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On the rumpling mechanism in nanocrystalline coatings:Improved by reactive magnetron sputtering with oxygen

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Journal of Materials Science & Technology 2023年第1期132卷 69-80页

作者： Bo Meng Jinlong Wang lanlan yang Minghui Chen Shenglong Zhu Fuhui Wang Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

Surface rumpling is detrimental to high temperature protective coatings as it shortens their lifetime and leads to adhesion losses and unexpected corrosion *** driving force and mass transport mechanism behind of rumpling remains to be *** the present investigation,we subjected two types of nanocrystalline coating systems to avoid the influence of interdiffusion on rumpling *** group was an ordinary nanocrystalline coating,and the other group was designed and prepared with trace oxygen by reactive magnetron *** cyclic oxidation test at 1100°C was also car-ried *** show the ordinary nanocrystalline coating oxidized rapidly,which leads to the fast consumption of Al and the acceleration of phase transition in the ***,severe surface rumpling is observed due to the stress release of nanocrystals through plastic ***,the reactive doping of oxygen can significantly reduce the consumption process of Al in nanocrystalline *** rumpling is controlled due to the improvement of coefficient of thermal expansion and Young’s modulus of the ***,the cyclic oxidation resistance is improved.

关键词： High temperature oxidation Thermal cycling oxidation Surface rumpling Nanocrystalline coating Residual stress

Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation

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Journal of Materials Science & Technology 2020年第10期42卷 49-58页

作者： lanlan yang Minghui Chen Jinlong Wang Yanxin Qiao Pingyi Guo Shenglong Zhu Fuhui Wang School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China Institute of Metal Research Chinese Academy of ScienceShenyang 110016China

MCrAlY(M=Ni and/or Co)overlay coating is widely used as a protective coating against high temperature oxidation and ***,due to its big difference in chemical composition with the underlying superalloy,elements interdiffusion occurs *** of the direct results is the formation of interdiffusion zone(IDZ)and secondary reaction zone(SRZ)with a high density of fine topological closed-packed phases(TCPs),weakening dramatically the mechanical properties of the alloy *** is by now the main problem of modern high-temperature metallic coatings,but there are still hardly any reports studying the formation,growth and transformation of IDZ and SRZ in deep,as well as the precipitation of *** this work,a typical NiCrAlY coating is deposited by arc ion plating on a single-crystal superalloy *** interdiffusion between them and its relationship on microstructure were *** rather than Al from the coating diffuses into the alloy at high temperatures and segregates immediately beneath their interface,contributing largely to the formation of ***,diffusion of Ni from the deep alloy to IDZ leads to the formation and continuous expansion of SRZ.

关键词： Single-crystal superalloys NiCrAlY coating High-temperature oxidation Arcion plating Elements interdiffusion Microstructure

Water vapor effects on the oxidation resistance of modified potassium silicate coating at high temperature

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Journal of Materials Science & Technology 2024年第9期176卷 25-35页

作者： Yao Du Zheng Chen Yiliang Lu Cheng Wang lanlan yang Shenglong Zhu Fuhui Wang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co.Ltd.Beijing102209China Jiangsu JITRI Road Engineering Technology and Equipment Research Institute Co. Ltd.Xuzhou220005China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang212003China Shenyang National Laboratory for Materials Science Shenyang110016China School of Materials Science and Engineering Northeastern UniversityShenyang110819China

An inorganic potassium silicate coating with pigments of alumina,aluminum phosphate,NiCrAlY and copper chromite black was prepared on CB2 stainless *** behavior in either ambient air or O_(2)+H_(2) O mixture at 630℃ for 2000 h was comparatively studied,and the coating exhibited excellent resistance under both test *** water vapor considerably accelerated the oxidation of the uncoated CB2 steel,as the hydroxide,the main constituent of the coating,had a negligible evaporation rate at test temperature,while it had a limited effect on the coated ***,the existence of coating may prolong or eliminate the incubation period in the O_(2)+H_(2) O mixture at 630℃.After oxidation,the coating matrix is in an amorphous state and fillers as alumina and copper chromite black are stable in the ***(KAlSi_(2) O_(6))formed by Al from NiCrAlY and potassium silicate in the coatings was detected after tests either in O_(2) or O_(2)+H_(2) O mixture.

关键词： CB2 stainless steel Inorganic silicate coating TEM High-temperature corrosion Oxidation

Retarding the effect of Ta on high-temperature oxidation of sputtered nanocrystalline coatings

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Journal of Materials Science & Technology 2024年第17期184卷 195-206页

作者： Bo Meng lanlan yang Qunchang Wang Jinlong Wang Minghui Chen Shenglong Zhu Fuhui Wang Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

The presence of excess Ta in high-temperature protective coatings can compromise the integrity of the Al_(2)O_(3)scale on the surface,which has a negative impact on the oxidation behavior and reduces the service *** effects of oxygen doping on the isothermal oxidation of three sputtered nanocrystalline coatings were investigated at 1100°*** results indicated that oxygen doping inhibited the diffusion of Ta from the coating to the oxide scale,which was primarily attributed to the preferential oxidation of the Al in the ***,excess oxygen doping decreased the amount of Al available for the formation of the Al_(2)O_(3)scale on the coating,thus reducing the inhibitory effect on Ta ***,doping with excess O caused spalling of the oxide ***,the right balance in O doping is crucial for suppressing Ta oxidation while maintaining the integrity of the oxide scale.

关键词： High-temperature oxidation Oxygen doping Nanocrystalline coating Ta-rich phase Residual stress

Nanocrystalline coatings on superalloys against high temperature oxidation: A review

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Corrosion Communications 2021年第1期1卷 58-69页

作者： Jinlong Wang Minghui Chen lanlan yang Wenyao Sun Shenglong Zhu Fuhui Wang Shenyang National Laboratory for Materials Science Northeastern University School of Materials Science and Engineering Jiangsu University of Science and Technology Institute of Metal Research Chinese Academy of Sciences

To enhance oxidation resistance for industry applications, aluminides and overlaying MCrAlY or intermetallic β-NiAl coatings are the commonly used high temperature protective coatings for superalloys. However, they all face a serious problem with regard to interdiffusion with the underlying superalloy substrates. Since the sputtered microcrystalline coating of superalloy K38G for the purpose of oxidation protection was firstly reported in 1992,extensive studies have been conducted on its extension and application for different substrate materials, such as superalloys and intermetallic compounds. In addition to good oxidation protection, sputtered nanocrystalline coatings avoid interdiffusion with the alloy substrates. A more attractive merit of sputtered nanocrystalline coating is that due to the columnar structure, the thermal or growth stresses transported from oxide scale will be easily relaxed by deformation of the nanocrystalline coating, rather than by cracking of the oxide scale. This paper reviews recent progress on nanocrystalline coatings formed on substrates from poly-crystal to single-crystal *** focus is to uptake the mechanisms of high temperature protective properties and to introduce microstructural and functional changes of nanocrystalline coatings.

关键词： Superalloy Metal coating Hot corrosion Oxidation

Electrochemical Hydrogen Charging on Corrosion Behavior of Ti-6Al-4V Alloy in Artificial Seawater

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 296-308页

作者： Yanxin Qiao Yue Qin Huiling Zhou lanlan yang Xiaojing Wang Zhengbin Wang Zhenguang Liu Jiasheng Zou School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China yangzhou Changelight Co. LtdYangzhou 225012China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

This study employs advanced electrochemical and surface characterization techniques to investigate the impact of electrochemical hydrogen charging on the corrosion behavior and surface film of the Ti-6Al-4V *** findings revealed the formation ofγ-TiH andδ-TiH_(2) hydrides in the alloy after hydrogen *** hydrogen charging resulted in more significant degradation of the alloy microstructure,leading to deteriorated protectiveness of the surface *** trend was further confirmed by the electrochemical measurements,which showed that the corrosion resistance of the alloy progressively worsened as the hydrogen charging time was ***,this work provides valuable insights into the mechanisms underlying the corrosion of Ti-6Al-4V alloy under hydrogen charging conditions.

关键词： Ti-6Al-4V alloy Hydrogen charging Electrochemical corrosion Passive film

Effect of aging treatment on microstructure and corrosion behavior of a Fe-18Cr-15Mn-0.66N stainless steel

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Journal of Materials Science & Technology 2022年第12期107卷 197-206页

作者： Yanxin Qiao Xinyi Wang lanlan yang Xiaojing Wang Jian Chen Zhengbin Wang Huiling Zhou Jiasheng Zou Fuhui Wang School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Laboratory for Corrosion and Protection Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China

The effect of aging treatment on the microstructure and corrosion behavior of a Fe-18Cr-15Mn-0.66N high-nitrogen stainless steel(HNSS) in 3.5 wt.% Na Cl solution was investigated using a series of electrochemical tests, scanning electronic microscopy(SEM), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The results showed that the aging treatment led to the precipitation of CrN particles along the grain boundaries and their morphologies changed from dispersive particles to continuous network as the aging time increased up to 60 min. Aging time had minor effects on the corrosion potential and corrosion current density, but resulted in the sharp decrease in the pitting corrosion *** passive film behaved as a n-type semiconductor, and the donor density of the passive film increased with the aging time. Meanwhile, the fraction of stable oxide(CrO) in the passive film decreased with the aging time. It demonstrates that the aging treatment deteriorated the protectiveness of the passive film, hence weakened the corrosion resistance of HNSS.

关键词： High-nitrogen stainless steel Corrosion Aging treatment Passive film

Advanced cellulose-based materials toward stabilizing zinc anodes

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Science China Chemistry 2024年第5期67卷 1465-1484页

作者： Zhijiang Li Xiang Chen Rui Zhang Taoyi Shen Jianchao Sun Zhongce Hu Lin Li lanlan yang Hou-Yong Yu College of Textile Science and Engineering(International Institute of Silk) Zhejiang Sci-Tech UniversityHangzhou 310018China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China School of Environment and Material Engineering Yantai UniversityYantai 264005China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Rechargeable aqueous zinc metal batteries(RAZMBs) have received extensive attention for large-scale energy storage systems due to the merits of Zn anodes, including moderate volumetric and gravimetric energy density, low redox potential, abundant reserve, low cost and impressive intrinsic safety. However, Zn anodes suffer from a series of adverse reactions(dendrite growth,hydrogen evolution, and surface passivation) resulting in low Coulombic efficiency, large polarization, and unsatisfied cycling performance, which inevitably hinder the wide application of RAZMBs. To address the above issues, cellulose-based materials are widely used for Zn anode protection because of their unique physical and chemical properties and other advantages such as biocompatibility, non-toxicity, degradability and easy extraction. In order to better understand the current progress in cellulosebased materials for the Zn anode protection, we have classified and summarized the relevant literatures. In this review, we summarize and elaborate the causes of poor reversibility for Zn anodes, including dendrite formation, hydrogen evolution, and surface passivation. Subsequently, the effective strategies(anode interfacial engineering, gel electrolyte optimization, and separator modification) of cellulose-based materials toward stabilizing Zn anodes are overviewed. In the end, the existing challenges and prospects of cellulose-based materials in Zn anode protection are summarized to shed light on future work.

关键词： Zn anode cellulose anode interfacial engineering gel electrolyte optimization separator modification

Cryoablation Combined with TACE for Treating Large Hepatocellular Carcinoma： Tumor Load and Cellular Immunity

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Chinese Journal of Clinical Oncology 2005年第6期2卷 842-848页

作者： Haipeng Yu lanlan yang Zhi Guo Wenge Xin Fang Liu Xiuying Guo Baoguo Li Department of Interventional Therapy Cancer Institute ＆ Hospital of TianjinMedical University Tianjin 300060China. Department of Digestive Medicine TheSecond Hospital of Jilin UniversityChangchun 130041 China.

OBJECTIVE To study the effectiveness on the tumor load and cellular immune function of percutaneous cryoablation （argon-helium cryoablative system, AHCS） combined with transarterial chemoembolization （TACE） for treating large hepatocellular carcinomas （HCCs） with diameters over 10 ca. METHODS A total of 48 HCC patients were treated with AHCS after TACE. Tumor sizes ranged from 10 to 14 cm. All cases were a hypervascular type. There were 38 Child A cases and 10 Child B cases. Forty were AFP positive and 8 negative. The patients were randomized with therapy group consisting of 26 cases and the control group 22 cases. The therapy group received AHCS 4 weeks following TACE treatment. Reexamination included pathology, tumor markers, T-lymphocyte subgroup levels and computed tomography or MRI. The necrosis rate of the tumor load was calculated by Cavalieri＇s theory. EORTC QLQ-C30 was used in quality of life evaluation. RESULTS The average tumor-load reduction rate （necrosis rate） was 8.07% after TACE, and 28.65% after AHCS. Coagulation necrosis was produced in the target area. The tumor markers deceased significantly after AHCS. Tumor-load reduction after AHCS was more significant than after TACE. Suppression of cellular immunity after TACE was significant. In contrast, CD3^＋, CD4^＋ and NK increased after AHCS and an abnormal T-lymphocyte distribution was corrected. Quality of life after AHCS increased according to the EORTC QLQ-C30 evaluation. No severe complications occurred. CONCLUSION Percutaneous AHCS cryoablation after TACE reduced the tumor load in the short term. At the same time, cellular immune function was increased after AHCS. TACE was critical in increasing the therapeutic efficacy of AHCS because of its embolisation of blood vessels preventing a Flow Effect. Reduction of the tumor load in the short term may conduce to increase cellular immunity. Percutaneous AHCS cryoablation combined with TACE can reduce the tumor load, improve cellular immunity and increas

关键词： cryoablation transarterial chemoembolization tumor load cellular immunity hepatocellular carcinoma.