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Enhanced erosion resistance of HVOF-deposited laser-textured TiC coating with PTFE 聚四氟乙烯增强hvof沉积激光织形TiC涂层的抗侵蚀性能
4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-09-25 DOI: 10.1080/02670844.2023.2260049
Vikrant Singh, Anil Kumar Singla, Anuj Bansal
ABSTRACTThis research explores the enhanced slurry erosion behaviour of a composite coating comprising Titanium Carbide (TiC) deposited via High Velocity Oxy-Fuel (HVOF) spraying process. The study integrates laser texturing and Polytetrafluoroethylene (PTFE) spraying techniques to improve the coating's performance. TiC coating is applied to SS316 substrates using HVOF, followed by laser surface texturing to create micro-scale circular patterns. A thin layer of PTFE is then sprayed onto the textured surface, enhancing static contact angle and anti-adhesive properties. Slurry erosion tests reveal significant improvements in the coating's resistance. The findings offer promising applications in slurry erosion-prone industries. Further investigations aim to study the erosive mechanism of the different samples and evaluate their long-term performance.KEYWORDS: ErosionTiCHVOFSS316PTFETexturingHardnessToughness Disclosure statementNo potential conflict of interest was reported by the author(s).
摘要本文研究了高速氧-燃料(HVOF)喷涂工艺沉积的碳化钛(TiC)复合涂层增强的浆液侵蚀性能。该研究将激光织构和聚四氟乙烯(PTFE)喷涂技术相结合,以提高涂层的性能。使用HVOF将TiC涂层应用于SS316基板上,然后使用激光表面纹理来创建微尺度的圆形图案。然后在纹理表面喷涂一层薄薄的聚四氟乙烯,增强静态接触角和抗粘接性能。浆液侵蚀试验表明,涂层的耐蚀性显著提高。该研究结果为浆液侵蚀易发行业提供了有希望的应用。进一步的研究旨在研究不同样品的侵蚀机理,并评估其长期性能。关键词:侵蚀tichvofss316ptfetexturinghardnes韧性披露声明作者未报告潜在的利益冲突。
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引用次数: 0
Microstructures and properties of ultrasonically surface-modified Cu–0.2Be–1.0Co alloy 超声表面改性Cu-0.2Be-1.0Co合金的组织与性能
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2253392
Jinyun Wang, Bowen Zhang, Zhenyu Hong, Hongliang Zhao
ABSTRACT Low-Be copper alloys exhibit high thermal and electrical conductivities but weak strength, hardness, wear and corrosion resistances, which limit their practical applications severely. To overcome these defects, we herein systematically investigate the effects of ultrasonic surface modification on the microstructures and properties of Cu–0.2Be–1.0Co alloy. It is found that the gradient microstructures characterized by pile-ups and dents, fine grains, dense dislocations and compressive residual stresses are generated in the 171 μm thickness surface layer of the Cu–0.2Be–1.0Co alloy by ultrasonic surface modification. As a result, the surface hardness obtains a 162% enhancement, the wear rate drops from 5.03 × 10−4 to 3.46 × 10−4 mm3·N−1·m−1, and the electrochemical corrosion current density decreases from 3.24 to 1.92 μA/cm2. These results indicate that the comprehensive properties of Cu–0.2Be–1.0Co alloy can be simultaneously improved by utilizing ultrasonic surface modification.
摘要低Be铜合金具有较高的导热性和导电性,但强度、硬度、耐磨性和耐腐蚀性较差,严重限制了其实际应用。为了克服这些缺陷,我们系统地研究了超声波表面改性对Cu–0.2Be–1.0Co合金组织和性能的影响。研究发现,在171 μm厚的Cu–0.2Be–1.0Co合金表面层。结果,表面硬度提高了162%,磨损率从5.03下降 × 10−4至3.46 × 10−4 mm3·N−1·m−1,电化学腐蚀电流密度从3.24降低到1.92 μA/cm2。这些结果表明,利用超声波表面改性可以同时提高Cu–0.2Be–1.0Co合金的综合性能。
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引用次数: 0
Mechanical optimisation of Ni coatings produced by low-pressure cold spray 低压冷喷涂镍涂层的力学优化
4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2257357
Felice Rubino, David Merino-Millan, Fausto Tucci, Pedro Poza
ABSTRACTNickel-based coatings are widely used as thermal barriers in several sectors thanks to their remarkable corrosion and wear resistance and outstanding stability at high temperatures. Recently, Ni coatings, produced with thermal spraying and vacuum techniques, have been investigated for solar power energy applications. In the present manuscript, low-pressure cold spray (LPCS) was used to deposit pure Nickel onto a steel substrate. The influence of gas temperature, nozzle stand-off distance, and advancing speed on morphological and mechanical properties were studied. The optimal deposition conditions were derived by ANOVA analysis. The hardness and the adhesion strength were approximately 160 HV and 26 MPa, respectively. The highest thickness obtained under the optimised deposition with a single pass was around 900 µm.KEYWORDS: Cold spraycoatingnickelparameter optimisationadhesion strengthhardnessroughnessdesign of experiments Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No, 754382 (https://doi.org/10.3030/754382); by ‘Comunidad de Madrid’ and European Structural Funds under ACES2030-CM project (S2018/EMT-4319); and by Spanish government AEI under grant number PID2020-115508RB-C22 (A3M).
摘要镍基涂料由于其优异的耐腐蚀性和耐磨性以及在高温下的优异稳定性,在许多领域被广泛用作热障。近年来,利用热喷涂和真空技术制备的Ni涂层已被研究用于太阳能发电。在本手稿中,低压冷喷涂(LPCS)用于沉积纯镍到钢基体上。研究了气体温度、喷嘴间隔距离和推进速度对形貌和力学性能的影响。通过方差分析得出最佳沉积条件。硬度和粘接强度分别约为160 HV和26 MPa。在优化的单道沉积下获得的最高厚度约为900µm。关键词:冷喷涂;镍;参数优化;粘附强度;本工作已获得欧盟地平线2020研究和创新计划的资助,Marie Sklodowska-Curie资助协议No . 754382 (https://doi.org/10.3030/754382);“马德里公社”和欧洲结构基金在ACES2030-CM项目(S2018/EMT-4319)下;由西班牙政府AEI资助,资助号PID2020-115508RB-C22 (A3M)。
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引用次数: 0
Tailoring Ti Grade 2 and TNTZ alloy surfaces in a two-step mechanical–chemical modification* 剪裁Ti等级2和TNTZ合金表面在两步机械化学改性*
4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2248707
Agnieszka Kowalczyk, Donata Kuczyńska-Zemła, Agata Sotniczuk, Klaudia Anuszewska, Halina Garbacz
The aim of this work was to improve the surface properties of cp-Ti Grade 2 and β-Ti alloy TNTZ (Ti-29Nb-13Ta-4.6Zr) for biomedical applications. A hybrid surface treatment consisting of shot peening and chemical etching was conducted. Subsequently, the physicochemical properties and topography of the modified surfaces were analysed. Microhardness measurements of the shot-peened samples revealed a great increase in the surface hardness to the similar level as can be achieved for the ultrafine-grained and nanostructured materials. Roughness tests and microscopic observations showed significant topographical differences, depending on the material and modification process involved. Moreover, in this paper we demonstrate the influence of the substrate and treatments on the wettability. Obtained results confirmed that designed hybrid modification of Ti Grade 2 and TNTZ has significant potential for biomedical applications.
本工作的目的是改善cp-Ti 2级和β-钛合金TNTZ (Ti-29Nb-13Ta-4.6Zr)的表面性能,用于生物医学应用。采用喷丸强化和化学腐蚀相结合的复合表面处理方法。随后,对改性后表面的物理化学性质和形貌进行了分析。显微硬度测量表明,喷丸试样的表面硬度大大提高,达到与超细晶和纳米结构材料相似的水平。粗糙度测试和显微观察显示了显著的地形差异,这取决于所涉及的材料和改性过程。此外,本文还论证了基质和处理对润湿性的影响。研究结果证实了所设计的Ti 2级与TNTZ的杂交改性具有显著的生物医学应用潜力。
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引用次数: 0
The potential use of laser cladded functionally graded materials to mitigate degradation in boiler tube heat exchangers for power plant applications: a review 激光包覆功能梯度材料在电厂锅炉管换热器中的潜在用途:综述
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2249653
Joseph B. Morake, J. Mutua, MartinM . Ruthandi, E. O. Olakanmi
ABSTRACT Surface modification is essential to safeguard heat exchangers from premature failure spurred by deterioration mechanisms such as corrosion and wear, which diminish performance. Meanwhile, modifying some substrates with dissimilar materials is challenging due to a mismatch in material properties. Moreover, individual alloy coatings on substrates are usually insufficient in the required material properties, leading to accelerated failure of equipment, especially in power plant industries. This article summarised the knowledge base on functionally graded materials (FGMs) while emphasising how this promising class of novel materials can reduce deterioration. Additionally, laser cladding is established to be a suitable technique for processing FGMs. A particular focus is laid on the laser beam interaction with the FGM and expounding on the processing and material parameters that affect the microstructural properties of FGMs. The development prospects for processing FGMs with superior clad quality characteristics to increase boiler pipes’ service life and performance are also highlighted.
摘要:表面改性对于保护换热器免受腐蚀和磨损等劣化机制引发的过早失效至关重要,这些劣化机制会降低性能。同时,由于材料性能的不匹配,用不同材料修饰一些基底是具有挑战性的。此外,基底上的单个合金涂层通常不具备所需的材料性能,导致设备加速故障,尤其是在发电厂行业。本文总结了功能梯度材料(FGM)的知识库,同时强调了这类有前途的新型材料如何减少退化。此外,激光熔覆被认为是加工FGM的合适技术。重点研究了激光束与FGM的相互作用,阐述了影响FGM微观结构性能的工艺和材料参数。还强调了加工具有优异包层质量特性的FGM以提高锅炉管道的使用寿命和性能的发展前景。
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引用次数: 0
Improving the adhesion of CrN coatings on TC4 alloy substrates by discharge current modulation in magnetron sputtering 磁控溅射中放电电流调制提高TC4合金基体上CrN涂层的附着力
4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2257359
Shuai Xu, Zhuo Zhao, Yanwen Zhou, Kaice Zhang
ABSTRACTThe study reports the formation of multilayer coatings of CrN with variable gradient modulus on TC4 substrate by varying the discharge current of the hot filament in magnetron sputtering. Results show that multilayer CrN/TC4 has a higher critical failure load (63.4 N > 29.7 N), lower maximum tensile stress (103.8 GPa < 134.3 GPa), and a higher ratio of plastic to elastic deformation work (Wp/We, 2.11 > 1.58) than a single layer CrN/TC4. This indicates that the energy absorption ability of the coating/substrate before failure can be improved by increasing the loose energy-absorbing sublayer, thus improving the coating/substrate adhesion. Notably, the wear rate of both multilayer and single-layer coatings is in the order of 10−16 m3/(N·m), demonstrating their excellent wear resistance. Structural engineering enables the application of multilayer CrN coatings on low-modulus and high-strength alloy substrates, such as TC4.HIGHLIGHTS A dense-porous multilayer coating obtained by varying the filament discharge currents.The modulus difference between the multilayer CrN and TC4 reduced.The maximum tensile stress appeared at the interface of the Cr and CrN layers.The multilayer CrN/TC4 with high Wp/We and absorption ability of deformation work.The multilayer CrN/TC4 was with high adhesion and excellent wear resistance.KEYWORDS: Structure engineeringmagnetron sputteringdischarge currentsmultilayer coatingalloy substratesimulationadhesionmodulus Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by National Natural Science Foundation of China [grant number 51972155 and 52271056]; Foundation of Liaoning Educational Administration [grant number LJKZ0278 and LJKZ0306].
摘要本文报道了通过改变磁控溅射热丝的放电电流,在TC4衬底上形成变梯度模量的多层CrN涂层。结果表明:与单层CrN/TC4相比,多层CrN/TC4具有更高的临界破坏载荷(63.4 N > 29.7 N)、更低的最大拉应力(103.8 GPa < 134.3 GPa)和更高的塑性与弹性变形功比(Wp/We, 2.11 > 1.58);这说明通过增加松散的吸能亚层,可以提高失效前涂层/基体的吸能能力,从而提高涂层/基体的附着力。值得注意的是,多层和单层涂层的磨损速率都在10−16 m3/(N·m)量级,表现出优异的耐磨性。结构工程使多层CrN涂层能够应用于低模量和高强度合金基底,如TC4。通过改变灯丝放电电流获得致密多孔多层涂层。多层CrN与TC4的模量差减小。最大拉应力出现在Cr和CrN层的界面处。多层CrN/TC4具有较高的Wp/We和吸收变形的能力。多层CrN/TC4具有高附着力和优异的耐磨性。关键词:结构工程、磁控溅射、放电电流、多层涂层、合金衬底、模拟黏附模量公开声明作者未报告潜在的利益冲突。基金资助:国家自然科学基金项目[批准号:51972155和52271056];辽宁省教育行政基金[批准号:LJKZ0278和LJKZ0306]。
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引用次数: 0
The effect of WC-Co substrates on TiN/TiCN/Al2O3/TiCNO multilayer coatings WC-Co基体对TiN/TiCN/Al2O3/TiCNO多层涂层的影响
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2252660
Yingpu Huang, Lihui Zhu, Zhenyu Liu, Yuanyuan Bian
ABSTRACT In order to determine optimum substrate, TiN/TiCN/Al2O3/TiCNO coatings were deposited on WC-7Co substrate and WC-6Co substrate (named as Coating-7Co and Coating-6Co, respectively), and then the effect of WC-Co substrates on TiN/TiCN/Al2O3/TiCNO multilayer coatings was investigated by comparing the microstructure, hardness, adhesion strength, oxidation resistance and wear resistance of Coating-7Co and Coating-6Co. Results show that WC grain size of WC-6Co substrate is smaller, correspondingly the grain size of each layer in Coating-6Co is smaller, and the surface roughness is lower. Compared with Coating-7Co, Coating-6Co exhibits higher hardness, better plastic deformation capability, better oxidation resistance, lower friction coefficient and better short-period wear resistance. However, because of higher residual tensile stress and lower adhesion strength, the long-period wear resistance of Coating-6Co is worse than Coating-7Co conversely. To make good use of Coating-6Co, some post-deposition treatment techniques that can reduce residual tensile stress and improve adhesion strength should be considered.
为了确定最佳基体,分别在WC-7Co和WC-6Co基体上沉积TiN/TiCN/Al2O3/TiCNO涂层(分别命名为Coating-7Co和Coating-6Co),通过对比镀层的显微组织、硬度、附着强度、抗氧化性和耐磨性,研究了WC-Co基体对TiN/TiCN/Al2O3/TiCNO多层镀层的影响。结果表明:WC- 6co基体WC晶粒尺寸较小,相应的,涂层- 6co中各层WC晶粒尺寸较小,表面粗糙度较低;与涂层- 7co相比,涂层- 6co具有更高的硬度、更好的塑性变形能力、更好的抗氧化性、更低的摩擦系数和更好的短周期耐磨性。然而,由于残余拉伸应力较高,结合强度较低,涂层- 6co的长周期耐磨性反而比涂层- 7co差。为了更好地利用镀层,应考虑采用一些能降低残余拉伸应力、提高附着强度的沉积后处理技术。
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引用次数: 0
Anticorrosive PEO coatings on metallic cast heat enhancers for thermal energy storage 储热用金属铸造增热剂的防腐PEO涂层
4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2236363
Natalia Raźny, Anna Dmitruk, Krzysztof Naplocha
The research aims to determine whether a protective oxide coating obtained by plasma electrolytic oxidation (PEO) will prevent unfavourable changes occurring on the surface of aluminium heat enhancers for thermal energy storage (TES) based on phase change materials (PCMs). For domestic purposes (short-term, solar energy), salt hydrates are widely utilised as PCMs. Their low thermal conductivity makes the application of metal enhancers necessary to improve heat transfer in the unit. Due to the chemically aggressive nature of MgCl2·H2O, aluminium enhancers can be negatively affected during working cycles. PEO was proposed to overcome corrosion issues in the units. Cast samples, coated with PEO for a short time in KOH-Na2SiO3 electrolyte, were subjected to a molten MgCl2·H2O environment. Mass change and the surface were studied via SEM, EDS, and XRD measurements. A thin layer of aluminium oxide prevented castings from changes occurring on the surface of the enhancer.
该研究旨在确定通过等离子体电解氧化(PEO)获得的保护性氧化涂层是否会防止基于相变材料(PCMs)的用于热储能(TES)的铝热增强剂表面发生不利变化。对于家庭用途(短期,太阳能),盐水合物被广泛用作pcm。它们的低导热性使得金属增强剂的应用是必要的,以改善机组的传热。由于MgCl2·H2O的化学腐蚀性,铝增强剂在工作循环中会受到负面影响。PEO的提出是为了克服装置的腐蚀问题。铸态样品在KOH-Na2SiO3电解液中包覆PEO后,置于熔融MgCl2·H2O环境中。通过扫描电镜、能谱仪、x射线衍射仪等测试手段研究了材料的质量变化和表面形貌。一层薄薄的氧化铝防止铸件在增强剂表面发生变化。
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引用次数: 0
Measurement methods and fractal dimensions of blast-cleaned steel substrates 喷砂清理钢基体的测量方法和分形维数
4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2259527
T. Marquardt, A. W. Momber, A. Krenz
ABSTRACTMorphological parameters of steel substrates determine the adhesion of coatings and adhesives. Three different assessment methods (cross section image, contact stylus instrument, and stripe light projection) were applied to blast-cleaned substrates. A total of 12 surface configurations were generated with different abrasive materials. The fractal dimensions were estimated by means of the box-counting method. Design of experiment and ANOVA were applied to statistically analyze the relationships. Factors included abrasive type, surface preparation grade, surface roughness, and surface profile measurement method. Similar relative trends for the fractal dimensions resulted for the three measurement methods. The normalized values of the fractal dimensions were approximately twice as high for the cross section profiles compared to the ones from contact stylus and stripe light projection. Fractal values derived from contact stylus measurements showed the highest repeatability, whereas those derived from cross section images showed the lowest repeatability.KEYWORDS: Cross sectionfractal dimensionprofile impactstripe line projectionstylus instrument Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis study received financial support from the Federal Ministry of Economic Affairs and Energy (BMWi) in Berlin, Germany, through the ‘FoKO-Wind’ project [grant number: 03EE2006A] as part of the ‘7. Energieforschungsprogramm’.
摘要钢基体的形态参数决定了涂层和粘合剂的附着力。采用三种不同的评估方法(横截面图像、接触式触笔仪器和条纹光投影)对喷砂清洁的基材进行了评估。使用不同的磨料,共生成了12种表面构型。分形维数采用盒计数法估计。采用实验设计和方差分析进行统计分析。影响因素包括磨料类型、表面处理等级、表面粗糙度和表面轮廓测量方法。三种测量方法的分形维数的相对趋势相似。分形维数的归一化值约为接触式触笔和条纹光投影的两倍。由触针测量得到的分形值具有最高的可重复性,而由截面图像得到的分形值具有最低的可重复性。关键词:横截面分形维数轮廓冲击条纹线投影触笔仪器披露声明作者未报告潜在利益冲突。本研究得到了德国柏林联邦经济事务和能源部(BMWi)的财政支持,通过FoKO-Wind项目[资助号:03EE2006A]作为2007年德国气候变化研究项目的一部分。Energieforschungsprogramm”。
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引用次数: 1
Cyclic oxidation of slurry silicide-aluminide coatings formed on Ti-6Al-4V alloy Ti-6Al-4V合金表面硅铝化物浆液涂层的循环氧化研究
4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-06-03 DOI: 10.1080/02670844.2023.2257856
Agnieszka Kochmańska, Paweł Kochmański
ABSTRACT A proprietary slurry cementation method was used to produce silicide-aluminide coatings on alloy Ti-6Al-4V. The cementation processes were carried out at 900–1100 °C for 2–6 h. The coatings exhibited a stratified configuration characterised by a phase arrangement that demonstrates favourable attributes pertaining to mechanical and corrosion resistance capabilities, namely, the presence of aluminium-enriched phases at the coating surface and titanium-enriched phases proximity to the substrate. The cyclic oxidation behaviour at 800 °C for 30 twenty-two-hour cycles was investigated. The characterisation of the structure of coatings was carried out through the use of scanning microscopy, X-ray microanalysis, and X-ray diffraction techniques. The coatings have excellent resistance to cyclic oxidation, resulting from the gradient structure and the establishment of a protective alumina layer on the surface. The coatings were characterised by good resistance to thermal shocks. The microcracks formed during thermal shocks were filled with an alumina, which renders the coatings self-healing.
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引用次数: 0
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Surface Engineering
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