Coatings最新文献_第6页

Synthesis and Spectroscopic Properties of Sm3+-Activated Li6Y(BO3)3 Phosphor for Light-Emitting Diode Applications 用于发光二极管应用的 Sm3+ 激活型 Li6Y(BO3)3 磷酸盐的合成与光谱特性

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-05 DOI: 10.3390/coatings14091142

Jin Zhao, Yongchun Zhang, Jingwen Lu, Yiming Li, Yong Pan

{"title":"Synthesis and Spectroscopic Properties of Sm3+-Activated Li6Y(BO3)3 Phosphor for Light-Emitting Diode Applications","authors":"Jin Zhao, Yongchun Zhang, Jingwen Lu, Yiming Li, Yong Pan","doi":"10.3390/coatings14091142","DOIUrl":"https://doi.org/10.3390/coatings14091142","url":null,"abstract":"A series of orange-red emitting Li6Y(BO3)3: Sm3+ (LYBO: Sm3+) phosphors were produced via the high temperature solid-state method. The structure, morphology, element distribution and photoluminescent behavior of these phosphors were thoroughly examined. XRD analysis confirmed that all samples exhibited a pure phase. Under 404 nm excitation, the emission spectra included four distinct transitions of Sm3+, attributed to 4G5/2→6H5/2 (565 nm), 4G5/2→6H7/2 (613 nm), 4G5/2→6H9/2 (647 nm) and 4G5/2→6H11/2 (708 nm). The ideal doping level for LYBO: xSm3+ is x = 0.05, and the concentration quenching primarily stems from electric dipole–dipole interactions among the ions. As the amount of Sm3+ dopant was increased, the fluorescence lifetime decreased. The CIE indicates that LYBO: 0.05Sm3+ is located in the orange-red region, exhibiting a high color purity (99%) and low color temperature (1711 K). The phosphor demonstrated excellent thermal stability and its activation energy was 0.3238 eV. In summary, LYBO: Sm3+ is a potential orange-red phosphor that can be coated onto near-ultraviolet chips suitable for W-LEDs.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215816","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

MnBi2Te4 Thin-Film Photodetector with a Millisecond Response Speed and Long-Term Air Stability 具有毫秒级响应速度和长期空气稳定性的 MnBi2Te4 薄膜光电探测器

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-04 DOI: 10.3390/coatings14091134

Ming Yang, Haotian Ren, Wenze Deng, Haoliang Chang, Qiqin Li, Hongxi Zhou, Xiaoguang Tu, Mian Zhong, Fei Li, Xinyu Zhu

引用次数: 0

The Role of the Manganese Content on the Properties of Mn3O4 and Reduced Graphene Oxide Nanocomposites for Supercapacitor Electrodes 锰含量对用于超级电容器电极的 Mn3O4 和还原氧化石墨烯纳米复合材料性能的影响

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-04 DOI: 10.3390/coatings14091136

Víctor Fernández-Jiménez, Santiago de Bernardi-Martín, Alejandra García-Gómez, David López-Díaz, M. Jesús Sánchez-Montero, M. Mercedes Velázquez, M. Dolores Merchán

{"title":"The Role of the Manganese Content on the Properties of Mn3O4 and Reduced Graphene Oxide Nanocomposites for Supercapacitor Electrodes","authors":"Víctor Fernández-Jiménez, Santiago de Bernardi-Martín, Alejandra García-Gómez, David López-Díaz, M. Jesús Sánchez-Montero, M. Mercedes Velázquez, M. Dolores Merchán","doi":"10.3390/coatings14091136","DOIUrl":"https://doi.org/10.3390/coatings14091136","url":null,"abstract":"Increasing the energy density and power of supercapacitors through hybrids of carbonaceous materials and metal oxides continues to be the subject of numerous research works. The correlation between specific capacitance and the properties of materials used as electrodes attracts great interest. In the present study, we investigated composites (GO/Mn3O4) prepared by the hydrothermal method with a variable ratio of GO/Mn3O4 and tested them as supercapacitor electrode materials in three- and two-electrode cells. The chemical characterization carried out by X-ray photoelectron spectroscopy and the adsorption techniques used allowed the determination of the surface carbon and oxygen content, as well as its textural properties. In this work, we analyzed the contribution of the double layer and the Faradaic reactions to the value of the final capacitance of the synthesized materials. Beyond empirically obtaining the electrochemical properties, these have been related to the physicochemical characteristics of the hybrids to help design materials with the best performance for supercapacitor electrodes.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215844","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

Study of a New Novel HVOAF Coating Based on a New Multicomponent Al80Mg10Si5Cu5 Alloy 基于新型多组分 Al80Mg10Si5Cu5 合金的新型 HVOAF 涂层研究

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-04 DOI: 10.3390/coatings14091135

Ester Villanueva, Iban Vicario, Carlos Vaquero, Joseba Albizuri, Maria Teresa Guraya, Nerea Burgos, Iñaki Hurtado

{"title":"Study of a New Novel HVOAF Coating Based on a New Multicomponent Al80Mg10Si5Cu5 Alloy","authors":"Ester Villanueva, Iban Vicario, Carlos Vaquero, Joseba Albizuri, Maria Teresa Guraya, Nerea Burgos, Iñaki Hurtado","doi":"10.3390/coatings14091135","DOIUrl":"https://doi.org/10.3390/coatings14091135","url":null,"abstract":"This paper presents and demonstrates the development of a new lightweight coating for aluminum alloy from a novel multicomponent alloy based on the AlSiMgCu system. The coating was applied using a newly designed approach that combined high velocity oxy-fuel (HVOF) and plasma spraying processes. This hybrid technique enables the deposition of coatings with enhanced performance characteristics. The optical microscopy (OM) and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM + EDS) revealed a strong adhesion and compaction between the multicomponent coating and the A6061 substrate. The new coating improved hardness by 50% and increased electrical conductivity by approximately 3.3 times compared to the as-cast alloy. Corrosion tests showed a lower corrosion rate, comparable to thermally treated A6061 alloy. Tribological tests indicated over 20% reduction in friction and over 50% reduction in wear rate. This suggests that multicomponent aluminum coatings could improve automotive and parts in contact with hydrogen by enhancing hydrogen fragilization resistance, corrosion resistance, electrical conductivity, and wear properties, with further optimization of thermal spraying potentially boosting performance even further.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215823","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

Ultrasound-Assisted Acellular Spinal Cord Scaffold for Spinal Cord Injury Treatment 超声辅助细胞脊髓支架治疗脊髓损伤

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-04 DOI: 10.3390/coatings14091137

Xi Deng, Yun Liu, Zhongsheng Xu, Hong Yin

引用次数: 0

Wear Behavior of TiN/TiAlSiN Nanocomposite Multilayer Coatings from Ambient Temperature to Medium Temperature TiN/TiAlSiN 纳米复合多层涂层从常温到中温的磨损行为

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-04 DOI: 10.3390/coatings14091139

Hairui Ma, Qiang Miao, Wenping Liang, Shijie Sun, Yan Qi, Feilong Jia, Xiangle Chang

{"title":"Wear Behavior of TiN/TiAlSiN Nanocomposite Multilayer Coatings from Ambient Temperature to Medium Temperature","authors":"Hairui Ma, Qiang Miao, Wenping Liang, Shijie Sun, Yan Qi, Feilong Jia, Xiangle Chang","doi":"10.3390/coatings14091139","DOIUrl":"https://doi.org/10.3390/coatings14091139","url":null,"abstract":"TiN/TiAlSiN nanocomposite multilayer coatings were deposited on a titanium alloy by multi-arc ion plating. The investigation of the wear behavior of TiN/TiAlSiN multilayer coatings against Si3N4 was conducted at temperatures of 25 °C, 300 °C, and 500 °C using a ball-on-disk tribometer. Additionally, to gain a deeper understanding of medium-temperature oxidation products, an oxidation test was performed at 500 °C for 10 h. The microstructure and chemical composition of the coatings were evaluated by X-ray diffraction and scanning electron microscopy. The primary peak in the XRD pattern of the multilayer coating changed from TiN (111) to Ti3AlN (111) after the oxidation test. The hardness of the TiN/TiAlSiN multilayer coating was 1540 HV0.1, representing a notable five times improvement compared to the substrate. The critical load in the scratch test was 52.3 N, indicating robust adhesion performance. The wear rate exhibited a sharp increase from 25 °C to 300 °C, compared to the rise from 300 °C to 500 °C. Furthermore, the friction coefficient of the coated sample was more stable than the substrate, with different scratch track morphologies between the samples before and after the oxidation test.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215833","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

Study on the Alloying Elements Competition Mechanism of Nix1Crx2Cox3Al15Ti10 Alloys Based on High-Throughput Computation and Numerical Analysis 基于高通量计算和数值分析的 Nix1Crx2Cox3Al15Ti10 合金的合金元素竞争机制研究

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-04 DOI: 10.3390/coatings14091138

Yu Liu, Lijun Wang, Wenjie He, Yunpeng Liu

{"title":"Study on the Alloying Elements Competition Mechanism of Nix1Crx2Cox3Al15Ti10 Alloys Based on High-Throughput Computation and Numerical Analysis","authors":"Yu Liu, Lijun Wang, Wenjie He, Yunpeng Liu","doi":"10.3390/coatings14091138","DOIUrl":"https://doi.org/10.3390/coatings14091138","url":null,"abstract":"Previous studies on the physical properties of alloy materials often focus solely on analyzing the impact of individual alloying element content, overlooking the underlying mechanism behind the synergistic action of multiple alloying elements. Therefore, in this study, we propose a combination of high-throughput computation and numerical analysis to conduct single-element (SE) analysis and multi-element (ME) analysis on the internal relationships between alloying element content and physical properties for the multi-component Nix1Crx2Cox3Al15Ti10 alloys, aiming to elucidate the competition mechanism among the Ni, Cr, and Co elements. The analysis of SE reveals how the physical properties of alloys are affected by the content of each individual alloying element, and the ME analysis further unveils the underlying competitive relationships among multiple alloying elements. The order of competitive intensity for the formation of lattice constant is Cr > Co > Ni, whereas for the formation of elastic constants and elastic moduli it is Ni > Co > Cr. At the same time, there are contradictory conclusions, such as the SE analysis showing that the Ni content is positively correlated with elastic constant C11, while the ME analysis demonstrates that the Ni element produces a negative competitive direction. This outcome arises from the omission of considering the combined impacts of various alloying elements in SE analysis. Therefore, the ME analysis can compensate for the limitations of SE analysis, and the integration of these two analytical methods is more conducive to elucidating the competition mechanism among various alloying elements in shaping the physical properties of alloys, which provides a promising avenue for theoretical research.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215838","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

Research on Process Control of Laser-Based Direct Energy Deposition Based on Real-Time Monitoring of Molten Pool 基于熔池实时监控的激光直接能量沉积过程控制研究

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-03 DOI: 10.3390/coatings14091131

Haoda Wang, Jingbin Hao, Mengsen Ding, Xuanyu Zheng, Haifeng Yang, Hao Liu

{"title":"Research on Process Control of Laser-Based Direct Energy Deposition Based on Real-Time Monitoring of Molten Pool","authors":"Haoda Wang, Jingbin Hao, Mengsen Ding, Xuanyu Zheng, Haifeng Yang, Hao Liu","doi":"10.3390/coatings14091131","DOIUrl":"https://doi.org/10.3390/coatings14091131","url":null,"abstract":"In the process of laser-based direct energy deposition (DED-LB), the quality of the deposited layer will be affected by the process parameters and the external environment, and there are problems such as poor stability and low accuracy. A molten pool monitoring method based on coaxial vision is proposed. Firstly, the molten pool image is captured by a coaxial CCD camera, and the geometric features of the molten pool are accurately extracted by image processing techniques such as grayscale, median filtering noise reduction, and K-means clustering combined with threshold segmentation. The molten pool width is accurately extracted by the Canny operator combined with the minimum boundary rectangle method, and it is used as the feedback of weld pool control. The influence of process parameters on the molten pool was further analyzed. The results show that with an increase in laser power, the width and area of the molten pool increase monotonously, but exceeding the material limit will cause distortion. Increasing the scanning speed will reduce the size of the molten pool. By comparing the molten pool under constant power mode and width control mode, it is found that in width control mode, the melt pool width fluctuates less, and the machining accuracy is improved, validating the effectiveness of the real-time control system.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215826","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

All-Layer Electrodeposition of a CdTe/Hg0.1Cd0.9Te/CdTe Photodetector for Short- and Mid-Wavelength Infrared Detection 用于中短波红外探测的全层电沉积碲化镉/汞0.1碲化镉/碲化镉光电探测器

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-03 DOI: 10.3390/coatings14091133

Vianey A. Candelas-Urrea, Carlos Villa-Angulo, Iván O. Hernández-Fuentes, Ricardo Morales-Carbajal, Rafael Villa-Angulo

{"title":"All-Layer Electrodeposition of a CdTe/Hg0.1Cd0.9Te/CdTe Photodetector for Short- and Mid-Wavelength Infrared Detection","authors":"Vianey A. Candelas-Urrea, Carlos Villa-Angulo, Iván O. Hernández-Fuentes, Ricardo Morales-Carbajal, Rafael Villa-Angulo","doi":"10.3390/coatings14091133","DOIUrl":"https://doi.org/10.3390/coatings14091133","url":null,"abstract":"CdS, CdTe, Hg0.1Cd0.9Te, CdTe, and Ag films were progressively electrodeposited on ITO-coated soda–lime glass to manufacture a short- and mid-wavelength infrared photodetector. A distinctive feature of the applied electrodeposition method is the use of a non-aqueous solution containing ethylene glycol (EG) as the electrolyte in a traditional three-electrode configuration for every film deposition. Using EG as a supplementary electrolyte and using the same deposition conditions with a potential below 0.75 V for all film coatings reduces their environmental incompatibility and offers a low-cost and low-energy route for fabricating the reported photodetector. The produced photodetector has a sensitivity of up to ≈957 nm with a detectivity (D*) of 2.86 × 1012 cm Hz1/2 W−1 and a dark current density (Jdark) of 10−6 mA cm−2. Furthermore, the manufactured photodiode exhibits self-powered performance because Voc and Jsc are self-generated, unlike previously reported photodiodes. The presented all-layer electrodeposition assembly approach can easily be adapted to fabricate sensing devices for different applications.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215847","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

A Wideband Polarization-Insensitive Bistatic Radar Cross-Section Reduction Design Based on Hybrid Spherical Phase-Chessboard Metasurfaces 基于混合球面相位棋盘元曲面的宽带极化不敏感双向雷达截面缩小设计

IF 3.4 3区材料科学

Coatings Pub Date : 2024-09-03 DOI: 10.3390/coatings14091130

Shun Zhang, Qin Qin, Mengbo Hua

{"title":"A Wideband Polarization-Insensitive Bistatic Radar Cross-Section Reduction Design Based on Hybrid Spherical Phase-Chessboard Metasurfaces","authors":"Shun Zhang, Qin Qin, Mengbo Hua","doi":"10.3390/coatings14091130","DOIUrl":"https://doi.org/10.3390/coatings14091130","url":null,"abstract":"A wideband polarization-insensitive bistatic radar cross-section (RCS) reduction design under linear and circular polarization incidence is proposed based on spherical-chessboard metasurfaces. A new metasurface element with wideband characteristics was designed, including a double split-ring structure, single-layer media, and metal board. In the proposed RCS-reduction design, the Pancharatnam–Berry (P-B) phase theory is applied with the designed metasurface element to realize phase distribution mimicking the low-scattering sphere, and thus realizing RCS reduction. In addition, the chessboard configuration is combined with spherical phase distribution to further improve the performance of monostatic and bistatic RCS reduction. Finally, the proposed RCS reduction design can not only realize wideband RCS reduction but also exhibit polarization-insensitive characteristics. It realized 10 dB monostatic and bistatic RCS reduction in a frequency band ranging from 8.5 to 21 GHz (84.8% relative bandwidth) under linear polarization (LP) and circular polarization (CP) incidence. The straightforward and efficient design method of the hybrid spherical chessboard can effectively avoid the complex and time-consuming optimization process in RCS-reduction design.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216037","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