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Influence of scanning strategies on laser-cladded AISI 420 steel 扫描策略对激光熔覆aisi420钢的影响
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-12-02 DOI: 10.1080/02670844.2023.2174656
Jianwen Zhang, Hongmei Zhu, C. Qiu, Longzhang Shen
ABSTRACT In this study, the influence of different laser scanning strategies on substrate deformation, microstructure and properties of laser-cladded thin-walled 420 martensitic stainless steel (MSS) plate have been carefully investigated. The continuous offset-out scanning strategy (COSS) and continuous raster scanning strategy (CRSS) was compared with the subarea offset-out scanning strategies (SOSS) and subarea raster scanning strategy (SRSS) with different sequences. The results show that the minimum and maximum macroscopic deformation was generated using COSS and CRSS, respectively. The temperature distribution with characteristic of quasi-symmetry was generated by COSS, which can largely suppress the substrate deformation, in marked contrast to a long ellipse symmetry by CRSS. All the laser-cladded 420 MSS layers exhibit lath-martensite microstructure, while some cracks are distributed by using SOSS. The optimal comprehensive performance of the laser-cladded 420 MSS can be obtained using COSS, with smallest outermost deformation of 1.57 mm, superior hardness of 54.9 HRC and wear rate of 0.9626 × 10−5 mm3/N·m.
本文研究了不同激光扫描策略对激光熔覆薄壁420马氏体不锈钢(MSS)板基体变形、组织和性能的影响。将连续偏移扫描策略(COSS)和连续光栅扫描策略(CRSS)与不同序列的子区域偏移扫描策略(SOSS)和子区域光栅扫描策略(SRSS)进行了比较。结果表明:采用COSS和CRSS分别产生最小和最大宏观变形;COSS产生了具有准对称特征的温度分布,可以很大程度上抑制衬底变形,与CRSS形成的长椭圆对称形成鲜明对比。激光熔覆的420 MSS层均表现为板条马氏体组织,但存在一定程度的裂纹。激光熔覆420 MSS的综合性能最佳,最外层变形最小为1.57 mm,最高硬度为54.9 HRC,磨损率为0.9626 × 10−5 mm3/N·m。
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引用次数: 0
Interdiffusion and oxidation behaviour of Pt/Ru modified Ni–30Al–0.3Dy coating on Ni3Al-based superalloy Ni3Al基高温合金表面Pt/Ru改性Ni–30Al–0.3Dy涂层的互扩散和氧化行为
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-12-02 DOI: 10.1080/02670844.2023.2182846
Liang Liu, Jian He, Lulu Pan, Xuezhen Cao
ABSTRACT A high purity of Ru or Pt was deliberately deposited as a middle layer between an alumina-forming Ni–30Al–0.3Dy coating and a Ni3Al-based single-crystal superalloy. It was found that the Ru modified Ni–30Al–0.3Dy coating effectively suppressed the interdiffusion between the coating and the substrate and inhibited the precipitation of topologically close-packed (TCP) phases which impaired the mechanical properties of the superalloy. The 1100°C annealing and oxidation tests suggested that, different from Pt, Ru restricted the inward diffusion of Al from the coating to the substrate, thereby hindering the interdiffusion. And the existence of Ru layer can simultaneously improve the oxidation resistance of the coating.
在形成铝的Ni-30Al-0.3Dy涂层和ni3al基单晶高温合金之间故意沉积了高纯的Ru或Pt。结果表明,Ru改性Ni-30Al-0.3Dy涂层有效抑制了涂层与基体之间的相互扩散,抑制了拓扑紧密堆积相(TCP)的析出,从而影响了合金的力学性能。1100℃退火和氧化实验表明,与Pt不同,Ru限制了Al从涂层向基体的内扩散,从而阻碍了Al的互扩散。而Ru层的存在可以同时提高涂层的抗氧化性。
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引用次数: 0
Structural colouration on textile fabrics with thin-film coating via magnetron sputtering: A review 磁控溅射薄膜涂层织物结构着色研究进展
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-12-02 DOI: 10.1080/02670844.2023.2170707
Meilin Huang, Ying-Zhu Wu, Ning-Bo Yi, Sheng-Guo Lu
ABSTRACT An increasing number of textiles is being functionalized using magnetron sputtering. A wide spectrum of colors can be produced by coating thin films on textiles via magnetron sputtering, which reduces pollution issues by bypassing the high requirements of water, chemical dyes, and auxiliary setups of traditional textile dyeing. By covering single-layer, double-layer, or multilayer films with metal, semiconductor, or ceramic targets possessing a particular structure, composition, thickness, and morphology using the magnetron sputtering method, metallic colors or interference structural colors have been successfully produced on textile surfaces. Intelligent, decorative, and practical products use coated colors and other features. Herein, we review the research advancements in textile coloring and applications of colored textiles coated by sputtering, including the sputter deposition technique, color-generating mechanism, and principles of the color regulation of sputtered thin films. The difficulties and future directions for research on colored sputtered thin films in textiles is also summarized.
越来越多的纺织品正利用磁控溅射技术实现功能化。通过磁控溅射在纺织品上涂上薄膜,可以产生广泛的颜色,这绕过了传统纺织品染色对水、化学染料和辅助装置的高要求,减少了污染问题。通过使用磁控溅射方法将具有特定结构、成分、厚度和形态的金属、半导体或陶瓷靶覆盖单层、双层或多层薄膜,在纺织品表面上成功地产生了金属色或干涉结构色。产品具有智能化、装饰性强、实用性强等特点。本文综述了近年来在纺织品着色方面的研究进展和溅射涂层在彩色纺织品上的应用,包括溅射沉积技术、溅射薄膜的变色机理和颜色调节原理。总结了纺织品彩色溅射薄膜研究的难点和未来发展方向。
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引用次数: 0
Enhanced tribological performance and nanostructuring speed on AlTiN by beamshaping technology 通过波束整形技术提高AlTiN的摩擦学性能和纳米结构速度
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-12-02 DOI: 10.1080/02670844.2023.2180855
T. Primus, P. Hauschwitz, T. Vitu, R. Bičišťová, P. Zeman, M. Cimrman, J. Brajer, T. Mocek, M. Smrž
ABSTRACT For the first time, a dynamic beamshaping technology has been utilized for the efficient production of periodic nanostructures on top of AlTiN coating to enable dry machining without costly and environmentally hazardous cutting fluids. First, a variety of periodic nanostructures with periods in a range of 740–273 nm were produced utilizing different wavelengths. Additionally, beamshaping technology increased productivity by 4008% up to 105 cm2 min−1 by shaping the Gaussian beam into a rectangular beam of 500 × 30 µm. To simulate the application load and resulting heat production during manufacturing, friction analysis was performed at room and elevated temperature to 500°C. The analysis revealed a significant reduction in the friction coefficient – up to 27% and 19% at room temperature and 500°C, respectively. The combination of these results demonstrates that the proposed method can be scaled up for the mass production of functionalized machining tools for dry machining.
摘要动态波束成形技术首次被用于在AlTiN涂层上高效生产周期性纳米结构,从而实现干式加工,而无需昂贵且对环境有害的切削液。首先,周期在740–273之间的各种周期性纳米结构 利用不同的波长产生nm。此外,光束整形技术通过将高斯光束整形为500的矩形光束,将生产率提高了4008%,最高可达105 cm2 min−1 × 30 µm。为了模拟制造过程中的应用负载和由此产生的热量,在室温和500°C的高温下进行摩擦分析。分析显示,摩擦系数显著降低——在室温和500°C下分别高达27%和19%。这些结果的结合表明,所提出的方法可以大规模生产用于干式加工的功能化加工工具。
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引用次数: 1
Adhesion behaviour of borided AISI 4140 steel 硼化AISI 4140钢的粘附性能
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-12-02 DOI: 10.1080/02670844.2023.2180856
R. Márquez-Cortés, J. Martínez-Trinidad, R. A. García-León
ABSTRACT In this study, the adhesion behaviour of the borided AISI 4140 steel was estimated. A di-iron boride layer (Fe2B = ∼22 µm) was obtained on the surface of the AISI 4140 steel preheated at 773 K for 30 min to prevent thermal shock; afterwards, the samples were exposed to 1173 K for 30 min. The scratch tests were developed over the surface of the Fe2B/substrate system using a Rockwell-C diamond indenter with a normal force increasing from 0.5–80 N. The friction coefficient behaviour and the residual depth values were measured considering the scratch length that was monitored during the test, according to the ASTM C1624 standard procedure. Critical loads were determined through the combination of the normal force and visual inspection over the worn surface with cracks (cohesive failure) or detachment (adhesive failure) and are explained according to the mechanical properties of the Fe2B/substrate system.
摘要在本研究中,评估了硼化AISI 4140钢的粘附行为。硼化二铁层(Fe2B = ∼22 µm)在773下预热的AISI 4140钢的表面上获得 K表示30 min,以防止热冲击;之后,样品暴露在1173 K表示30 min。根据ASTM C1624标准程序,使用Rockwell C金刚石压头在Fe2B/基底系统的表面上进行划痕试验,法向力从0.5–80 N增加。考虑到试验期间监测的划痕长度,测量摩擦系数行为和残余深度值。临界载荷是通过法向力和目视检查相结合的方法确定的,磨损表面有裂纹(内聚失效)或脱落(粘合失效),并根据Fe2B/基体系统的机械性能进行解释。
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引用次数: 0
PECVD barrier coating systems on post-consumer recyclates for food contact applications PECVD屏障涂层系统的消费后回收食品接触应用
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-12-02 DOI: 10.1080/02670844.2023.2181258
Lara Kleines, Thomas Blasius, R. Dahlmann
ABSTRACT As using recyclates in the food sector is currently severely restricted due to the risk of harmful contamination, the reuse of PCR (Post-Consumer Recyclates) could be greatly increased through the development of migration barriers. However, the deposition of functional barrier coatings in PECVD processes (Plasma-Enhanced Chemical Vapour Deposition) on thermoformed PCR polypropylene cups is non-trivial due to complex geometries and difficult surface properties (high roughness, non-polarity, fluctuation of recycylate properties). To develop barriers in this system, material properties of recyclate and virgin material were compared by rheometric and thermal analysis and surface properties of PCR and virgin material cups were analysed morphologically in order to define specific coating challenges. Subsequently, coatings were deposited by PECVD consisting of both, silicon organic intermediate layers (SiOCH) and silicon oxide barrier layers (SiOx). The barrier, measured by the oxygen transmission rate, could be improved by a factor of about 60 compared to uncoated cups.
由于有害污染的风险,目前在食品部门使用回收物受到严格限制,因此通过迁移障碍的发展,可以大大增加PCR(消费后回收物)的再利用。然而,在PECVD工艺(等离子体增强化学气相沉积)中,由于复杂的几何形状和困难的表面特性(高粗糙度、非极性、回收性能波动),在热成型PCR聚丙烯杯上沉积功能屏障涂层并非易事。为了在该系统中建立屏障,通过流变学和热分析比较了回收材料和原始材料的材料特性,并对PCR和原始材料杯的表面特性进行了形态学分析,以确定具体的涂层挑战。随后,通过PECVD沉积由硅有机中间层(SiOCH)和硅氧化物阻挡层(SiOx)组成的涂层。通过测量氧气传输速率,这种屏障可以比没有涂层的杯子提高约60倍。
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引用次数: 0
The chemical process for materials deposition in aqueous solution: a review 材料在水溶液中沉积的化学过程综述
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-12-02 DOI: 10.1080/02670844.2023.2187883
A. Oliva, I. González-Chan, P. Várguez, A. I. Trejo-Ramos, A. I. Oliva-Avilés
ABSTRACT The material deposition in aqueous solution, also known as chemical bath deposition (CBD), is a well-established technique for the fabrication of semiconducting thin films. The success of the CBD technique is mainly based on the relatively easy implementation and operation requirements. The CBD has importantly contributed to the development of sensors, optical devices and solar cells applications. In this review, the origins and current state of the art of the CBD technique, the involved physicochemical processes, the growing mechanisms, and the analytical techniques for the estimation of optimal physicochemical conditions for the film deposition are discussed. Emphasis on authors’ experience on CBD of CdS, ZnS, Zn(OH)2, and ZnO films are here highlighted, following methodologies for a high control of the deposited materials, such as the species distribution diagrams and the solubility curves.
摘要水溶液中的材料沉积,也称为化学浴沉积(CBD),是一种成熟的半导体薄膜制备技术。CBD技术的成功主要基于相对容易的实现和操作要求。CBD为传感器、光学设备和太阳能电池应用的发展做出了重要贡献。在这篇综述中,讨论了CBD技术的起源和现状,所涉及的物理化学过程,生长机制,以及估计薄膜沉积最佳物理化学条件的分析技术。本文强调了作者在CdS、ZnS、Zn(OH)2和ZnO膜的CBD方面的经验,遵循了对沉积材料进行高度控制的方法,如物种分布图和溶解度曲线。
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引用次数: 0
Multilevel Varying Coefficient Spatiotemporal Model. 多层次可变系数时空模型。
IF 0.7 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-12-01 Epub Date: 2021-11-19 DOI: 10.1002/sta4.438
Yihao Li, Danh V Nguyen, Esra Kürüm, Connie M Rhee, Sudipto Banerjee, Damla Şentürk

Over 785,000 individuals in the U.S. have end-stage renal disease (ESRD) with about 70% of patients on dialysis, a life-sustaining treatment. Dialysis patients experience frequent hospitalizations. In order to identify risk factors of hospitalizations, we utilize data from the large national database, United States Renal Data System (USRDS). To account for the hierarchical structure of the data, with longitudinal hospitalization rates nested in dialysis facilities and dialysis facilities nested in geographic regions across the U.S., we propose a multilevel varying coefficient spatiotemporal model (M-VCSM) where region- and facility-specific random deviations are modeled through a multilevel Karhunen-Loéve (KL) expansion. The proposed M-VCSM includes time-varying effects of multilevel risk factors at the region- (e.g., urbanicity and area deprivation index) and facility-levels (e.g., patient demographic makeup) and incorporates spatial correlations across regions via a conditional autoregressive (CAR) structure. Efficient estimation and inference is achieved through the fusion of functional principal component analysis (FPCA) and Markov Chain Monte Carlo (MCMC). Applications to the USRDS data highlight significant region- and facility-level risk factors of hospitalizations and characterize time periods and spatial locations with elevated hospitalization risk. Finite sample performance of the proposed methodology is studied through simulations.

在美国,超过 78.5 万人患有终末期肾病 (ESRD),其中约 70% 的患者需要接受维持生命的透析治疗。透析患者经常住院治疗。为了确定住院的风险因素,我们利用了大型国家数据库美国肾脏数据系统(USRDS)中的数据。为了考虑到数据的分层结构(纵向住院率嵌套于透析机构,透析机构嵌套于美国各地的地理区域),我们提出了多层次变化系数时空模型(M-VCSM),通过多层次卡胡宁-洛埃夫(KL)扩展对地区和机构的特定随机偏差进行建模。所提出的 M-VCSM 包括多层次风险因素在地区(如城市化和地区贫困指数)和设施(如患者人口构成)层面的时变效应,并通过条件自回归(CAR)结构纳入跨地区的空间相关性。通过融合功能主成分分析(FPCA)和马尔可夫链蒙特卡罗(MCMC),实现了高效的估计和推断。该方法在 USRDS 数据中的应用突出了重要的地区和设施级住院风险因素,并描述了住院风险升高的时间段和空间位置。通过模拟研究了所提方法的有限样本性能。
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引用次数: 0
Evaluating surface smoothness of composite film of well-dispersed silica particles 良好分散二氧化硅颗粒复合膜表面光滑度的评价
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-09-02 DOI: 10.1080/02670844.2022.2162284
Quanyue Wen, Fumiya Tanahashi, M. Fuji
ABSTRACT The surface smoothness of a composite film of polyimide and silica particles was evaluated by changing the dielectric constant based on the gap between the film surface and electrode surface. The silica particles were modified by different treatments, then mixed with the polyimide to prepare the particle composite films. The experimental results showed that even in the films with well-dispersed particles, a more suitable dispersion state exists based on the surface roughness. Moreover, an increase in the surface smoothness of the film will increase the dielectric constant of the composite films. The feasibility of this new evaluation method was confirmed after evaluating films with different smoothness and the results of the film surface smoothness scans were compared. This method allows for a fast, large-scale determination of samples and is independent of the film transparency.
摘要通过根据聚酰亚胺和二氧化硅颗粒复合膜表面和电极表面之间的间隙改变介电常数来评估其表面光滑度。通过不同的处理方法对二氧化硅颗粒进行改性,然后与聚酰亚胺混合制备颗粒复合膜。实验结果表明,即使在颗粒分散良好的薄膜中,基于表面粗糙度也存在更合适的分散状态。此外,膜的表面光滑度的增加将增加复合膜的介电常数。在评估了具有不同光滑度的薄膜并比较了薄膜表面光滑度扫描的结果后,证实了这种新评估方法的可行性。这种方法可以快速、大规模地测定样品,并且与薄膜透明度无关。
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引用次数: 0
Surface properties and biocompatibility studies on bone plate by magnetorheological finishing 磁流变整理骨板表面性能及生物相容性研究
IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Pub Date : 2022-09-02 DOI: 10.1080/02670844.2022.2154006
Atul Singh Rajput, M. Das, S. Kapil
ABSTRACT Bone plates are essential for providing mechanical support during the healing of bone fractures by adapting to the biochemical environment. The surface quality of bone plates plays a vital role in their sustainability under adverse conditions. Magnetorheological Finishing (MRF) is an advanced surface finishing process that provides high surface finishing without disturbing the polished surface topography. However, while mapping to the workspace has a hole or pocket feature, the Magnetorheological (MR) fluid is not stable and gets trapped inside. Hence, a Feature-based hybrid MRF planning system is developed to overcome the challenge during MRF. The final average surface roughness (Ra) value of 21.56 nm from its initial roughness value of 324.12 nm is achieved on the polished surface bone plate made of Ti–6Al–4V. The enhancement in the surface characteristics of the MRF polished surface leads to the biomaterial's enhanced wear and corrosion resistance.
骨板通过适应生物化学环境,在骨折愈合过程中提供机械支持是必不可少的。骨板的表面质量对其在恶劣条件下的可持续性起着至关重要的作用。磁流变抛光(MRF)是一种先进的表面抛光工艺,在不影响抛光表面形貌的情况下提供高表面光洁度。然而,虽然映射到工作空间具有孔或口袋特征,但磁流变(MR)流体不稳定,并被困在其中。为此,开发了一种基于特征的混合磁流变规划系统来克服磁流变过程中的挑战。Ti-6Al-4V磨光表面骨板的平均表面粗糙度(Ra)由初始粗糙度值324.12 nm最终达到21.56 nm。MRF抛光表面表面特性的增强导致生物材料的耐磨性和耐腐蚀性增强。
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引用次数: 3
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Surface Engineering
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