Nanomaterials最新文献_第5页

Regulating Humidity-Dependent Catalyst-Layer Transport by an Ultrathin Carbon Interface for Low-RH PEMFCs. 通过超薄碳界面调节低rh pemfc中湿度依赖的催化剂层传输。

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-13 DOI: 10.3390/nano16201297

Caihan Zhu, Dewei Li, Tao Wu, Yunan Wang

{"title":"Regulating Humidity-Dependent Catalyst-Layer Transport by an Ultrathin Carbon Interface for Low-RH PEMFCs.","authors":"Caihan Zhu, Dewei Li, Tao Wu, Yunan Wang","doi":"10.3390/nano16201297","DOIUrl":"https://doi.org/10.3390/nano16201297","url":null,"abstract":"Proton exchange membrane fuel cells (PEMFCs) suffer substantial performance losses under low relative humidity (RH) because catalyst-layer dehydration compromises proton conduction and interfacial reactant transport. Here, commercial Pt/C was modified through polydopamine deposition followed by thermal treatment to form an ultrathin nitrogen-doped carbon coating (NCS-Pt/C), aiming to regulate hydration and the transport environment within the catalyst layer. The modification largely preserved the porous architecture of the parent Pt/C while increasing water vapor uptake and improving surface wettability. When incorporated into membrane electrode assemblies at a cathode Pt loading of 0.10 mgPt cm-2, NCS-Pt/C delivered higher performance across 30-90% RH. The peak power density increased from 0.35 to 0.50 W cm-2 at 30% RH, from 0.57 to 0.67 W cm-2 at 60% RH, and from 0.67 to 0.77 W cm-2 at 90% RH. Under low-RH conditions, NCS-Pt/C exhibited improved dry proton accessibility and lower apparent catalyst-layer proton-conduction resistance. Substantially lower catalyst-layer oxygen transport resistance was also observed at 90% RH. These results show that the carbon interfacial modification is associated with reduced humidity sensitivity, accompanied by coupled changes in catalyst-layer hydration, interfacial transport, and reaction kinetics, with the benefit becoming particularly pronounced under dry operating conditions.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recrystallization Behavior of MgAl Layered Double Hydroxide Films on Anodized Magnesium Alloys During Phytic Acid Loading. 植酸加载过程中MgAl层状双氢氧化物膜在阳极氧化镁合金上的再结晶行为。

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-12 DOI: 10.3390/nano16201292

Jiahao Wu, Wenjun Ci, Yuanfang Deng, Jiajia Yuan, Junlan Li, Xu Dai

{"title":"Recrystallization Behavior of MgAl Layered Double Hydroxide Films on Anodized Magnesium Alloys During Phytic Acid Loading.","authors":"Jiahao Wu, Wenjun Ci, Yuanfang Deng, Jiajia Yuan, Junlan Li, Xu Dai","doi":"10.3390/nano16201292","DOIUrl":"https://doi.org/10.3390/nano16201292","url":null,"abstract":"MgAl layered double hydroxides (LDHs) films were prepared via an in-situ growth method on anodized AZ31 magnesium alloy. Subsequently, phytic acid (PA) was loaded as a corrosion inhibitor through an anion-exchange process. The structural evolution of the LDHs nanosheets during the loading process was systematically investigated. The structure, morphology, and composition of the films were characterized using field-emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and glow discharge optical emission spectroscopy. The corrosion behavior was evaluated using potentiodynamic polarization curves and electrochemical impedance spectroscopy. The results revealed that during the first four hours of ion exchange in the PA solution, the LDHs nanosheets underwent a fragmentation-recrystallization process. The incorporation of the corrosion inhibitor significantly enhanced both the stability of the LDHs nanosheets and the long-term corrosion protection of the substrate. Furthermore, a recrystallization mechanism for the LDHs nanosheets on the anodized AZ31 Mg alloy is proposed.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling Terahertz Wave Generation in InAs Quantum-Dot Containing GaAs-Based Photoconductive Antenna. 含砷化镓的InAs量子点光导天线中太赫兹波产生的建模。

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-12 DOI: 10.3390/nano16201291

Osamu Wada, Yasuo Minami, Takahiro Kitada, Toshiyuki Kaizu, Yukihiro Harada, Takashi Kita

{"title":"Modelling Terahertz Wave Generation in InAs Quantum-Dot Containing GaAs-Based Photoconductive Antenna.","authors":"Osamu Wada, Yasuo Minami, Takahiro Kitada, Toshiyuki Kaizu, Yukihiro Harada, Takashi Kita","doi":"10.3390/nano16201291","DOIUrl":"https://doi.org/10.3390/nano16201291","url":null,"abstract":"InAs quantum-dot-containing GaAs-based photoconductive antenna (PCA) devices are promising for terahertz (THz) generation under below-bandgap excitation by ultrafast laser pulses. This paper describes the results of rate equation analyses of these devices by assuming the two-step photocarrier generation via midgap states in GaAs and carrier capture into the quantum dots. In the present simulation model, the Coulomb space charge screening effect and the radiated THz field screening effect are taken into consideration. The calculations indicate that, at low excitation powers, the radiated THz field is primarily governed by the fast photocurrent transient arising from rapid electron capture into the quantum dots. At higher photoexcitation power, the THz radiation is controlled predominantly by the carrier velocity reduction immediately after the excitation pulse due to the Coulomb space charge screening effect. As the photoexcitation power increases, the Coulomb screening effect causes saturation of the THz field amplitude, whereas the radiated THz field screening effect contributes little to the saturation of the THz field amplitude. In this study, the influence of key parameters, such as the density and electron capture time of the midgap states and quantum dots, are analyzed. Existing experimental data on THz emission characteristics are discussed on the basis of the present analysis. The observed features provide comprehensive understanding on the THz generation process involving many physical parameters in PCAs and can be applied to optimizing design for high-performance devices.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermally Tunable Ultra-Broadband Terahertz Metasurface Absorber Based on VO₂ Phase Transition. 基于VO2相变的热调谐超宽带太赫兹超表面吸收体。

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-12 DOI: 10.3390/nano16201293

Ahmed Ali, Hamid Sharif, Asrafali Barkathulla, Wazie M Abdulkawi, Majeed A S Alkanhal, Yosef T Aladadi

{"title":"Thermally Tunable Ultra-Broadband Terahertz Metasurface Absorber Based on VO2 Phase Transition.","authors":"Ahmed Ali, Hamid Sharif, Asrafali Barkathulla, Wazie M Abdulkawi, Majeed A S Alkanhal, Yosef T Aladadi","doi":"10.3390/nano16201293","DOIUrl":"https://doi.org/10.3390/nano16201293","url":null,"abstract":"Vanadium dioxide (VO2), owing to its reversible insulator-to-metal phase transition, is a promising material for tunable terahertz (THz) devices. In this work, a compact VO2-based terahertz absorber is numerically proposed to achieve thermally tunable ultra-broadband absorption. The proposed single-layer metasurface employs a fourfold-symmetric integration of cross-shaped, circular-ring, and square-frame elements to induce multiple coupled resonances and their spectral overlap, providing a design strategy for broadening the absorption bandwidth while maintaining polarization-insensitive operation. The optimized structure exhibits five near-perfect absorption resonances at 3.23, 5.27, 7.34, 8.82, and 9.73 THz. At a VO2 conductivity of 2.0 × 105 S/m, the absorber achieves absorptance exceeding 90% from 2.95 to 10.36 THz, corresponding to a bandwidth of 7.41 THz and a relative bandwidth of 111.35%. The absorption mechanism is attributed to the hybridization of multiple resonant modes and effective impedance matching with free space, as confirmed by electromagnetic field and impedance analyses. Furthermore, the absorption response can be dynamically tuned through the phase transition of VO2. The absorber also exhibits polarization-insensitive behavior and maintains high absorptance over a wide range of incident angles. These results demonstrate a compact and thermally reconfigurable platform for terahertz imaging, sensing, spectroscopy, and adaptive electromagnetic stealth.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Performance Uncooled Infrared Photodetection Based on van der Waals Metallic FePd₂Te₂ Nanoflakes. 基于范德华金属FePd2Te2纳米片的高性能非冷却红外光探测。

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-11 DOI: 10.3390/nano16201289

Kang Zhang, Yeqi Shen, Wenke Xu, Tao Han, Yubing Tu, Suofu Wang, Mingsheng Long

{"title":"High-Performance Uncooled Infrared Photodetection Based on van der Waals Metallic FePd2Te2 Nanoflakes.","authors":"Kang Zhang, Yeqi Shen, Wenke Xu, Tao Han, Yubing Tu, Suofu Wang, Mingsheng Long","doi":"10.3390/nano16201289","DOIUrl":"https://doi.org/10.3390/nano16201289","url":null,"abstract":"Uncooled infrared photodetectors that combine high sensitivity, low power consumption, and broad spectral coverage remain highly desirable. However, they are still hindered by the complex epitaxial processes and cooling requirements of mainstream semiconductor technologies. Here, we demonstrate a high-performance infrared photodetector based on FePd2Te2 nanoflakes, a van der Waals metallic material that enables efficient photothermal conversion. The device operates at room temperature under a bias of 0.1 V and exhibits a broadband photoresponse spanning from the visible to the long-wave infrared. Across the measured infrared range, a wavelength-independent responsivity (R) above 50 A/W, a noise equivalent power (NEP) below 2.83 × 10-16 W/Hz1/2, and a specific detectivity (D*) exceeding 3.86 × 1012 cm Hz1/2/W are achieved. The photoresponse appears to arise from the photobolometric effect, in which the temperature rise at the contact interface is considered to modulate the contact resistance and thereby amplify the photocurrent. These results establish FePd2Te2 as a promising platform for room-temperature, low-power, and highly sensitive infrared detection.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Musical Sonification of Ligand-Engineered CsPbBr₃ Quantum Dots with Enhanced Stability. 具有增强稳定性的配体工程CsPbBr3量子点的音乐超声。

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-11 DOI: 10.3390/nano16201290

Cheng Sun, Yajuan Wang, Zhiyang Xu, Jianing Wang, Wenyan Liu

{"title":"Musical Sonification of Ligand-Engineered CsPbBr3 Quantum Dots with Enhanced Stability.","authors":"Cheng Sun, Yajuan Wang, Zhiyang Xu, Jianing Wang, Wenyan Liu","doi":"10.3390/nano16201290","DOIUrl":"https://doi.org/10.3390/nano16201290","url":null,"abstract":"CsPbBr3 quantum dots (QDs) have been widely applied in lighting, detection, display, and many other fields. However, due to their ionic crystal nature, further improvement in stability is still required for practical applications. To address this issue, this study employed a ligand engineering strategy to synthesize tributylphosphine (TBP)-modified CsPbBr3 QDs in a Zn2+-containing reaction system. Experimental results demonstrate that the modified QDs exhibit superior optical properties, as well as significantly enhanced thermal stability and resistance to UV photodegradation. The introduction of Zn2+ into the reaction system leads to a more uniform size distribution, improved monodispersity, and enhanced crystallinity of CsPbBr3 QDs. More importantly, the photostability of CsPbBr3 QDs under varied temperatures, cyclic heating-cooling processes, and prolonged UV irradiation is notably improved after Zn2+ incorporation. Furthermore, the TBP-modified CsPbBr3 QDs synthesized with Zn2+ assistance exhibit further enhanced photostability under all the aforementioned aging conditions. Additionally, we introduce a data-sonification method that translates the temporal evolution of photoluminescence spectra into audible audio signals using an oboe timbre, enabling auditory visualization of the aging process. This work not only provides an effective strategy for stabilizing perovskite QDs but also opens new possibilities for the application of luminescent materials in interactive displays.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature-Induced Structural Phase Transitions in Nano-Fe-Modified Sustainable Biochar for Efficient Sb(III) Adsorption. 纳米铁修饰可持续生物炭的温度诱导结构相变及其对Sb（III）的高效吸附。

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-11 DOI: 10.3390/nano16201288

Lei Wang, Bo Song, Qi Wang, Gaoyani Ku, Chen Chen, Zhibin Wang, Jafar Ali, Evgeni M Glebov, Xuliang Zhuang

{"title":"Temperature-Induced Structural Phase Transitions in Nano-Fe-Modified Sustainable Biochar for Efficient Sb(III) Adsorption.","authors":"Lei Wang, Bo Song, Qi Wang, Gaoyani Ku, Chen Chen, Zhibin Wang, Jafar Ali, Evgeni M Glebov, Xuliang Zhuang","doi":"10.3390/nano16201288","DOIUrl":"https://doi.org/10.3390/nano16201288","url":null,"abstract":"Nano-iron-modified biochar (Fe-SC) has emerged as a promising adsorbent for pollutant removal. However, how pyrolysis temperature changes its iron phases and affects Sb(III) removal remains unclear. In this work, Fe-SC was prepared at three pyrolysis temperatures (400 °C, 600 °C, and 800 °C) to investigate how structural phase transitions affect Sb(III) adsorption performance. XRD analysis suggests a possible evolution of Fe phases with increasing temperature, from an Fe3O4 crystalline phase at 400 °C to an Fe crystalline phase at 600 °C, and subsequently to an Fe3C crystalline phase with pronounced graphitization at 800 °C. These structural changes, together with the specific surface area and graphitization degree, strongly influenced Sb(III) adsorption. Fe-SC600 had the highest specific surface area (217.73 m2/g) and achieved nearly 80% Sb(III) removal, the highest among the three materials. Fe-SC also maintained effective Sb(III) adsorption over a broad pH range (3.0-9.0), and the presence of S2- and HCO3- ions enhanced Sb(III) removal under the tested conditions. These findings highlight the importance of optimizing pyrolysis conditions to enhance the adsorption performance of Fe-SC, with Fe-SC600 demonstrating the most promising balance of structural properties and adsorption efficiency for environmental remediation applications.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface-Engineered 3D-Printed Polymeric Flat-Panel Photoreactors with P25 TiO₂ Nanoparticles for Photocatalytic Hydrogen Evolution. 表面工程3d打印聚合物平板光反应器与P25 TiO2纳米粒子光催化析氢。

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-10 DOI: 10.3390/nano16201283

María José Torres, Jesús Román, María Del Prado Garrido, Mireya Carvela

{"title":"Surface-Engineered 3D-Printed Polymeric Flat-Panel Photoreactors with P25 TiO2 Nanoparticles for Photocatalytic Hydrogen Evolution.","authors":"María José Torres, Jesús Román, María Del Prado Garrido, Mireya Carvela","doi":"10.3390/nano16201283","DOIUrl":"https://doi.org/10.3390/nano16201283","url":null,"abstract":"In this work, a flat-panel photoreactor containing a serpentine channel was fabricated by LCD-based masked stereolithography and functionalized with commercial P25 TiO2. Computational fluid dynamics (CFD) confirmed laminar flow over 2-10 mL min-1 and described the velocity and wall-shear-stress distributions within the channel. Operating conditions were first established using suspended P25. Immobilization was then studied by varying binder type and content, P25 concentration and deposition method, together with pre-cure integration and direct printing of P25-loaded resin. The airbrushed P25/PARALOID™ B-72 coating provided the most favorable balance between reactor-level productivity and sustained response, with a post-maximum productivity retention of 47.8%. Direct printing reached the highest maximum apparent volumetric productivity (821.5 µmol H2,eq Lreactor-1 h-1), corresponding to 1.7 and 2.1 times the values obtained with suspended and airbrushed configurations, respectively, but showed a much lower productivity retention of 12.9%. Post-mortem X-ray diffraction (XRD) and scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS) showed differences in P25 distribution and surface exposure among the tested configurations. These results show that the P25 incorporation strategy strongly affects both reactor-level productivity and operational stability.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149271018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical Properties of Inorganic Perovskites CsPbBr₃ Nanosheet Based on Strain Engineering. 基于应变工程的无机钙钛矿CsPbBr3纳米片电性能研究

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-10 DOI: 10.3390/nano16201284

Yi Wu, Ruixue Wang, Hui Dong

{"title":"Electrical Properties of Inorganic Perovskites CsPbBr3 Nanosheet Based on Strain Engineering.","authors":"Yi Wu, Ruixue Wang, Hui Dong","doi":"10.3390/nano16201284","DOIUrl":"https://doi.org/10.3390/nano16201284","url":null,"abstract":"Fully inorganic CsPbX3 perovskites have emerged as promising optoelectronic materials because they retain the excellent optoelectronic properties of their hybrid counterparts while offering improved resistance to moisture and heat, although challenges such as soft crystal lattices, high ionic mobility, and easy defect formation remain. Strain engineering provides a novel approach to optimizing the optoelectronic properties of perovskite thin-film devices. This study demonstrates solution-grown CsPbBr3 nanosheets (12-22 nm thick, ~10 μm lateral size) on ITO substrates. The I-V characteristics of vertical tip/CsPbBr3/ITO structures were measured under varying compressive loads using conductive AFM, revealing load-dependent behavior. Analysis through thermionic emission modeling demonstrated an inverse correlation between the applied load and Schottky barrier height at the tip-sample interface. Furthermore, piezoresponse force microscopy quantifies thickness-dependent effective piezoelectric coefficients (d33eff = 5.8, 3.7, and 1.2 pm/V for 12, 17.5, and 22 nm nanosheets). Consistent with piezoelectric electronic theory, these results demonstrate piezoelectric-effect-induced Fermi level lowering and consequent Schottky barrier reduction. These findings provide fundamental insights for strain-engineered perovskite optoelectronics.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Friction and Tribocorrosion Behavior of Fe-Cr-B Alloys Fabricated via Extreme High-Speed Laser-Induction Hybrid Cladding. 超高速激光感应复合熔覆Fe-Cr-B合金的摩擦和摩擦腐蚀行为

IF 4.8 3区材料科学

Nanomaterials Pub Date : 2026-10-10 DOI: 10.3390/nano16201282

Pengfei Sun, Xinghua Wang, Chenghui Hu, Yanming Wu, Dengzhi Wang, Zhen Li

{"title":"Friction and Tribocorrosion Behavior of Fe-Cr-B Alloys Fabricated via Extreme High-Speed Laser-Induction Hybrid Cladding.","authors":"Pengfei Sun, Xinghua Wang, Chenghui Hu, Yanming Wu, Dengzhi Wang, Zhen Li","doi":"10.3390/nano16201282","DOIUrl":"https://doi.org/10.3390/nano16201282","url":null,"abstract":"Fe-Cr-B coatings were fabricated using laser-induction hybrid cladding and extreme high-speed laser-induction hybrid cladding (EHIC), and their microstructural evolution, dry friction performance, and tribocorrosion behavior were systematically investigated. The results indicate that the coatings consist of a matrix and eutectic region comprising M2B and martensite. With increasing scanning speed, the coarse dendritic matrix transforms into an equiaxed structure, and the overall microstructure becomes significantly refined. The dry friction mechanisms of the Fe-Cr-B coating involve oxidation and abrasive wear. The eutectic region constitutes the primary load-bearing and wear-resistant constituent within the coating. Increasing its fraction directly enhances the overall wear performance. Furthermore, the formation of a tribolayer during testing contributes to improved wear resistance. These combined factors lead to a reduction in the wear rate from 99.7 × 10-3 mm3·N-1·m-1 to 50.2 × 10-3 mm3·N-1·m-1 as the scanning speed increases. In corrosive media, the formation of a tribolayer is hindered, and electrochemical corrosion diminishes the resistance of the coating to plastic deformation, leading to a substantial increase in the wear rate. Under these conditions, the wear mechanism transitions to one dominated by abrasive wear. Owing to the high fraction of the eutectic region in the EHIC coating, its tribocorrosion performance is superior. As the scanning speed increases, the wear rate decreases from 255.8 × 10-3 mm3·N-1·m-1 to 175.4 × 10-3 mm3·N-1·m-1.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149270830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0