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Analysis of adhesion strength and residual stresses developed by the EDC process EDC工艺的粘接强度和残余应力分析
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-04-03 DOI: 10.1080/02670844.2023.2233256
V. Kumaran, B. Muralidharan
ABSTRACT This paper reports the effect of coating thickness on adhesive properties, and residual stresses by the electric discharge coating (EDC) process on Mg alloy with copper (Cu) nickel (Ni) powder metallurgical (P/M) electrodes. The composite coating layer thickness was measured by optical microscope and it ranges from 10.2 to 102.4 µm. The coating layer was characterized by a Field emission scanning microscope (FESEM) and Energy-dispersive spectroscopy (EDS). X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses were made to identify the chemical composition and functional group. Residual stresses were evaluated by an ETA diffractometer and it revealed that compressive residual stress increases with a range of −458 ± 118 MPa to −1078 ± 125 MPa and tensile residual stresses decrease from 656 ± 113 MPa to 27 ± 11 MPa. The critical load is measured by scratch test. The result shows the adhesive strength of the coated surface was improved with an increase in layer thickness.
摘要本文报道了涂层厚度对铜(Cu)镍(Ni)粉末冶金(P/M)电极镁合金表面放电涂层(EDC)工艺的粘附性能和残余应力的影响。通过光学显微镜测量复合涂层厚度,其范围为10.2至102.4 µm。用场发射扫描显微镜(FESEM)和能谱仪(EDS)对涂层进行了表征。通过X射线衍射(XRD)和傅立叶变换红外光谱(FTIR)对其化学成分和官能团进行了鉴定。残余应力通过ETA衍射仪进行评估,结果显示压缩残余应力在−458范围内增加 ± 118 MPa至−1078 ± 125 MPa,拉伸残余应力从656降低 ± 113 MPa至27 ± 11 MPa。通过划痕试验测量临界载荷。结果表明,涂层表面的粘合强度随着层厚度的增加而提高。
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引用次数: 0
Biological fouling and corrosion resistance of Ni-based coating on AH32 AH32表面ni基涂层的生物结垢及耐腐蚀性能
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-04-03 DOI: 10.1080/02670844.2023.2233258
Zhiwei Su, Yanwen Zhou, Yan Caibo, Zhang Kaice
ABSTRACT To reduce the destruction of organic biological fouling in marine steel, nickel-based (NiCrAlY) transition coatings with and without silver (Ag) doping were prepared on AH32 marine steel by plasma spraying. The coatings exhibited a layered structure, and AlNi3 (111), (200), and (220) diffraction peaks were detected. The Ag (111) peaks were also observed for the Ag-doped coatings. The number of sulphate-reducing bacteria (SRB) adsorbed on the coating surfaces reduced after immersion in the bacterial solution, and their shells were disintegrated because of the presence of Ag. The corrosion potentials of AH32, NiCrAlY, and NiCrAlY(Ag) coated AH32 plates were nearly identical at approximately −720 mV. After being covered with organic paint, the corrosion potential and current density of the NiCrAlY(Ag) coating increased to −624 mV and decreased by one order of 2.75 × 10− 6 A cm−2, respectively. The NiCrAlY(Ag) coating effectively inhibited biological fouling.
摘要为了减少船用钢中有机生物结垢的破坏,采用等离子喷涂法在AH32船用钢上制备了含银和不含银的镍基(NiCrAlY)过渡涂层。涂层表现出层状结构,并且检测到AlNi3(111)、(200)和(220)衍射峰。对于Ag掺杂的涂层,也观察到Ag(111)峰。吸附在涂层表面的硫酸盐还原菌(SRB)的数量在浸入细菌溶液后减少,并且由于Ag的存在,它们的外壳被分解。AH32、NiCrAlY和NiCrAlY(Ag)涂层的AH32板的腐蚀电位几乎相同,约为−720 mV。用有机涂料覆盖后,NiCrAlY(Ag)涂层的腐蚀电位和电流密度增加到−624 mV,并降低了2.75的一个数量级 × 10−6 A. cm−2。NiCrAlY(Ag)涂层有效地抑制了生物结垢。
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引用次数: 0
HVOF Deposition, comparative investigation and optimum selection of molybdenum, boron, chromium, and titanium in Iron amorphous composite coatings 钼、硼、铬、钛在铁非晶复合镀层中的HVOF沉积、对比研究及优化选择
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-04-03 DOI: 10.1080/02670844.2023.2233263
R. Sharma, R. Das, S. Kumar
ABSTRACT The current investigation focuses on the comparative assessment of each alloying element such as titanium, chromium, boron, and molybdenum on mechanical and solid particle erosion behaviour of Iron amorphous composite coatings. Iron amorphous composite coatings were deposited on 316L steel. Based on mechanical and erosion properties, the ranking of the alloying element was derived using the Fuzzy analytic hierarchy process (FAHP) and Grey relational analysis (GRA). Eight different series of Iron-based composite coatings with varying alloying elements were deposited on 316L steel. The results indicated that titanium showed the maximum hardness and adhesion pull-off strength, boron showed maximum fracture toughness, Molybdenum indicated the lowest porosity and chromium indicated maximum corrosion resistance. The result of FAHP + GRA concluded that the ranking of Fe amorphous composite coatings followed the order as FeCSiMoBCr10Ti (C-2)> FeCSiMoBCr5Ti (C-1) FeCSiMo10BCrTi (C-6)> > FeCSiMo5BCrTi (C-5)> FeCSi10MoBCrTi (C-8) > FeCSiMoB10CrTi (C-4) > FeCSi5MoBCrTi (C-7) > FeCSiMoB5CrTi (C-3).
摘要当前的研究重点是比较评估钛、铬、硼和钼等每种合金元素对铁非晶复合涂层的机械和固体颗粒侵蚀行为的影响。在316L钢上沉积了铁-非晶态复合涂层。根据合金的力学性能和侵蚀性能,采用模糊层次分析法(FAHP)和灰色关联分析法(GRA)对合金元素进行了排序。在316L钢上沉积了八种不同系列的含不同合金元素的铁基复合涂层。结果表明,钛表现出最大的硬度和粘附-剥离强度,硼表现出最大断裂韧性,钼表现出最低的孔隙率,铬表现出最高的耐腐蚀性。FAHP的结果 + GRA得出的结论是,Fe非晶复合涂层的排列顺序为FeCSiMoBCr10Ti(C-2)>FeCSiMoBCr5Ti(C-1)FeCSiMo10BCrTi(C-6)> > FeCSiMo5BCrTi(C-5)>FeCSi10MoBCrTi(C-8) > FeCSiMoB10CrTi(C-4) > FeCSi5MoBCrTi(C-7) > FeCSiMoB5CrTi(C-3)。
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引用次数: 2
Effect of bias voltages on microstructure and mechanical properties of (AlCrNbSiTi)N high entropy alloy nitride coatings deposited by arc ion plating 偏压对电弧离子镀(AlCrNbSiTi)N高熵合金氮化物涂层组织和力学性能的影响
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-04-03 DOI: 10.1080/02670844.2023.2236829
Jie Liu, Xiangyu Zhang, X. Zeng, Zechang Xiong, Y. Liu, Yan Lei, Bing Yang
ABSTRACT (AlCrNbSiTi)N coatings were prepared by arc ion plating at a bias voltage in the range of −50 to −200 V. The as-deposited coatings were all found to have a face-centred cubic structure and exhibit columnar crystal. Si3N4 is distributed in the columnar grains in the form of a network, which separates the columnar grains into fine grains. Si3N4 presents a crystalline state and grows coherently with the surrounding grains to form a nc-(AlCrNbTi)N/nc-Si3N4 nanocomposite structure. The coating with the finest mechanical characteristics was applied at −200 V. The hardness, elastic modulus and wear rate are 34.76, 425 GPa and 0.82 × 10−9 mm3 N−1  m−1, respectively. Based on the outstanding mechanical performance of the coating, it is concluded that the (AlCrNbSiTi)N protective coating has a broad range of potential applications.
摘要在−50至−200的偏压下,通过电弧离子镀制备了(AlCrNbSiTi)N涂层 V.发现所沉积的涂层均具有面心立方结构并呈现柱状晶体。Si3N4以网络的形式分布在柱状晶粒中,将柱状晶粒分离成细小晶粒。Si3N4呈现结晶状态,并与周围晶粒相干生长以形成nc-(AlCrNbTi)N/nc-Si3N4纳米复合材料结构。具有最佳机械特性的涂层在−200 五、硬度、弹性模量和磨损率分别为34.76425 GPa和0.82 × 10−9 mm3 N−1 m−1。基于涂层优异的力学性能,认为(AlCrNbSiTi)N保护涂层具有广泛的潜在应用前景。
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引用次数: 0
Long-term oxidation of MoSi2-modified HfB2–SiC–Si/SiC–Si coating at 1700°C mosi2改性HfB2-SiC-Si / SiC-Si涂层在1700℃下的长期氧化
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-03-04 DOI: 10.1080/02670844.2023.2223454
Wu Ding, Lei Zhou, Jiaping Zhang, Q. Fu
ABSTRACT Slurry impregnation and gaseous Si infiltration were effectively used to produce compact MoSi2-doped Si–HfB2–SiC/Si–SiC (HMSS/SS) coatings with a thickness of 250 μm to protect carbon fibre reinforced carbon (Cf/C) composites from oxygen corrosion at 1700°C. The HMSS/SS coating obtained with a mosaic structure makes it possible to protect Cf/C composites at 1700°C for 276 h and the mass reduction is only 0.99%. The pinning effect of the embedded hafnia, the generated MoB together with the Hf, Mo co-doped Si-based glass layer, which successfully prevented the migration of oxygen, was attributed to the superior oxidation protection ability of the HMSS/SS coatings. This work provides a practical method for successfully extending the service life of Cf/C composites in the aerospace industry.
摘要浆料浸渍和气体硅渗透有效地用于制备厚度为250μm的MoSi2掺杂Si–HfB2–SiC/Si–SiC(HMS/SS)涂层,以保护碳纤维增强碳(Cf/C)复合材料在1700°C下免受氧腐蚀。采用镶嵌结构获得的HMSS/SS涂层可以在1700°C下保护Cf/C复合材料276 h,质量还原率仅为0.99%。嵌入的铪、生成的MoB以及Hf、Mo共掺杂的Si基玻璃层的钉扎效应成功地阻止了氧的迁移,这归因于HMSS/SS涂层优异的抗氧化能力。这项工作为航空航天工业中成功延长Cf/C复合材料的使用寿命提供了一种实用的方法。
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引用次数: 1
Wear and corrosion behaviour of the cryogenically treated tungsten carbide coatings 低温处理碳化钨涂层的磨损和腐蚀行为
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-03-04 DOI: 10.1080/02670844.2023.2218204
A. Govande, B. Ratna Sunil, R. Dumpala
ABSTRACT The WC–12Co coatings were deposited on SS 410 substrates using a high-velocity oxygen fuel (HVOF) process and the coatings were heat-treated at 750°C for 1 h in argon environment. Further, the coatings were subjected to cryogenic treatment for 1, 2, 8 and 24 h, and its influence on the reciprocating sliding wear and corrosion characteristics was studied. The structural changes in the coatings after post-treatment were assessed by X-ray diffraction analysis and Raman spectroscopy. Microhardness was improved for cryogenically treated coatings due to the α-Co transformation into ϵ-Co. Cryogenic treatment duration was not having a significant effect on the microhardness values. However, the specific wear rate was influenced by the cryogenic treatment duration. Also, corrosion resistance was increased with the increased cryogenic treatment duration. The protective layers consisting of WO3 and Co3O4 phases formed during the cryogenic treatment are attributed to the improved corrosion resistance of the coatings.
摘要采用高速氧燃料(HVOF)工艺在SS 410基底上沉积WC–12Co涂层,并在750°C下对涂层进行1 h。此外,对涂层进行深冷处理1、2、8和24 h、 研究了其对往复滑动磨损和腐蚀特性的影响。通过X射线衍射分析和拉曼光谱评估后处理后涂层的结构变化。低温处理涂层的显微硬度由于α-Co转变为ε-Co而得到改善。低温处理时间对显微硬度值没有显著影响。然而,比磨损率受到深冷处理持续时间的影响。耐腐蚀性也随着深冷处理时间的增加而增加。在低温处理过程中形成的由WO3和Co3O4相组成的保护层归因于涂层的耐腐蚀性的提高。
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引用次数: 0
Plasma nitriding effects in fatigue behaviour of the welded 4340 steel 等离子体氮化对焊接4340钢疲劳性能的影响
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-03-04 DOI: 10.1080/02670844.2023.2218208
P. Garcia, A. Cardoso, R. Chales, B. B. Almeida
ABSTRACT Welding is one of the major assembly processes employed in most common aeronautical applications. However, the consequences of the thermal cycle might be detrimental to the material’s fatigue resistance depending strongly on the resulting microstructure. The 4340 steel is known to present temper embrittlement, which greatly reduces its fatigue life and weldability. This work proposes plasma nitriding as an alternative solution to tempering as a post-weld treatment and investigates its effects on material’s hardness and fatigue life. This analysis was complemented by microstructural and fracture surface characterization. Plasma nitriding resulted in the formation of a double layer consisting of a smaller white micrometric nitride layer at the surface and a more diffuse sub-superficial region which led to better fatigue behaviour when compared with the conventional tempering treatment. The achieved higher surface hardness might also be interesting in other applications such as those involving high erosion and wear.
摘要焊接是最常见的航空应用中使用的主要装配工艺之一。然而,热循环的后果可能对材料的抗疲劳性有害,这在很大程度上取决于所产生的微观结构。众所周知,4340钢存在回火脆化,这大大降低了其疲劳寿命和可焊性。这项工作提出了等离子体氮化作为回火焊后处理的替代方案,并研究了其对材料硬度和疲劳寿命的影响。该分析得到了微观结构和断裂表面特征的补充。等离子体氮化导致在表面形成由较小的白色微米氮化物层和更扩散的亚表面区域组成的双层,与传统回火处理相比,这导致了更好的疲劳行为。所获得的更高的表面硬度在其他应用中也可能是令人感兴趣的,例如涉及高侵蚀和磨损的应用。
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引用次数: 0
Superhydrophobic DTMS/rGO-nanocomposites modified polyurethane sponge for efficient oil–water separation 超疏水DTMS/ rgo纳米复合材料改性聚氨酯海绵高效油水分离
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-03-04 DOI: 10.1080/02670844.2023.2217599
Ji Li, Junfeng Lu, Tian C. Zhang, Shaojun Yuan
ABSTRACT Dodecyltrimethoxysilane (DTMS)-modified reduced graphene oxide (rGO) nanocomposites were incorporated into polyurethane (PU) sponges by a combination of dip-coating and thermal curing reduction reaction to obtain a novel superhydrophobic DTMS-rGO-PU sponge for effective oil/water separation. The reaction conditions, such as the dip-coating solution concentration, the thermal curing reduction temperature, and the reaction time were demonstrated to be key factors in forming hierarchical DTMS-rGO nanocomposites, which significantly affected the surface wettability of the PU sponge. The resulting DTMS-rGO-PU sponge with a static water contact angle (WCA) of 152.2° displayed superior superhydrophobicity, and achieved an oil–water separation efficiency of 99.89% for various oil/water mixtures. This superhydrophobic sponge also showed minimal deterioration in its high oil adsorption capacity after 100 recycled adsorption operations. Furthermore, the as-prepared DTMS-rGO-PU sponge was proven to be physically and chemically stable and durable in harsh environmental conditions, suggesting its potential for industrial applications in oil spillage management.
采用浸涂和热固化还原反应相结合的方法,将十二烷基三甲氧基硅烷(DTMS)修饰的还原氧化石墨烯(rGO)纳米复合材料掺入聚氨酯(PU)海绵中,制备了一种新型的超疏水性DTMS-rGO-PU海绵,用于有效的油水分离。结果表明,浸涂溶液浓度、热固化还原温度和反应时间是形成层次化DTMS-rGO纳米复合材料的关键因素,对PU海绵的表面润湿性有显著影响。所得DTMS-rGO-PU海绵的静水接触角(WCA)为152.2°,表现出优异的超疏水性,对各种油水混合物的油水分离效率达到99.89%。经过100次循环吸附操作后,超疏水海绵的高吸油能力也表现出最小的下降。此外,制备的DTMS-rGO-PU海绵在恶劣环境条件下具有物理化学稳定性和耐用性,表明其在石油泄漏管理方面的工业应用潜力。
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引用次数: 0
Investigation of the tribochemical reaction mechanism in dry-type CMP of 6H-SiC substrate 6H-SiC衬底干式CMP摩擦化学反应机理的研究
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-03-04 DOI: 10.1080/02670844.2023.2223452
Z. Li, Zhichao Qi, Tian-Dong Zhang, Zhankui Wang, J. Su
ABSTRACT In this paper, the tribochemical reaction mechanism between solid powder and 6H-SiC substrate was investigated. White light interferometer was used to detect surface roughness, FESEM was used to observe surface characteristics, EDS was used to detect surface elements and XRD was used to detect surface components. The tribochemical reaction mechanism of the reduced iron powder, anhydrous sodium carbonate and deionized water with 6H-SiC was analysed by the detection results. It is found that the reduced iron powder, anhydrous sodium carbonate and deionized water react with the 6H-SiC surface to form a soft interfacial transition layer which can be removed. The removal rate of the reduced iron powder is the highest at 191 nm h–1. The surface quality decreases after polishing with the anhydrous sodium carbonate. The results of this study provide a new idea for the field of ultra-precision machining.
本文研究了6H-SiC基片与固体粉末的摩擦化学反应机理。白光干涉仪用于检测表面粗糙度,FESEM用于观察表面特性,EDS用于检测表面元素,XRD用于检测表面成分。根据检测结果分析了还原铁粉、无水碳酸钠和去离子水与6H-SiC的摩擦化学反应机理。研究发现,还原铁粉、无水碳酸钠和去离子水与6H-SiC表面反应形成了可去除的软界面过渡层。还原铁粉的去除率最高,为191 纳米 h–1.用无水碳酸钠抛光后,表面质量下降。研究结果为超精密加工领域提供了新的思路。
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引用次数: 0
Influences of Sc(NO3)3 on characteristics of micro-arc oxidation coatings Sc(NO3)3对微弧氧化涂层性能的影响
IF 2.8 4区 材料科学 Q2 Physics and Astronomy Pub Date : 2023-03-04 DOI: 10.1080/02670844.2023.2212948
Shaolan Yang, Ping Wang, Jiwei Liu
ABSTRACT Micro-arc oxidation (MAO) coatings were fabricated on 2195 aluminium-lithium alloy substrate, using a silicate and phosphate electrolyte with variable scandium nitrate (Sc(NO3)3) concentrations. The properties of the coatings were analysed by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical workstation. The comprehensive analysis demonstrates that adding proper amount of Sc(NO3)3 increased the oxidation voltage, which transformed the worm shape discharge micropores into round-hole shape, and the MAO coatings presented a double-layer structure. The primary phase composition of the coatings was γ-Al2O3, α-Al2O3, Sc2O3 and Al3Sc. The optimum concentration of Sc(NO3)3 was 0.6 g L−1. The hardness reached a maximum value of (1284 ± 43.5) HV, which was about 2.5 times higher than that without adding. The self-corrosion current density reduced from 138.00 × 10− 7 A cm−2 (substrate) to 3.65 ×  10− 7 A cm−2, which was approximately two orders of magnitude lower, indicating that the corrosion resistance was improved.
采用扫描电子显微镜(SEM)、x射线衍射仪(XRD)、x射线光电子能谱仪(XPS)和电化学工作站对涂层的性能进行了分析。综合分析表明,加入适量的Sc(NO3)3可以提高氧化电压,使氧化膜的蜗杆状放电微孔转变为圆孔状放电微孔,氧化膜呈现双层结构。涂层的主要相组成为γ-Al2O3、α-Al2O3、Sc2O3和Al3Sc。Sc(NO3)3的最佳浓度为0.6 g L−1。硬度最大值为(1284±43.5)HV,是未添加时的2.5倍左右。自腐蚀电流密度从138.00 × 10−7 A cm−2(衬底)降低到3.65 × 10−7 A cm−2,降低了约2个数量级,表明耐蚀性得到了提高。
{"title":"Influences of Sc(NO3)3 on characteristics of micro-arc oxidation coatings","authors":"Shaolan Yang, Ping Wang, Jiwei Liu","doi":"10.1080/02670844.2023.2212948","DOIUrl":"https://doi.org/10.1080/02670844.2023.2212948","url":null,"abstract":"ABSTRACT Micro-arc oxidation (MAO) coatings were fabricated on 2195 aluminium-lithium alloy substrate, using a silicate and phosphate electrolyte with variable scandium nitrate (Sc(NO3)3) concentrations. The properties of the coatings were analysed by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical workstation. The comprehensive analysis demonstrates that adding proper amount of Sc(NO3)3 increased the oxidation voltage, which transformed the worm shape discharge micropores into round-hole shape, and the MAO coatings presented a double-layer structure. The primary phase composition of the coatings was γ-Al2O3, α-Al2O3, Sc2O3 and Al3Sc. The optimum concentration of Sc(NO3)3 was 0.6 g L−1. The hardness reached a maximum value of (1284 ± 43.5) HV, which was about 2.5 times higher than that without adding. The self-corrosion current density reduced from 138.00 × 10− 7 A cm−2 (substrate) to 3.65 ×  10− 7 A cm−2, which was approximately two orders of magnitude lower, indicating that the corrosion resistance was improved.","PeriodicalId":21995,"journal":{"name":"Surface Engineering","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43012926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Surface Engineering
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