were 1079 MPa, 1134 MPa, and 3.3 %, with an increased ratio of 8 %, 6 %, and 32 %, respectively. This work offers a novel approach for refining the microstructure and enhancing mechanical property of TiC_p/Ti6Al4V composites using ultrasonic impact treatment assisted laser metal deposition.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1026 ","pages":"Article 180448"},"PeriodicalIF":5.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833052","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 RuO2/CoOOH heterojunction for efficient oxygen evolution reaction","authors":"Xian-Jun Niu ,&nbsp;Yin-Lei Ma ,&nbsp;Jun-Ya Gao ,&nbsp;Zhi-Hua Lu ,&nbsp;Ji-Sen Li","doi":"10.1016/j.jallcom.2025.180409","DOIUrl":"10.1016/j.jallcom.2025.180409","url":null,"abstract":"<div><div>Rational design and construction of low-cost and efficient catalysts with robust structures are significant toward oxygen evolution reaction (OER), but their scalable synthesis remains a grand challenge. Herein, we report a combustion-assisted strategy for in situ growth of a RuO₂/CoOOH heterojunction on cobalt foam, which can serve as both metal source and catalyst support. This simple route is favorable to large-scale industrial applications for hydrogen production in the future. Due to the synergistic effect of catalytically active phases, abundant heterointerfaces, and 3D porous structures, the targeted catalyst shows outstanding catalytic OER performance with a lower overpotential of 190 mV to reach a current density of 10 mA cm⁻², smaller Tafel slope of 47.5 mV dec⁻¹, and long-term durability for 50 h in 1.0 M KOH solution. When assembled as the anode toward full water splitting, the electrolyzer is capable of offering 10 mA cm⁻² at a cell voltage of 1.47 V along with remarkable operational stability. Moreover, the device can be powered by a 1.5 V AA battery, wind, and solar energies, respectively. This work offers a feasible, rapid, and scalable approach for fabricating efficient robust catalysts for oxygen electrocatalysis.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1025 ","pages":"Article 180409"},"PeriodicalIF":5.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825396","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 High-Efficiency, Stable Lead-Free 2D Dion-Jacobson/3D Perovskite Solar Cells with Minimized Non-Radiative Losses","authors":"Hichem Bencherif, Qoteyba Aouni, Mohammad. S. AlSalhi, Sandhanasamy Devanesan, Okba Mohamed Cherif, P. Sasikumar","doi":"10.1016/j.jallcom.2025.180401","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180401","url":null,"abstract":"This study introduces a novel design for FASnI₃ solar cells integrating a 2D Dion-Jacobson (DJ) layer as an interfacial layer to enhance performance. Using the Detailed Balance principle, photoluminescence quantum yield (<em>PLQY</em>) and quasi-Fermi level splitting (<em>QFLS</em>) were optimized. The study investigates the impact of varying the number of 2D DJ layers, revealing that while increasing the layers improves metrics like <em>J</em>_<em>SC</em> and <em>V</em>_<em>OC</em>, as well it increases series resistance., reducing the fill factor (<em>FF</em>). The 2D DJ layer's quantum confinement impact reduces the bandgap (<em>Eg</em>), enhancing charge generation and carrier dynamics, which boosts <em>J</em>_<em>SC</em> and <em>V</em>_<em>OC</em>. Additionally, the 2D DJ layer mitigates interface defects between the absorber and the ETL. The optimal configuration, a single 2D DJ layer with Ga₂O₃ as the ETL, achieved a <em>PCE</em> of 18.16%, representing an 61.5% improvement over conventional designs. This design balances efficiency, stability, and environmental sustainability, providing a capable solution for high-performance lead-free solar cells.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"27 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143827576","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 the microstructure-property relationships of additively manufactured Ti-Ta bimetal composites","authors":"Weilin Yu, Huiwang Yu, Yu Guo, Ying Zhang, Yang Liu, Yong Yang, Qiangbin Wang, Zhentao Yu, Baisong Guo","doi":"10.1016/j.jallcom.2025.180439","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180439","url":null,"abstract":"Ti-based composites with excellent multiple properties are highly required for surgical implant applications. Herein, we developed the Ti-Ta bimetal composites by the Electron Beam Powder Bed Fusion (EB-PBF) with the regulation of the scanning speed of the electron beam. It can be found that the metallurgical interface bonding can be formed between the Ti matrix and residual Ta particles in the Ti-Ta bimetal composites, and the application of the highest scanning speed of the electron beam (0.700<!-- --> <!-- -->m/s) facilitates the achievement of the higher yield strength but slightly lower ductility than the other two composites fabricated under the lower scanning speed of electron beam. The strength enhancement of the Ti-Ta bimetal composites mainly derives from grain refinement and solid solution strengthening, and the contribution of load transfer strengthening, dislocation strengthening, and Orowan strengthening also takes roles to some extent. The higher ductility of the composites fabricated with lower scanning speed of the electron beam (0.600<!-- --> <!-- -->m/s and 0.675<!-- --> <!-- -->m/s) mostly derives from the stronger interfacial bonding between residual Ta particles and Ti matrix and lower dislocation density in the interfacial area. In addition, compared to Ti6Al4V, the Ti-Ta bimetal composites have comparable wear resistance and better corrosion resistance, and in vitro biocompatibility. The findings pave the new route for developing the Ti-based composites with the desired multiple properties for surgical implants.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"60 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831957","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":"Flower-Sphere CoNiCuMnFe/C High-Entropy Alloy Catalysts for Enhanced Oxygen Evolution Reaction Kinetics","authors":"Zhan-zhan Wang, Kai-xu Gao, Xiao Yan, Min Wang, Sheng-nv Xu, Jun-hui Cai, Kai Zhu, Yan-juan Li","doi":"10.1016/j.jallcom.2025.180421","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180421","url":null,"abstract":"The sluggish kinetics of the oxygen evolution reaction (OER) remain a significant bottleneck in the development of anodic water electrolysis technologies. High-entropy alloys (HEAs) have emerged as promising candidate catalysts for OER due to their versatile composition, which allows for the fine-tuning of electronic structures and catalytic active sites. In this study, we synthesize a flower-sphere-like HEA/C electrocatalyst via a molten salt method, with compositional control of CoNiCuMnM [M = IIA, I-IXB, and VIII (s, d²-d¹⁰)]. Among the compositions evaluated, CoNiCuMnFe/C exhibits superior catalytic performance, achieving an overpotential of 350<!-- --> <!-- -->mV at 10<!-- --> <!-- -->mA<!-- --> <!-- -->cm⁻² and a Tafel slope as low as 79<!-- --> <!-- -->mV dec⁻¹. Density functional theory (DFT) calculations indicate that the strong intermetallic interactions within specific regions of the HEA enhance electron transfer across different metal sites. The d-band center of Fe is located at a deeper energy relative to the Fermi level (E_F), which indirectly boosts the OER catalytic activity. Ni and Mn, positioned closer to E_F, facilitate electron transfer, while their broader electronic energy levels enhance conductivity. This synergistic effect, particularly pronounced at Cu sites, improves OH* adsorption on the CoNiCuMnFe/C surface, significantly enhancing OER catalysis.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"43 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143827589","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":"Improving MoS2 hydrogen evolution performance in anion exchange membrane water electrolysis by using LaNi5 alloy as a co-catalyst","authors":"Hao Shang ,&nbsp;Hang Shi ,&nbsp;Haoliang Yu ,&nbsp;Xiaohong Hu ,&nbsp;Yan Xia","doi":"10.1016/j.jallcom.2025.180420","DOIUrl":"10.1016/j.jallcom.2025.180420","url":null,"abstract":"<div><div>To develop high-performance non-precious metal hydrogen evolution reaction HER catalysts for anion exchange membrane water electrolysis (AEMWE) and address the issue of the rate of Volmer step in HER being limited by H₂O dissociation in alkaline media, we propose a strategy where LaNi₅ alloy is used as a co-catalyst for the adsorption and activation of H*, thereby accelerating the rate of the HER. We find that LaNi₅ has a significant HER synergistic effect with MoS₂. The overpotential at 10 mA·cm⁻¹ for HER catalyzed by the LaNi₅-MoS₂ composite catalyst is only 143 mV in 1.0 M KOH solution, and the AEMWE using LaNi₅-MoS₂ as cathode catalyst reaches 1.966 V at 1.0 A·cm⁻² and shows a low degradation. Mechanism studies suggest that LaNi₅ plays the role of adsorbing and activating H*, and the enriched H* from LaNi₅ overflows to MoS₂, which has good H₂ desorption sites, resulting in improved HER kinetics of LaNi₅-MoS₂.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1025 ","pages":"Article 180420"},"PeriodicalIF":5.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829445","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":"Mechanical properties of Cu-Ni alloy thick films electrodeposited from aqueous solution containing pyrophosphate as a complexing agent","authors":"Ryuji Hashiguchi ,&nbsp;Masamitsu Hayashida ,&nbsp;Takeshi Ohgai","doi":"10.1016/j.jallcom.2025.180398","DOIUrl":"10.1016/j.jallcom.2025.180398","url":null,"abstract":"<div><div>Cu-Ni alloy thick films with a thickness of approximately 170 µm were electrodeposited from an aqueous solution containing pyrophosphate as a complexing agent. The electrodeposited Cu-Ni alloy thick films with a dumbbell shape were exfoliated from a metallic titanium cathode to examine the crystal orientation, microhardness and tensile strength. The average crystallite size of electrodeposited Cu-Ni alloy thick films was around 30 nm. The microhardness increased up to 327 HV with increasing the Ni content up to ∼19 % while the maximum tensile strength reached 726 MPa at the Ni content of ∼13 %. The improvement of these mechanical properties can be explained by two strengthening mechanisms of solid solution alloying and crystallite size refining.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1026 ","pages":"Article 180398"},"PeriodicalIF":5.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143827586","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":"Alternative Plasmonic Ti-Doped HfN Thin Films by Reactive Co-Magnetron Sputtering and their SERS Performances","authors":"Nutdanai Bodinthitikul, Tossaporn Lertvanithphol, Mati Horprathum, Tanapoj Chaikeeree, Hideki Nakajima, Suchanya Milawan, Wuttichai Phae-ngam, Tula Jutarosaga","doi":"10.1016/j.jallcom.2025.180430","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180430","url":null,"abstract":"Titanium-doped hafnium nitride (Ti-doped HfN) thin films were developed as an alternative surface-enhanced Raman scattering (SERS) substrate using a reactive dual-cathode DC unbalanced magnetron co-sputtering system. The thin films were deposited on (100) silicon wafers with the Ti doping concentration varied by adjusting the DC current of the Ti target. Each physical property was characterized using field-emission scanning electron microscopy, atomic force microscopy, energy-dispersive X-ray spectroscopy, grazing-incidence X-ray diffractometry, near-edge X-ray absorption spectroscopy, spectroscopic ellipsometry, and confocal Raman spectroscopy. Approximately 7.3 at% of Ti atoms were well incorporated into the cubic HfN nano-films, allowing variation in N content. The impact of Ti doping and %N/(%Ti + %Hf) on physical structures, crystal structures, electronic properties, optical properties, and SERS performances of the N rich thin films was thoroughly investigated. The findings showed that the increase in the %N/(%Ti + %Hf) from 1.5 to 3.0 caused the decrease in thickness, conduction band minimum, quality factor at 785<!-- --> <!-- -->nm, maximum electron loss function peak height and Raman intensity, while it caused the increase in average crystalline size and lattice constant. The plasmonic properties of Ti-doped HfN films were compared with conventional plasmonic materials and binary nitride materials. Additionally, it was confirmed that plasmonic performances could be tuned by changing the chemical composition, notably the %N/(%Ti + %Hf). This research focused on how the chemical composition affects the plasmonic performances and SERS signal in Ti-doped HfN thin films.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"108 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831639","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}