首页 > 最新文献

THE Coatings最新文献

英文 中文
Wear Characterization of Chromium PVD Coatings on Polymeric Substrate for Automotive Optical Components 汽车光学元件聚合物基板上铬PVD涂层的磨损特性
Pub Date : 2021-05-08 DOI: 10.3390/COATINGS11050555
A. Baptista, G. Pinto, Francisco J. G. Silva, A. Ferreira, A. Pinto, V. Sousa
The automotive industry is a pioneer in solutions that meet market expectations. However, in the automotive industry, some less environmentally friendly technologies are still used, such as electroplating. Due to legislative restrictions in several countries, thin coatings made in a vacuum have been replacing coatings traditionally made by electroplating, mainly in decorative terms. This work is more focused on the use of these coatings made in vacuum for optical applications, namely on headlights and exterior backlit components. Although these components are protected during the period of use, there may be situations of contact during the assembly of the components or their repair, necessary to safeguard and to ensure that these coatings have the scratch and wear resistance needed to withstand any treatment deficiency during the operations referred to above. Therefore, this work is essentially focused on the study of the wear resistance of Cr coatings made by PVD (Physical Vapour Deposition) on polymeric substrates. To this end, the coatings previously studied have now been subjected to micro-abrasion tests, with a view to assessing their wear resistance. For this purpose, alumina abrasive has been used, and the wear mechanisms observed in the coatings were studied. The abrasion and scratch tests showed that the most stable film has the one provided with 10-layers, showing greater wear resistance as well, greater adhesion to the substrate and less cohesive failures in the performed tests. Given the nature of the substrate and the coating, the results obtained are very promising, showing that these 10-layer Cr thin coatings can overcome any careless operation during manufacturing, assembly and repair processes, when applied in lightning or backlit components in motor vehicles.
汽车行业是满足市场期望的解决方案的先驱。然而,在汽车工业中,一些不太环保的技术仍在使用,如电镀。由于一些国家的立法限制,在真空中制成的薄涂层已经取代了传统上由电镀制成的涂层,主要是在装饰方面。这项工作更侧重于将这些真空涂层用于光学应用,即前照灯和外部背光组件。虽然这些组件在使用期间受到保护,但在组件组装或维修期间可能会出现接触的情况,这是必要的保护,并确保这些涂层具有承受上述操作期间任何处理缺陷所需的划伤和耐磨性。因此,本工作的重点是研究PVD(物理气相沉积)法制备的Cr涂层在聚合物基体上的耐磨性。为此目的,以前研究的涂层现在已经进行了微磨损试验,以评估其耐磨性。为此,采用氧化铝磨料,并对涂层的磨损机理进行了研究。磨损和划伤测试表明,最稳定的薄膜是10层的薄膜,在所进行的测试中表现出更强的耐磨性,对基材的附着力更强,并且更少的内聚失效。考虑到基材和涂层的性质,所获得的结果非常有希望,表明这些10层Cr薄涂层可以克服制造、组装和维修过程中的任何粗心操作,当应用于汽车的闪电或背光组件时。
{"title":"Wear Characterization of Chromium PVD Coatings on Polymeric Substrate for Automotive Optical Components","authors":"A. Baptista, G. Pinto, Francisco J. G. Silva, A. Ferreira, A. Pinto, V. Sousa","doi":"10.3390/COATINGS11050555","DOIUrl":"https://doi.org/10.3390/COATINGS11050555","url":null,"abstract":"The automotive industry is a pioneer in solutions that meet market expectations. However, in the automotive industry, some less environmentally friendly technologies are still used, such as electroplating. Due to legislative restrictions in several countries, thin coatings made in a vacuum have been replacing coatings traditionally made by electroplating, mainly in decorative terms. This work is more focused on the use of these coatings made in vacuum for optical applications, namely on headlights and exterior backlit components. Although these components are protected during the period of use, there may be situations of contact during the assembly of the components or their repair, necessary to safeguard and to ensure that these coatings have the scratch and wear resistance needed to withstand any treatment deficiency during the operations referred to above. Therefore, this work is essentially focused on the study of the wear resistance of Cr coatings made by PVD (Physical Vapour Deposition) on polymeric substrates. To this end, the coatings previously studied have now been subjected to micro-abrasion tests, with a view to assessing their wear resistance. For this purpose, alumina abrasive has been used, and the wear mechanisms observed in the coatings were studied. The abrasion and scratch tests showed that the most stable film has the one provided with 10-layers, showing greater wear resistance as well, greater adhesion to the substrate and less cohesive failures in the performed tests. Given the nature of the substrate and the coating, the results obtained are very promising, showing that these 10-layer Cr thin coatings can overcome any careless operation during manufacturing, assembly and repair processes, when applied in lightning or backlit components in motor vehicles.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"28 1","pages":"555"},"PeriodicalIF":0.0,"publicationDate":"2021-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84441180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Effect of Carrier Gas Flow Field on Chemical Vapor Deposition of 2D MoS2 Crystal 载气流场对化学气相沉积二维二硫化钼晶体的影响
Pub Date : 2021-05-06 DOI: 10.3390/COATINGS11050547
Minyu Bai, Shuai Wen, Jijie Zhao, Yuxuan Du, Fei Xie, Huan Liu
The carrier gas flow field plays a vital role in the chemical vapor deposition (CVD) process of two dimensional (2D) MoS2 crystal, which was studied by simulations and experiments. Different carrier gas flow fields were studied by utilizing three types of precursor carrier which affected the local gas flow field significantly. The experiment results showed that the appropriate precursor vapor concentration could be achieved by local carrier gas flow field conditioning, resulting in single 2D MoS2 crystals of a large size and a high coating rate of 2D MoS2 crystal on the target substrate surface. The carrier gas flow also contributed to the growth of the 2D MoS2 crystal when it flew towards the target surface. The size of deposited single 2D MoS2 crystal reached tens of micrometers and a few layers of 2D MoS2 crystal were characterized and confirmed.
通过模拟和实验研究了载气流场在二维二硫化钼晶体化学气相沉积(CVD)过程中的重要作用。利用三种前驱体载体,研究了不同载体气相流场对局部气相流场的影响。实验结果表明,通过局部载气流场调节,可以获得合适的前驱体蒸气浓度,得到尺寸较大的单晶二维二硫化钼晶体,并在目标衬底表面获得较高的二硫化钼晶体包覆率。载气流动也促进了二维二硫化钼晶体向目标表面的生长。沉积的二维二硫化钼单晶尺寸达到数十微米,并对多层二硫化钼单晶进行了表征和确认。
{"title":"Effect of Carrier Gas Flow Field on Chemical Vapor Deposition of 2D MoS2 Crystal","authors":"Minyu Bai, Shuai Wen, Jijie Zhao, Yuxuan Du, Fei Xie, Huan Liu","doi":"10.3390/COATINGS11050547","DOIUrl":"https://doi.org/10.3390/COATINGS11050547","url":null,"abstract":"The carrier gas flow field plays a vital role in the chemical vapor deposition (CVD) process of two dimensional (2D) MoS2 crystal, which was studied by simulations and experiments. Different carrier gas flow fields were studied by utilizing three types of precursor carrier which affected the local gas flow field significantly. The experiment results showed that the appropriate precursor vapor concentration could be achieved by local carrier gas flow field conditioning, resulting in single 2D MoS2 crystals of a large size and a high coating rate of 2D MoS2 crystal on the target substrate surface. The carrier gas flow also contributed to the growth of the 2D MoS2 crystal when it flew towards the target surface. The size of deposited single 2D MoS2 crystal reached tens of micrometers and a few layers of 2D MoS2 crystal were characterized and confirmed.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"53 1","pages":"547"},"PeriodicalIF":0.0,"publicationDate":"2021-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77927163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Tire/Road Rolling Resistance Modeling: Discussing the Surface Macrotexture Effect 轮胎/道路滚动阻力建模:讨论表面宏观纹理效应
Pub Date : 2021-05-02 DOI: 10.3390/COATINGS11050538
M. Kane, Ebrahim Riahi, M. Do
This paper deals with the modeling of rolling resistance and the analysis of the effect of pavement texture. The Rolling Resistance Model (RRM) is a simplification of the no-slip rate of the Dynamic Friction Model (DFM) based on modeling tire/road contact and is intended to predict the tire/pavement friction at all slip rates. The experimental validation of this approach was performed using a machine simulating tires rolling on road surfaces. The tested pavement surfaces have a wide range of textures from smooth to macro-micro-rough, thus covering all the surfaces likely to be encountered on the roads. A comparison between the experimental rolling resistances and those predicted by the model shows a good correlation, with an R2 exceeding 0.8. A good correlation between the MPD (mean profile depth) of the surfaces and the rolling resistance is also shown. It is also noticed that a random distribution and pointed shape of the summits may also be an inconvenience concerning rolling resistance, thus leading to the conclusion that beyond the macrotexture, the positivity of the texture should also be taken into account. A possible simplification of the model by neglecting the damping part in the constitutive model of the rubber is also noted.
本文对滚动阻力进行建模,并对路面纹理的影响进行了分析。滚动阻力模型(RRM)是对动态摩擦模型(DFM)的无滑移率的简化,该模型基于对轮胎/路面接触的建模,旨在预测轮胎/路面在各种滑移率下的摩擦。通过模拟轮胎在路面上滚动的实验验证了该方法的有效性。测试的路面纹理范围很广,从光滑到宏观-微观粗糙,从而覆盖了道路上可能遇到的所有表面。实验轧辊阻力与模型预测轧辊阻力的相关性较好,R2均大于0.8。表面的平均轮廓深度(MPD)与滚动阻力之间也显示出良好的相关性。还注意到,峰顶的随机分布和尖形也可能给滚动阻力带来不便,从而得出结论,除了宏观织构之外,还应考虑织构的正性。文中还指出了一种通过忽略橡胶本构模型中的阻尼部分来简化模型的可能性。
{"title":"Tire/Road Rolling Resistance Modeling: Discussing the Surface Macrotexture Effect","authors":"M. Kane, Ebrahim Riahi, M. Do","doi":"10.3390/COATINGS11050538","DOIUrl":"https://doi.org/10.3390/COATINGS11050538","url":null,"abstract":"This paper deals with the modeling of rolling resistance and the analysis of the effect of pavement texture. The Rolling Resistance Model (RRM) is a simplification of the no-slip rate of the Dynamic Friction Model (DFM) based on modeling tire/road contact and is intended to predict the tire/pavement friction at all slip rates. The experimental validation of this approach was performed using a machine simulating tires rolling on road surfaces. The tested pavement surfaces have a wide range of textures from smooth to macro-micro-rough, thus covering all the surfaces likely to be encountered on the roads. A comparison between the experimental rolling resistances and those predicted by the model shows a good correlation, with an R2 exceeding 0.8. A good correlation between the MPD (mean profile depth) of the surfaces and the rolling resistance is also shown. It is also noticed that a random distribution and pointed shape of the summits may also be an inconvenience concerning rolling resistance, thus leading to the conclusion that beyond the macrotexture, the positivity of the texture should also be taken into account. A possible simplification of the model by neglecting the damping part in the constitutive model of the rubber is also noted.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"113 1","pages":"538"},"PeriodicalIF":0.0,"publicationDate":"2021-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75012425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Microstructural and Erosive Wear Characteristics of a High Chromium Cast Iron 高铬铸铁的显微组织和冲蚀磨损特性
Pub Date : 2021-05-01 DOI: 10.3390/COATINGS11050490
A. Fortini, A. Suman, Alessandro Vulpio, M. Merlin, M. Pinelli
Surface material loss due to erosive wear is responsible for the increased cost of maintenance and downtime in industries. Hence, hardfacing is one of the most valuable and effective techniques employed to improve the wear resistance of heavy-duty components. The present paper investigates the microstructural and erosive wear characteristics of a hypereutectic high-chromium cast iron, considering the erosion resistance, resulting from the impact of micro-sized particles, of both as-received and heat-treated conditions. Micro-sized particles involve the erosion-resistant characteristics of carbide and matrix, contemporary. Due to this, the enhancement of the matrix strength could improve the mechanical support to withstand cracking deformation and spalling. Accordingly, the effect of a destabilization heat treatment on the microstructure was firstly investigated by hardness tests, X-ray diffraction analyses, optical and scanning electron microscopy. Specifically designed erosive tests were carried out using a raw meal powder at an impingement angle of 90°. The resulting superior wear resistance of the heat-treated samples was relayed on the improved matrix microstructure: consistent with the observed eroded surfaces, the reduced matrix/carbides hardness difference of the heat-treated material is pivotal in enhancing the erosion resistance of the hardfacing. The present results contribute to a better understanding of the microstructure–property relationships concerning the erosive wear resistance.
由于侵蚀磨损导致的表面材料损失是工业维护和停机成本增加的原因。因此,堆焊是提高重型部件耐磨性的最有价值和最有效的技术之一。本文研究了一种过共晶高铬铸铁的显微组织和冲蚀磨损特性,并考虑了在接收和热处理条件下微尺寸颗粒的冲击所产生的抗冲蚀性。微型颗粒涉及到碳化物和基体的抗侵蚀特性,当代。因此,提高基体强度可以提高机械支架的抗开裂变形和剥落能力。因此,首先通过硬度测试、x射线衍射分析、光学显微镜和扫描电镜研究了失稳热处理对微观组织的影响。特别设计的冲蚀试验采用生粉,冲蚀角为90°。热处理样品的优异耐磨性体现在基体微观组织的改善上:与观察到的侵蚀表面一致,热处理材料的基体/碳化物硬度差的减小是增强堆焊抗侵蚀性能的关键。本研究结果有助于更好地理解与耐蚀磨损有关的微观组织-性能关系。
{"title":"Microstructural and Erosive Wear Characteristics of a High Chromium Cast Iron","authors":"A. Fortini, A. Suman, Alessandro Vulpio, M. Merlin, M. Pinelli","doi":"10.3390/COATINGS11050490","DOIUrl":"https://doi.org/10.3390/COATINGS11050490","url":null,"abstract":"Surface material loss due to erosive wear is responsible for the increased cost of maintenance and downtime in industries. Hence, hardfacing is one of the most valuable and effective techniques employed to improve the wear resistance of heavy-duty components. The present paper investigates the microstructural and erosive wear characteristics of a hypereutectic high-chromium cast iron, considering the erosion resistance, resulting from the impact of micro-sized particles, of both as-received and heat-treated conditions. Micro-sized particles involve the erosion-resistant characteristics of carbide and matrix, contemporary. Due to this, the enhancement of the matrix strength could improve the mechanical support to withstand cracking deformation and spalling. Accordingly, the effect of a destabilization heat treatment on the microstructure was firstly investigated by hardness tests, X-ray diffraction analyses, optical and scanning electron microscopy. Specifically designed erosive tests were carried out using a raw meal powder at an impingement angle of 90°. The resulting superior wear resistance of the heat-treated samples was relayed on the improved matrix microstructure: consistent with the observed eroded surfaces, the reduced matrix/carbides hardness difference of the heat-treated material is pivotal in enhancing the erosion resistance of the hardfacing. The present results contribute to a better understanding of the microstructure–property relationships concerning the erosive wear resistance.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"16 1","pages":"490"},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81675882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Synthesis of Cubic Aluminum Nitride (AlN) Coatings through Suspension Plasma Spray (SPS) Technology 悬浮等离子喷涂技术合成立方氮化铝(AlN)涂层
Pub Date : 2021-05-01 DOI: 10.3390/COATINGS11050500
F. Barandehfard, J. Aluha, F. Gitzhofer
Thermal spraying of aluminum nitride (AlN) is a challenging issue because it decomposes at a high temperature. In this work, the use of suspension plasma spray (SPS) technology is proposed for the in situ synthesis and deposition of cubic-structured AlN coatings on metallic substrates. The effects of the nitriding agent, the suspension liquid carrier, the substrate materials and the standoff distance during deposition by SPS were investigated. The plasma-synthesized coatings were analyzed by X-ray diffraction (XRD), optical microscopy (OM) and scanning electron microscopy (SEM). The results show higher AlN content in the coatings deposited on a carbon steel substrate (~82%) when compared to titanium substrate (~30%) or molybdenum (~15%). Melamine mixed with pure aluminum powder produced AlN-richer coatings of up to 82% when compared to urea mixed with the Al (~25% AlN). Hexadecane was a relatively better liquid carrier than the oxygen-rich liquid carriers such as ethanol or ethylene glycol. When the materials were exposed to a molten aluminum–magnesium alloy at 850 °C for 2 h, the corrosion resistance of the AlN-coated carbon steel substrate showed improved performance in comparison to the uncoated substrate.
氮化铝的热喷涂是一个具有挑战性的问题,因为它在高温下分解。在这项工作中,提出了使用悬浮等离子体喷涂(SPS)技术在金属基底上原位合成和沉积立方结构AlN涂层。考察了氮化剂、悬浮液载体、衬底材料和沉淀距离对SPS沉积过程的影响。采用x射线衍射(XRD)、光学显微镜(OM)和扫描电镜(SEM)对等离子体合成涂层进行了分析。结果表明,与钛基(~30%)或钼基(~15%)相比,碳钢基镀层AlN含量(~82%)较高。三聚氰胺与纯铝粉混合,与尿素与Al (~25% AlN)混合相比,产生的富AlN涂层高达82%。十六烷是一种相对较好的富氧液体载体,如乙醇或乙二醇。当材料在850°C的铝镁合金熔液中暴露2h时,镀aln的碳钢基体的耐蚀性能比未镀aln的碳钢基体有所提高。
{"title":"Synthesis of Cubic Aluminum Nitride (AlN) Coatings through Suspension Plasma Spray (SPS) Technology","authors":"F. Barandehfard, J. Aluha, F. Gitzhofer","doi":"10.3390/COATINGS11050500","DOIUrl":"https://doi.org/10.3390/COATINGS11050500","url":null,"abstract":"Thermal spraying of aluminum nitride (AlN) is a challenging issue because it decomposes at a high temperature. In this work, the use of suspension plasma spray (SPS) technology is proposed for the in situ synthesis and deposition of cubic-structured AlN coatings on metallic substrates. The effects of the nitriding agent, the suspension liquid carrier, the substrate materials and the standoff distance during deposition by SPS were investigated. The plasma-synthesized coatings were analyzed by X-ray diffraction (XRD), optical microscopy (OM) and scanning electron microscopy (SEM). The results show higher AlN content in the coatings deposited on a carbon steel substrate (~82%) when compared to titanium substrate (~30%) or molybdenum (~15%). Melamine mixed with pure aluminum powder produced AlN-richer coatings of up to 82% when compared to urea mixed with the Al (~25% AlN). Hexadecane was a relatively better liquid carrier than the oxygen-rich liquid carriers such as ethanol or ethylene glycol. When the materials were exposed to a molten aluminum–magnesium alloy at 850 °C for 2 h, the corrosion resistance of the AlN-coated carbon steel substrate showed improved performance in comparison to the uncoated substrate.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"4 1","pages":"500"},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74161715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Curcumin: Modern Applications for a Versatile Additive 姜黄素:一种多功能添加剂的现代应用
Pub Date : 2021-04-28 DOI: 10.3390/COATINGS11050519
Florentina Monica Raduly, V. Rădițoiu, Alina Raditoiu, V. Purcar
The recent development of several methods for extracting curcumin from the root of the plant Curcuma longa has led to intensified research on the properties of curcumin and its fields of application. Following the studies and the accreditation of curcumin as a natural compound with antifungal, antiviral, and antibacterial properties, new fields of application have been developed in two main directions—food and medical, respectively. This review paper aims to synthesize the fields of application of curcumin as an additive for the prevention of spoilage, safety, and quality of food. Simultaneously, it aims to present curcumin as an additive in products for the prevention of bacterial infections and health care. In both cases, the types of curcumin formulations in the form of (nano)emulsions, (nano)particles, or (nano)composites are presented, depending on the field and conditions of exploitation or their properties to be used. The diversity of composite materials that can be designed, depending on the purpose of use, leaves open the field of research on the conditioning of curcumin. Various biomaterials active from the antibacterial and antibiofilm point of view can be intuited in which curcumin acts as an additive that potentiates the activities of other compounds or has a synergistic activity with them.
近年来从植物姜黄根中提取姜黄素的几种方法的发展,使人们对姜黄素的性质及其应用领域的研究日益深入。随着姜黄素作为一种具有抗真菌、抗病毒和抗菌特性的天然化合物的研究和认可,姜黄素在食品和医疗两个主要方向上有了新的应用领域。本文综述了姜黄素作为食品添加剂在防止变质、提高食品安全和质量等方面的应用领域。同时,它的目的是目前姜黄素作为添加剂的产品,预防细菌感染和保健。在这两种情况下,姜黄素配方的类型以(纳米)乳液、(纳米)颗粒或(纳米)复合材料的形式呈现,这取决于开发的领域和条件或其要使用的性质。根据使用目的,可设计的复合材料的多样性为姜黄素调理的研究开辟了广阔的领域。从抗菌和抗生物膜的角度来看,各种生物材料的活性可以直观地看出,姜黄素作为添加剂,增强其他化合物的活性或与它们具有协同活性。
{"title":"Curcumin: Modern Applications for a Versatile Additive","authors":"Florentina Monica Raduly, V. Rădițoiu, Alina Raditoiu, V. Purcar","doi":"10.3390/COATINGS11050519","DOIUrl":"https://doi.org/10.3390/COATINGS11050519","url":null,"abstract":"The recent development of several methods for extracting curcumin from the root of the plant Curcuma longa has led to intensified research on the properties of curcumin and its fields of application. Following the studies and the accreditation of curcumin as a natural compound with antifungal, antiviral, and antibacterial properties, new fields of application have been developed in two main directions—food and medical, respectively. This review paper aims to synthesize the fields of application of curcumin as an additive for the prevention of spoilage, safety, and quality of food. Simultaneously, it aims to present curcumin as an additive in products for the prevention of bacterial infections and health care. In both cases, the types of curcumin formulations in the form of (nano)emulsions, (nano)particles, or (nano)composites are presented, depending on the field and conditions of exploitation or their properties to be used. The diversity of composite materials that can be designed, depending on the purpose of use, leaves open the field of research on the conditioning of curcumin. Various biomaterials active from the antibacterial and antibiofilm point of view can be intuited in which curcumin acts as an additive that potentiates the activities of other compounds or has a synergistic activity with them.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"33 1","pages":"519"},"PeriodicalIF":0.0,"publicationDate":"2021-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80822761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
Efficient Light Trapping from Nanorod-Like Single-Textured Al-Doped ZnO Transparent Conducting Films 纳米棒状单织构al掺杂ZnO透明导电膜的高效光捕获
Pub Date : 2021-04-27 DOI: 10.3390/COATINGS11050513
Jiang Zhu, Daqiang Hu, Ying Wang, Chunlei Tao, Hongbao Jia, Wenping Zhao
Nanorod-like single-textured Al-doped ZnO (AZO) transparent conducting films were prepared by the simple hydrothermal growth of AZO nanorods on AZO seed layers. The structures, morphologies, optoelectronic properties and light trapping abilities of the AZO films were investigated. The morphological changes of single-textured AZO films depending on growth temperature were shown. Above all, the relation between light trapping abilities and surface morphologies of the single-textured AZO films was studied in detail. The nanorod-like single-textured AZO films prepared at 100 °C exhibited low resistivity, high total transmittance and remarkable enhancement of haze value, which can be acted as transparent electrodes for improving the conversion efficiency of Si-based thin film solar cells.
采用简单水热生长的方法在AZO种子层上制备了类似纳米棒的单织构al掺杂ZnO (AZO)透明导电膜。研究了AZO薄膜的结构、形貌、光电性能和捕光性能。研究了单织构AZO薄膜的形貌随生长温度的变化。首先,详细研究了单织构AZO薄膜的光捕获能力与表面形貌之间的关系。在100℃下制备的纳米棒状单织构AZO薄膜具有电阻率低、总透过率高、雾霾值显著增强等特点,可作为提高硅基薄膜太阳能电池转换效率的透明电极。
{"title":"Efficient Light Trapping from Nanorod-Like Single-Textured Al-Doped ZnO Transparent Conducting Films","authors":"Jiang Zhu, Daqiang Hu, Ying Wang, Chunlei Tao, Hongbao Jia, Wenping Zhao","doi":"10.3390/COATINGS11050513","DOIUrl":"https://doi.org/10.3390/COATINGS11050513","url":null,"abstract":"Nanorod-like single-textured Al-doped ZnO (AZO) transparent conducting films were prepared by the simple hydrothermal growth of AZO nanorods on AZO seed layers. The structures, morphologies, optoelectronic properties and light trapping abilities of the AZO films were investigated. The morphological changes of single-textured AZO films depending on growth temperature were shown. Above all, the relation between light trapping abilities and surface morphologies of the single-textured AZO films was studied in detail. The nanorod-like single-textured AZO films prepared at 100 °C exhibited low resistivity, high total transmittance and remarkable enhancement of haze value, which can be acted as transparent electrodes for improving the conversion efficiency of Si-based thin film solar cells.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"47 1","pages":"513"},"PeriodicalIF":0.0,"publicationDate":"2021-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89011119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating 等离子喷涂MoAlB陶瓷涂层的微观结构与磨损行为
Pub Date : 2021-04-18 DOI: 10.3390/COATINGS11040474
Fuzhu Li, Shengnan Sun, Yonglong Xu, L. Tian, Yun Wang, Zhenying Xu, Ruitao Li
MoAlB ceramic coatings were prepared on a 316 steel surface by atmospheric plasma spraying with different arc power levels. The phase composition, microstructure and wear resistance of coatings against GCr15 and Si3N4 counterparts were studied. The MoAlB ceramic decomposed and was oxidized to form MoB and Al2O3 during plasma spraying. With the increase of the arc power, MoAlB experienced more decomposition, but the coatings became denser. When the arc power increased from 30 to 36 kW, the wear rates of coatings against GCr15 and Si3N4 balls reduced by 91% and 78%, respectively. The characterization of wear tracks shows that when against GCr15 counterparts, the main wear mechanisms are abrasive and adhesive wear, and when against Si3N4 counterparts, fatigue and abrasive wear are dominant. The refinement of wear resistance by increasing arc power can be attributed to the improvement of density and adhesive strength among splats.
采用不同电弧功率的大气等离子喷涂方法在316钢表面制备了MoAlB陶瓷涂层。研究了GCr15和Si3N4涂层的相组成、显微组织和耐磨性。MoAlB陶瓷在等离子喷涂过程中分解氧化生成MoB和Al2O3。随着电弧功率的增大,MoAlB的分解次数增多,镀层密度增大。当电弧功率从30 kW增加到36 kW时,涂层对GCr15和Si3N4球的磨损率分别降低了91%和78%。磨损轨迹表征表明,对GCr15合金的磨损机制以磨粒磨损和黏着磨损为主,对Si3N4合金的磨损机制以疲劳磨损和磨粒磨损为主。通过增加电弧功率来改善耐磨性可以归因于密度和板条之间的粘合强度的提高。
{"title":"Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating","authors":"Fuzhu Li, Shengnan Sun, Yonglong Xu, L. Tian, Yun Wang, Zhenying Xu, Ruitao Li","doi":"10.3390/COATINGS11040474","DOIUrl":"https://doi.org/10.3390/COATINGS11040474","url":null,"abstract":"MoAlB ceramic coatings were prepared on a 316 steel surface by atmospheric plasma spraying with different arc power levels. The phase composition, microstructure and wear resistance of coatings against GCr15 and Si3N4 counterparts were studied. The MoAlB ceramic decomposed and was oxidized to form MoB and Al2O3 during plasma spraying. With the increase of the arc power, MoAlB experienced more decomposition, but the coatings became denser. When the arc power increased from 30 to 36 kW, the wear rates of coatings against GCr15 and Si3N4 balls reduced by 91% and 78%, respectively. The characterization of wear tracks shows that when against GCr15 counterparts, the main wear mechanisms are abrasive and adhesive wear, and when against Si3N4 counterparts, fatigue and abrasive wear are dominant. The refinement of wear resistance by increasing arc power can be attributed to the improvement of density and adhesive strength among splats.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"1 1","pages":"474"},"PeriodicalIF":0.0,"publicationDate":"2021-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78265766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Reliable Ohmic Contact Properties for Ni/Hydrogen-Terminated Diamond at Annealing Temperature up to 900 °C 在高达900°C的退火温度下,Ni/氢气端接金刚石可靠的欧姆接触特性
Pub Date : 2021-04-17 DOI: 10.3390/COATINGS11040470
Xiaolu Yuan, Jiangwei Liu, Jinlong Liu, Junjun Wei, B. Da, Chengming Li, Y. Koide
Ohmic contact with high thermal stability is essential to promote hydrogen-terminated diamond (H-diamond) electronic devices for high-temperature applications. Here, the ohmic contact characteristics of Ni/H-diamond at annealing temperatures up to 900 °C are investigated. The measured current–voltage curves and deduced specific contact resistance (ρC) are used to evaluate the quality of the contact properties. Schottky contacts are formed for the as-received and 300 °C-annealed Ni/H-diamonds. When the annealing temperature is increased to 500 °C, the ohmic contact properties are formed with the ρC of 1.5 × 10−3 Ω·cm2 for the Ni/H-diamond. As the annealing temperature rises to 900 °C, the ρC is determined to be as low as 6.0 × 10−5 Ω·cm2. It is believed that the formation of Ni-related carbides at the Ni/H-diamond interface promotes the decrease in ρC. The Ni metal is extremely promising to be used as the ohmic contact electrode for the H-diamond-based electronic devices at temperature up to 900 °C.
具有高热稳定性的欧姆接触对于促进高温应用的端氢金刚石(H-diamond)电子器件至关重要。本文研究了Ni/ h -金刚石在900℃退火温度下的欧姆接触特性。利用实测的电流-电压曲线和推导出的接触电阻ρC来评价接触性能的好坏。接收态和300℃退火的Ni/ h -金刚石形成肖特基触点。当退火温度提高到500℃时,Ni/ h -金刚石形成欧姆接触性质,ρC为1.5 × 10−3 Ω·cm2。当退火温度升至900℃时,ρC可低至6.0 × 10−5 Ω·cm2。认为Ni/ h -金刚石界面处Ni相关碳化物的形成促进了ρC的降低。镍金属极有希望在高达900°C的温度下用作h -金刚石基电子器件的欧姆接触电极。
{"title":"Reliable Ohmic Contact Properties for Ni/Hydrogen-Terminated Diamond at Annealing Temperature up to 900 °C","authors":"Xiaolu Yuan, Jiangwei Liu, Jinlong Liu, Junjun Wei, B. Da, Chengming Li, Y. Koide","doi":"10.3390/COATINGS11040470","DOIUrl":"https://doi.org/10.3390/COATINGS11040470","url":null,"abstract":"Ohmic contact with high thermal stability is essential to promote hydrogen-terminated diamond (H-diamond) electronic devices for high-temperature applications. Here, the ohmic contact characteristics of Ni/H-diamond at annealing temperatures up to 900 °C are investigated. The measured current–voltage curves and deduced specific contact resistance (ρC) are used to evaluate the quality of the contact properties. Schottky contacts are formed for the as-received and 300 °C-annealed Ni/H-diamonds. When the annealing temperature is increased to 500 °C, the ohmic contact properties are formed with the ρC of 1.5 × 10−3 Ω·cm2 for the Ni/H-diamond. As the annealing temperature rises to 900 °C, the ρC is determined to be as low as 6.0 × 10−5 Ω·cm2. It is believed that the formation of Ni-related carbides at the Ni/H-diamond interface promotes the decrease in ρC. The Ni metal is extremely promising to be used as the ohmic contact electrode for the H-diamond-based electronic devices at temperature up to 900 °C.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"35 1","pages":"470"},"PeriodicalIF":0.0,"publicationDate":"2021-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73283973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure, Mechanical Properties and Tribological Behavior of Magnetron-Sputtered MoS2 Solid Lubricant Coatings Deposited under Industrial Conditions 工业条件下磁控溅射MoS2固体润滑涂层的微观结构、力学性能和摩擦学行为
Pub Date : 2021-04-15 DOI: 10.3390/COATINGS11040455
Armin Seynstahl, Sebastian Krauß, E. Bitzek, B. Meyer, B. Merle, S. Tremmel
Depositing MoS2 coatings for industrial applications involves rotating the samples during the PVD magnetron sputtering process. Here, we show that a 3-fold substrate rotation, along a large target–substrate distance given by the deposition unit, introduces porosity inside the coatings. The mechanical properties and wear behavior strongly correlate with the degree of porosity, which, in turn, depends on the temperature and the rotational speed of the substrate. Ball-on-disk tests and nanoindentation wear experiments show a consistent change in tribological behavior; first, a compaction of the porous structure dominates, followed by wear of the compacted material. Compaction was the main contributor to the volume loss during the running-in process. Compared to a dense coating produced without substrate rotation, the initially porous coatings showed lower hardness and a distinct running-in behavior. Tribological lifetime experiments showed good lubrication performance after compaction.
在工业应用中沉积二硫化钼涂层需要在PVD磁控溅射过程中旋转样品。在这里,我们展示了3倍的基底旋转,沿着沉积单元给出的较大的目标-基底距离,在涂层内部引入孔隙。机械性能和磨损行为与孔隙度密切相关,而孔隙度又取决于基体的温度和转速。球盘磨损试验和纳米压痕磨损试验表明,摩擦摩擦学行为发生了一致的变化;首先,多孔结构的压实占主导地位,其次是压实材料的磨损。压实是磨合过程中体积损失的主要原因。与没有基材旋转的致密涂层相比,初始多孔涂层表现出较低的硬度和明显的磨合行为。摩擦寿命试验表明,压实后的润滑性能良好。
{"title":"Microstructure, Mechanical Properties and Tribological Behavior of Magnetron-Sputtered MoS2 Solid Lubricant Coatings Deposited under Industrial Conditions","authors":"Armin Seynstahl, Sebastian Krauß, E. Bitzek, B. Meyer, B. Merle, S. Tremmel","doi":"10.3390/COATINGS11040455","DOIUrl":"https://doi.org/10.3390/COATINGS11040455","url":null,"abstract":"Depositing MoS2 coatings for industrial applications involves rotating the samples during the PVD magnetron sputtering process. Here, we show that a 3-fold substrate rotation, along a large target–substrate distance given by the deposition unit, introduces porosity inside the coatings. The mechanical properties and wear behavior strongly correlate with the degree of porosity, which, in turn, depends on the temperature and the rotational speed of the substrate. Ball-on-disk tests and nanoindentation wear experiments show a consistent change in tribological behavior; first, a compaction of the porous structure dominates, followed by wear of the compacted material. Compaction was the main contributor to the volume loss during the running-in process. Compared to a dense coating produced without substrate rotation, the initially porous coatings showed lower hardness and a distinct running-in behavior. Tribological lifetime experiments showed good lubrication performance after compaction.","PeriodicalId":22482,"journal":{"name":"THE Coatings","volume":"89 1","pages":"455"},"PeriodicalIF":0.0,"publicationDate":"2021-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72811451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
期刊
THE Coatings
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1