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Investigation of the Flow Characteristics of Coated Slag during Continuous Casting 连铸过程中涂层熔渣流动特性的研究
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-11 DOI: 10.3390/coatings14091170
Guohui Li, Shanjiao Wang, Fengming Du
During continuous casting, coated slag is applied to molten steel to enhance heat transfer and lubrication. In this study, a numerical calculation model was built to reveal the flowing characteristic of slag according to the fundamental principles of heat transfer and viscous fluid mechanics. The flow and heat transfer behaviour of protective slag on the surface of molten steel and the flow velocity of liquid slag in slag channel gaps were calculated and analyzed. The streaming and thermal conduction situation of slag on the surface of molten steel, as well as the flow velocity of liquid flux in the slag passage gap, were calculated and analyzed. The results showed that as the thickness of the liquidus slag film increased from 10 to 12 mm, the thermal flux density at the top of the flux film layer decreased from 0.1059 to 0.0882 MW/m2. The heat flux density increased rapidly within 0.1 m of the narrow side of the mould, reaching a peak value of 2.27 MW/m2. As the viscosity temperature factor of the flux increased from 0.45 to 2.05, the maximum floating speed of the liquid film from the water inlet to the narrow side in the centre district of the mould decreased from 0.0316 to 0.028 m/s, representing a reduction of approximately 11.4%. This study can provide a reference for the design and improvement of protective slag.
在连铸过程中,为了加强传热和润滑,会在钢水中加入涂层熔渣。本研究根据传热学和粘性流体力学的基本原理,建立了一个数值计算模型来揭示熔渣的流动特性。计算并分析了保护渣在钢水表面的流动和传热行为,以及液态渣在渣道间隙中的流速。计算并分析了保护渣在钢水表面的流动和热传导情况,以及液体流体在保护渣通道间隙中的流动速度。结果表明,随着液态熔渣膜厚度从 10 mm 增加到 12 mm,熔剂膜层顶部的热通量密度从 0.1059 MW/m2 下降到 0.0882 MW/m2。在结晶器窄边 0.1 米范围内,热通量密度迅速增加,达到 2.27 MW/m2 的峰值。随着通量的粘温系数从 0.45 增加到 2.05,液膜从进水口到结晶器中心区窄侧的最大浮动速度从 0.0316 米/秒下降到 0.028 米/秒,下降了约 11.4%。这项研究可为保护渣的设计和改进提供参考。
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引用次数: 0
Microstructure and Properties of CoCrFeNiTix High-Entropy Alloys Fabricated by Laser Additive Manufacturing 用激光快速成型技术制造的 CoCrFeNiTix 高熵合金的微观结构与性能
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-11 DOI: 10.3390/coatings14091171
Kai Wang, Daliang Song, Likun Li, Guanghui Shao, Yingye Mi, Huiping Hu, Chuan Liu, Ping Tan
CoCrFeNi HEAs have better ductility, while the strength and corrosion resistance need to be further improved, while metal materials for deep-sea operations put forward the requirement of excellent mechanical properties and very high corrosion resistance; however, CoCrFeNi HEAs have been less studied for the trade-off between mechanical properties and corrosion resistance. Therefore, the present study utilized the laser melting deposition (LMD) technique to fabricate a series of (CoCrFeNi)Tix (x = 0.2, 0.4, 0.6, 0.8, 1.0 at.%) HEAs and systematically investigated the influence of Ti content on the alloy’s microstructure, phase composition, mechanical properties, and electrochemical performance. The research findings revealed that as the Ti content increased, the alloy gradually transformed from a single face-centered cubic (FCC) phase to an FCC and body-centered cubic (BCC) dual-phase structure. The addition of Ti induced a transition in the alloy’s microstructure from an equiaxed to a dendritic morphology, accompanied by grain refinement. Energy dispersive spectroscopy analysis confirmed the uniform distribution of Ti within the alloy. The hardness of the alloy increased significantly with the increase in Ti content, reaching 804.5 HV when the Ti content was 1.0 at.%, which was 4.13 times higher than the Ti-free alloy. The tensile and compression test results showed that the (CoCrFeNi)Tix alloy with a Ti content of 0.4 at.% exhibited the best overall mechanical performance. The electrochemical test results indicated that the addition of Ti effectively enhanced the corrosion resistance of the alloy, with the 0.4 at.% Ti-containing alloy exhibiting the optimal corrosion resistance. This study provides a strong theoretical and experimental foundation for the design of high-performance CoCrFeNi-based HEAs.
CoCrFeNi HEAs 具有较好的延展性,但强度和耐腐蚀性有待进一步提高,而深海作业用金属材料则要求具有优异的机械性能和极高的耐腐蚀性;然而,对 CoCrFeNi HEAs 在机械性能和耐腐蚀性之间的权衡研究较少。因此,本研究利用激光熔融沉积(LMD)技术制备了一系列 (CoCrFeNi)Tix (x = 0.2, 0.4, 0.6, 0.8, 1.0 at.%) HEA,并系统研究了 Ti 含量对合金微观结构、相组成、机械性能和电化学性能的影响。研究结果表明,随着钛含量的增加,合金逐渐从单一的面心立方(FCC)相转变为 FCC 和体心立方(BCC)双相结构。钛的加入使合金的微观结构从等轴形态转变为树枝状形态,并伴随着晶粒细化。能量色散光谱分析证实了钛在合金中的均匀分布。合金的硬度随着钛含量的增加而显著提高,当钛含量为 1.0 at.% 时,硬度达到 804.5 HV,是无钛合金的 4.13 倍。拉伸和压缩测试结果表明,Ti 含量为 0.4%的 (CoCrFeNi)Tix 合金具有最佳的整体机械性能。电化学测试结果表明,Ti 的添加有效地增强了合金的耐腐蚀性,其中含 Ti 0.4 at.% 的合金表现出最佳的耐腐蚀性。这项研究为设计高性能 CoCrFeNi 基 HEA 提供了坚实的理论和实验基础。
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引用次数: 0
Fabrication of Corrosion-Resistant Superhydrophobic Coatings and Impermeable Porous Structures Using Fluorinated Microemulsions Containing Thermally Decomposable Surfactants 利用含可热分解表面活性剂的氟化微乳液制造耐腐蚀超疏水涂层和不透水多孔结构
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-11 DOI: 10.3390/coatings14091176
Bin Zhang, Hongen Zhang, Qiang Ren, Bei He, Yi Zhang, Zhengwu Jiang
In this work, a series of fluorinated microemulsions were synthesized using thermally decomposable N-dodecyl-N,N-dimethylamine N-oxide (LDAO) as surfactant. Then, polybutylene terephthalate nonwoven fabrics (PBT) were coated with microemulsion and heat-treated. Superhydrophobic and oil-repellent modified PBT with WCA (water contact angle) of about 152°, a sliding angle of about 2.1°, and oil repellency grade of 8 were prepared. The effect of surfactants on the surface wettability of hydrophobic materials was analyzed by TG-DTA, XPS, and WCA tests. The results show that surfactants decrease the WCA of hydrophobic materials, but LDAO can eliminate this effect by heat treatment. The anti-corrosion and permeability of LDAO coatings were compared with those of conventional fluorinated coatings through degradation and anti-permeability tests. It was shown that the LDAO fluorinated superhydrophobic coating is more resistant to corrosion by chemical solutions and significantly improves the impermeability of porous materials. Anti-fouling and self-cleaning tests showed excellent anti-fouling and self-cleaning properties on several common substrate surfaces modified with LDAO fluorinated microemulsions. It is expected that these new LDAO fluorinated microemulsions have promising applications in the preparation of corrosion-resistant surfaces and impermeable structures.
本研究以可热分解的 N-十二烷基-N,N-二甲胺 N-氧化物(LDAO)为表面活性剂,合成了一系列含氟微乳液。然后,在聚对苯二甲酸丁二醇酯无纺布(PBT)上涂覆微乳液并进行热处理。制备出了超疏水和憎油改性 PBT,其 WCA(水接触角)约为 152°,滑动角约为 2.1°,憎油等级为 8 级。通过 TG-DTA、XPS 和 WCA 测试分析了表面活性剂对疏水材料表面润湿性的影响。结果表明,表面活性剂会降低疏水材料的 WCA,但 LDAO 可以通过热处理消除这种影响。通过降解和抗渗透性测试,比较了 LDAO 涂层与传统含氟涂层的抗腐蚀性和抗渗透性。结果表明,LDAO 含氟超疏水涂层更能抵抗化学溶液的腐蚀,并能显著提高多孔材料的抗渗性。防污和自清洁测试表明,用 LDAO 氟化微乳液改性的几种常见基材表面具有优异的防污和自清洁性能。预计这些新型 LDAO 含氟微乳液在制备抗腐蚀表面和防渗结构方面具有广阔的应用前景。
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引用次数: 0
Development of a Controlled Low-Strength Material Containing Paraffin–Rice Husk Ash Composite Phase Change Material 开发含石蜡-稻壳灰复合相变材料的可控低强度材料
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-11 DOI: 10.3390/coatings14091173
Hongfei Xu, Wenting Qu
In order to reduce heat loss and diffusion of underground heating pipelines, this research incorporated phase change material (PCM) into the controlled low-strength material (CLSM) to prepare a pipeline backfill material with temperature control performance. In response to the problem that PCM leaks easily, a new type of paraffin–rice husk ash composite PCM (PR-PCM) was obtained by adsorbing melted paraffin into rice husk ash. Through mixing PR-PCM with dredged sediment (DS) and ordinary Portland cement (OPC), a controlled low-strength material (CLSM) with temperature control performance was prepared. The flowability, mechanical properties, microscopic characteristics, thermal characteristics, and durability of CLSM were analyzed through flowability, unconfined compressive strength (UCS), X-ray diffraction (XRD), scanning electronic microscopy (SEM), differential scanning calorimetry (DSC), and phase change cycle tests. The results show that when water consumption is constant, as the PR-PCM content increases, the flowability of CLSM increases, and the strength decreases. The CLSM has an obvious paraffin diffraction peak in the XRD pattern, and its microstructure is dense with few pores. The melting point of CLSM is 50.65 °C and the latent heat is 4.10 J/g. Compared with CLSM without PR-PCM, the maximum temperature difference during the heating process can reach 3.40 °C, and the heat storage performance is improved by 4.1%. The strength of CLSM increases and the melting point decreases after phase change cycles. CLSM containing PR-PCM has the characteristics of phase change temperature control, which plays a positive role in reducing heat loss by heating pipelines and temperature change in backfill areas.
为了减少地下供热管道的热量损失和扩散,本研究在可控低强度材料(CLSM)中加入相变材料(PCM),制备出具有温度控制性能的管道回填材料。针对 PCM 容易泄漏的问题,研究人员将熔化的石蜡吸附在稻壳灰中,得到了一种新型石蜡-稻壳灰复合 PCM(PR-PCM)。通过将石蜡-稻壳灰复合材料与疏浚沉积物(DS)和普通硅酸盐水泥(OPC)混合,制备出具有温度控制性能的可控低强度材料(CLSM)。通过流动性、无侧限抗压强度(UCS)、X 射线衍射(XRD)、扫描电子显微镜(SEM)、差示扫描量热仪(DSC)和相变循环试验,分析了可控低强度材料的流动性、力学性能、微观特性、热特性和耐久性。结果表明,在用水量不变的情况下,随着 PR-PCM 含量的增加,CLSM 的流动性增加,强度降低。在 XRD 图谱中,CLSM 具有明显的石蜡衍射峰,其微观结构致密,孔隙较少。CLSM 的熔点为 50.65 °C,潜热为 4.10 J/g。与不含 PR-PCM 的 CLSM 相比,加热过程中的最大温差可达 3.40 ℃,蓄热性能提高了 4.1%。相变循环后,CLSM 的强度增加,熔点降低。含有 PR-PCM 的 CLSM 具有相变温度控制的特点,对减少加热管道的热量损失和回填区域的温度变化具有积极作用。
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引用次数: 0
Study on the Multi-Physical Field Simulation of the Double-Glow Plasma Alloying Process Parameters 双辉等离子合金工艺参数的多物理场模拟研究
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-11 DOI: 10.3390/coatings14091175
Lu Yu, Yiming Wen, Jindong Zhou, Yanzhao Qiu, Danning Yang, Hao Dai, Huilong Zhu, Zhiyuan Hu, Gongtao Liu, Aqib Mashood Khan, Hongyan Wu
In order to study the coupling mechanism of the process parameters during the double-glow discharge process, and thus to enhance the theoretical study of double-glow plasma surface metallurgical technology, in this paper, a two-dimensional fluid model is established using COMSOL simulation software. The effects of key processing factors on the distribution of electrons and excited argon ions, potential and electron temperature in the coupling process of double-glow discharge were investigated. The results indicated that the electron density between the two electrode plates increases as the voltage difference increases. The optimal working pressure was kept between 0.14 Torr and 0.29 Torr. The optimal electrode spacing was between 15 mm and 30 mm and decreased with the increase in pressure. Compared with the actual plasma surface alloying process experiment, the simulation results were consistent with the experiments. The research can guide experiments by combining simulation and theory, and the predictability and accuracy of double-glow surface metallurgy technology have been improved.
为了研究双辉放电过程中工艺参数的耦合机理,从而加强双辉等离子体表面冶金技术的理论研究,本文利用 COMSOL 仿真软件建立了二维流体模型。研究了双辉放电耦合过程中关键加工因素对电子和受激氩离子分布、电势和电子温度的影响。结果表明,两个电极板之间的电子密度随着电压差的增大而增大。最佳工作压力保持在 0.14 托和 0.29 托之间。最佳电极间距在 15 毫米和 30 毫米之间,并随着压力的增加而减小。与实际等离子体表面合金化过程实验相比,模拟结果与实验结果一致。该研究可通过模拟与理论相结合的方法指导实验,提高了双辉表面冶金技术的可预测性和准确性。
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引用次数: 0
The Effects of Different Ultrasonic Composite Surface Modifications on the Properties of H13 Steel for Shield Tunnel Machine Cutter Ring 不同超声波复合表面改性对盾构隧道机刀环用 H13 钢性能的影响
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-09 DOI: 10.3390/coatings14091165
Xiuyu Chen, Yalong Li, Longhui Li, Huanbin Xu, Yi Li, Zhilong Xu, Qingshan Jiang, Shixu Mu, Yin Li, Heng Liu
Tunnel boring machines (TBMs) are exposed to the impact of the ground shattering force and the friction of sandstone during excavation work, and are prone to wear and breakage, and other failures. Traditional heat treatment processes cannot simultaneously achieve the required high-energy composite structure of hard external and tough internal properties for cutter rings, leading to inadequate wear resistance and impact toughness under working conditions. This study utilizes H13 steel as the base material, and based on a study of carburizing, nitriding, and ultrasonic impact processes for H13 steel analyzing the effects of different high-energy composite modification processes on the hardness distribution, microstructure, and residual stress of H13 steel, the mechanisms by which high-energy composite modification processes affect the wear resistance and impact resistance of H13 steel are revealed. The results indicate that the wear amount and impact toughness of the sample subjected to carburizing and ultrasonic surface rolling composite strengthening were 1.9 mg and 27.34 J/cm2, demonstrating the best wear and impact resistance. This combination of properties allows the H13 steel cutter ring to achieve the optimal overall performance in terms of wear resistance and impact resistance.
隧道掘进机(TBM)在挖掘工作中会受到地面破碎力和砂岩摩擦力的影响,容易出现磨损、断裂等故障。传统的热处理工艺无法同时实现刀环所需的外硬内韧的高能复合结构,导致其在工作条件下的耐磨性和冲击韧性不足。本研究以 H13 钢为基体材料,在对 H13 钢进行渗碳、渗氮和超声冲击工艺研究的基础上,分析了不同高能复合改性工艺对 H13 钢硬度分布、显微组织和残余应力的影响,揭示了高能复合改性工艺对 H13 钢耐磨性和抗冲击性的影响机理。结果表明,经过渗碳和超声波表面滚压复合强化的试样的磨损量和冲击韧性分别为 1.9 mg 和 27.34 J/cm2,表现出最佳的耐磨性和抗冲击性。这种性能组合使 H13 钢刀环在耐磨性和抗冲击性方面达到了最佳的综合性能。
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引用次数: 0
Assessment of Warionia saharea Essential Oil as a Green Corrosion Inhibitor for Mild Steel in HCl: Experimental and Computational Studies 将 Warionia saharea 精油作为盐酸中低碳钢的绿色缓蚀剂的评估:实验和计算研究
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-09 DOI: 10.3390/coatings14091164
Abdeslam Ansari, Youssef Youssefi, Mohamed Tanghourte, Nazih Ouassou, Nazih Asoufar, Mohamed Znini, Hassane Lgaz, El Houssine Mabrouk, Mohamed Azrour, Han-Seung Lee, Belkheir Hammouti
The objective of this research work is the study of the inhibitory effect of Warionia saharea essential oil (WSEO) on the corrosion of mild steel (MS) in molar HCl solution, employing both experimental and theoretical methods. This inhibitory effect (IE) has been evaluated by using a combination of weight loss measurements (LW) and various electrochemical methods, such as open circuit potential (OCP), potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) experiments. The LW results indicated that IE increased with inhibitor concentration, reaching 83.34% at 3.00 g/L. The PDP analysis suggested that WSEO functions as a mixed inhibitor, while in the EIS results the Rct values increased with inhibitor concentration to reach 165.8 Ω cm2 at 2.00 g/L, suggesting a defensive film formation by WSEO molecules over the metallic surface. The thermodynamic study demonstrated that the WSEO molecules adsorption on the MS surface followed a Langmuir isotherm, involving mixed physical and chemical (physicochemical) adsorption on the MS surface. Theoretical methods, including density functional theory (DFT) and molecular dynamics (MD) simulations, were employed to elucidate the inhibition mechanisms of the three main components of WSEO. The quantum chemical analysis, using density functional theory (DFT) and molecular dynamics (MD) simulations, showed a low ΔEgap value of 6.30 eV and a low adsorption energy (Eads) value on an Fe (110) substrate of −258 Kcal/mol for (E)-Nerolidol, indicating the significant contribution of this molecule to the overall corrosion inhibition effect of WSEO. The scanning electron microscope (SEM) analysis verified the presence of a protective film formed by the inhibitor on the MS surface. This study highlights the potential of WSEO as a sustainable and green corrosion inhibitor in acidic environments.
这项研究工作的目的是采用实验和理论方法,研究 Warionia saharea 精油(WSEO)对盐酸摩尔溶液中低碳钢(MS)腐蚀的抑制作用。通过结合使用失重测量(LW)和各种电化学方法,如开路电位(OCP)、电位极化(PDP)和电化学阻抗光谱(EIS)实验,对这种抑制作用(IE)进行了评估。LW 结果表明,IE 随抑制剂浓度的增加而增加,在 3.00 g/L 时达到 83.34%。PDP 分析表明 WSEO 起着混合抑制剂的作用,而在 EIS 结果中,Rct 值随着抑制剂浓度的增加而增加,在 2.00 g/L 时达到 165.8 Ω cm2,这表明 WSEO 分子在金属表面形成了一层防御膜。热力学研究表明,WSEO 分子在 MS 表面的吸附遵循 Langmuir 等温线,涉及 MS 表面的物理和化学(物理化学)混合吸附。研究采用密度泛函理论(DFT)和分子动力学(MD)模拟等理论方法阐明了 WSEO 三种主要成分的抑制机理。利用密度泛函理论(DFT)和分子动力学(MD)模拟进行的量子化学分析表明,(E)-橙花叔醇在铁(110)基底上的ΔEgap值较低,为6.30 eV,吸附能(Eads)值较低,为-258 Kcal/mol,表明该分子对WSEO的整体缓蚀效果有重要贡献。扫描电子显微镜(SEM)分析验证了抑制剂在 MS 表面形成的保护膜的存在。这项研究凸显了 WSEO 作为酸性环境中可持续绿色缓蚀剂的潜力。
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引用次数: 0
Expanded Illite Filler in UV-Curable Polymer Electrolytes for All-Solid-State Li-Ion Batteries 用于全固态锂离子电池的紫外线固化聚合物电解质中的膨胀伊利石填料
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-09 DOI: 10.3390/coatings14091158
Minseong Bae, Seongki Ahn, Sunkyung You, Jae-kwang Kim, Daewon Kim, Hanjoo Kim, Hong-Il Kim, Jinjoo Park
In this study, we explored the potential of illite sourced from Yeongdong-eup, South Korea, as a filler in polymer electrolytes for all-solid-state Li-ion batteries. The illite was expanded (EI) by acid treatment and UV curing was employed to synthesize the polymer electrolytes. The Li+ ionic conductivity of the polymer electrolytes was measured at various EI contents, revealing the highest conductivity of 1.08 × 10−2 S cm−1 at 4 wt% of the EI. The electrochemical performance of NMC cells assembled with the EI-incorporated polymer electrolyte showed a good discharge capacity of over 158.6 mAh g−1 with a coulombic efficiency of 99%. These findings demonstrate the significant potential of EI as a sustainable and efficient filler material for enhancing the performance of polymer-based all-solid-state Li batteries. This study highlighted the applicability of illite sourced from South Korea and its potential contribution to the development of polymer-based all-solid-state batteries.
在这项研究中,我们探讨了韩国永同邑的伊利石作为全固态锂离子电池聚合物电解质填料的潜力。伊利石经酸处理膨胀(EI)后,采用紫外固化法合成聚合物电解质。测量了不同 EI 含量下聚合物电解质的 Li+ 离子电导率,结果表明,在 EI 含量为 4 wt% 时,电导率最高,为 1.08 × 10-2 S cm-1。使用加入了 EI 的聚合物电解质组装的 NMC 电池的电化学性能良好,放电容量超过 158.6 mAh g-1,库仑效率达到 99%。这些研究结果表明,EI 作为一种可持续的高效填充材料,在提高聚合物全固态锂电池性能方面具有巨大潜力。这项研究强调了来自韩国的伊利石的适用性及其对聚合物全固态电池开发的潜在贡献。
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引用次数: 0
Synergistic Effect of Elliptic Textures and H-DLC Coatings for Enhancing the Tribological Performance of CuAl10Fe5Ni5 Valve Plate Surfaces 椭圆纹理和 H-DLC 涂层对提高 CuAl10Fe5Ni5 阀板表面摩擦学性能的协同效应
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-09 DOI: 10.3390/coatings14091161
Mengjiao Wang, Mingbo Zhu, Xinzheng Hu, Kun Liu, Xuefeng Fan, Xiangkai Meng, Xudong Peng, Jinqing Wang
Axial piston pumps with compact structures and high efficiency are widely used in construction machinery. The efficiency and lifetime strongly depend on the tribological performance of the pump’s valve plate pair. To enhance the tribological performance of the valve plate pair, surface textures, and H-DLC coatings were fabricated to modify the CuAl10Fe5Ni5 surfaces. The influences of elliptic textures of different sizes and textured H-DLC coatings on the surface friction and wear properties of the valve plate surface under oil lubrication were evaluated using a ring-on-disk tribometer. The results reveal that the friction and wear properties of the CuAl10Fe5Ni5 surfaces are significantly enhanced by elliptic textures, and the friction coefficient and wear rate of textured CuAl10Fe5Ni5 with E90 are maximally decreased by 95% and 87%, respectively. Compared with the surface textures and H-DLC coatings, the textured H-DLC coating has the greatest ability to reduce wear and adhesion. The wear rate of the textured H-DLC coating is further reduced by 98%. This improvement can be explained by the synergistic effect of the elliptic textures and H-DLC coatings, which are attributed to the reduced contact area, debris capture, and secondary lubrication of the elliptic textures, and increased surface hardness.
轴向柱塞泵结构紧凑、效率高,被广泛应用于工程机械领域。效率和使用寿命在很大程度上取决于泵阀板对的摩擦学性能。为了提高阀板对的摩擦学性能,我们制作了表面纹理和 H-DLC 涂层来修饰 CuAl10Fe5Ni5 表面。使用环盘摩擦磨损仪评估了不同尺寸的椭圆纹理和纹理 H-DLC 涂层对油润滑下阀板表面摩擦和磨损性能的影响。结果表明,椭圆纹理显著提高了 CuAl10Fe5Ni5 表面的摩擦和磨损性能,纹理为 E90 的 CuAl10Fe5Ni5 的摩擦系数和磨损率最大分别降低了 95% 和 87%。与表面纹理和 H-DLC 涂层相比,纹理 H-DLC 涂层的减磨和附着能力最强。纹理 H-DLC 涂层的磨损率进一步降低了 98%。这种改善可以解释为椭圆纹理和 H-DLC 涂层的协同效应,这归因于椭圆纹理减少了接触面积、碎片捕获和二次润滑,并提高了表面硬度。
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引用次数: 0
ULPING-Based Titanium Oxide as a New Cathode Material for Zn-Ion Batteries 基于 ULPING 的氧化钛作为锌-离子电池的新型阴极材料
IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2024-09-09 DOI: 10.3390/coatings14091163
Suben Sri Shiam, Jyotisman Rath, Eduardo Gutiérrez Vera, Amirkianoosh Kiani
The need for alternative energy storage options beyond lithium-ion batteries is critical due to their high costs, resource scarcity, and environmental concerns. Zinc-ion batteries offer a promising solution, given zinc’s abundance, cost effectiveness, and safety, particularly its compatibility with non-flammable aqueous electrolytes. In this study, the potential of laser-ablation-based titanium oxide as a novel cathode material for zinc-ion batteries was investigated. The ultra-short laser pulses for in situ nanostructure generation (ULPING) technique was employed to generate nanostructured titanium oxide. This laser ablation process produced highly porous nanostructures, enhancing the electrochemical performance of the electrodes. Zinc and titanium oxide samples were evaluated using two-electrode and three-electrode setups, with cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge (GCD) techniques. Optimal cathode materials were identified in the Ti-5W (laser ablated twice) and Ti-10W (laser ablated ten times) samples, which demonstrated excellent charge capacity and energy density. The Ti-10W sample exhibited superior long-term performance due to its highly porous nanostructures, improving ion diffusion and electron transport. The potential of laser-ablated titanium oxide as a high-performance cathode material for zinc-ion batteries was highlighted, emphasizing the importance of further research to optimize laser parameters and enhance the stability and scalability of these electrodes.
由于锂离子电池成本高昂、资源稀缺和环境问题,人们迫切需要锂离子电池以外的替代能源存储方案。锌离子电池提供了一种前景广阔的解决方案,因为锌资源丰富、成本效益高且安全,特别是与不易燃的水性电解质兼容。本研究调查了基于激光烧蚀的氧化钛作为锌离子电池新型阴极材料的潜力。研究采用了超短激光脉冲原位纳米结构生成(ULPING)技术来生成纳米结构的氧化钛。这种激光烧蚀过程产生了高多孔性纳米结构,从而提高了电极的电化学性能。利用双电极和三电极设置、循环伏安法 (CV)、电化学阻抗谱 (EIS) 和电静态充放电 (GCD) 技术对锌和氧化钛样品进行了评估。在 Ti-5W (激光烧蚀两次)和 Ti-10W(激光烧蚀十次)样品中确定了最佳阴极材料,这两种材料显示出卓越的电荷容量和能量密度。Ti-10W 样品的多孔纳米结构改善了离子扩散和电子传输,因此表现出卓越的长期性能。激光烧蚀氧化钛作为锌离子电池高性能阴极材料的潜力得到了突显,强调了进一步研究优化激光参数、提高这些电极的稳定性和可扩展性的重要性。
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引用次数: 0
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Coatings
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