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SSRN 2022年

作者： Liang, Jian Miao, Bin Xiong, Ziliu Zhang, Lingling Su, Huhu Shen, Chunguang Kuang, Shuang Zheng, Shijian Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and Engineering Hebei University of Technology Tianjin300401 China HBIS Material Technology Research Institute HBIS Group Hebei Province Shijiazhuang050023 China Technology research center HBIS Tang Steel Hebei Province Tang Shan063016 China

Continuous hot-dip galvanizing is an important process for dual phase (DP) steel and other advanced high-strength steels (AHSSs). During this process, the formation of a Fe-Al inhibition layer and the selective oxidation of alloying elements will change the interfacial layer structure, and affect the galvanized coating structure. So far, the interfacial layer structure and its relationship with galvanized coating in high-Al low-Si DP steel are still unclear. In this paper, the interfacial layer and galvanized coating of hot-dip galvanized high-Al low-Si DP steel were characterized by electron microscopy. The results showed that there exists abundant nano-size MnO phases and new Fe 2 Al 5 Zn 0.2 phase s inside the interfacial layer, and the galvanized coating consists of Fe 3 Zn 10 nanophases and η-Zn phases. The competitive relationship between those interfacial phases strongly affects the phase distribution inside the galvanized coating close to the interfacial layer. The MnO phases in the interfacial layer hinder the nucleation and growth of Fe 2 Al 5 Zn 0.2 phases. As a result, the inhibition of the Fe-Zn reaction is weakened and the final galvanized coating exhibited a three-dimensional nested distribution of coexistence of Fe 3 Zn 10 nanophases and η-Zn phases . © 2022, The Authors. All rights reserved.

关键词： High resolution transmission electron microscopy

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Oxidation behavior of single crystal TMS-82+ superalloy in air

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中国有色金属学会会刊：英文版 2007年第A01期17卷 136-140页

作者：武英宋桂明周少雄 T.NARITA Central Iron and Steel Research Institute Advanced Technology and Materials Co Ltd Beijing 100081China Research Group of Interface Control Engineering Graduate School of EngineeringHokkaido UniversityKita-13Nishi-8Kita-kuSapporo 060-8628Japan Fundamentals of Advanced Materials Delft University of TechnologyKluyverweg 12629 HS DelftNetherlands

The oxidation behavior of the single crystal Ni-based superalloy TMS-82+ was studied under cyclic condition at 900 and 1 000 ℃ for 200 h in air. The oxidation kinetics for the superalloy at both exposure temperatures was explained by the subparabolic relationship. The results show that increasing the exposure temperature from 900 to 1 000 ℃,the amounts of α-Al2O3,(Ni,Co)Al2O4 and NiCr2O4 increase,resulting in a higher mass gain. The oxides consist of(Ni,Co)O,CrTaO4,AlTaO4,Cr2O3,θ-,-α-Al2O3 and(Ni,Co)Al2O4 in the specimen at 900 ℃,but NiCr2O4 spinel forms for the specimen exposed at 1 000 ℃ except the above mentioned oxides. A continuous α-Al2O3 layer is responsible for a slow growth rate of the scale after an initial rapid oxidation of NiO.

关键词：单晶体镍氧化行为微观结构

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Fabrication of electrochemical micro-reactor by photon rupture method and electrochemistry

Fabrication of electrochemical micro-reactor by photon ruptu...

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206th Electrochemical Society Meeting

作者： Sakairi, Masatoshi Yamada, Masashi Takahashi, Hideaki Research Group of Interface Control Engineering Molecular Chemistry Graduate School of Engineering Hokkaido University Kita-13 Nishi-8 Kita-ku Sapporo 060-8628 Japan

ISBN: (纸本)1566774748

Photon rupture with a focused single pulse of pulsed YAG-laser irradiation was used to fabricate electrochemical micro-reactor. Porous type anodic oxide film formed specimens were irradiated in solutions with a pulsed Nd-YAG laser beam through a convex lens to fabricate micro channels, micro-electrode and through holes for solution inlet and outlet. During irradiation, specimens were moved by computer controlled XYZ stage. After irradiation, surface of micro-channel and through hole were formed oxide film and it of micro-electrode was formed Au layer by electrochemically. Calculated volume of the micro-reactor including micro-channel and through holes is about 1.5 μl. A cyclic voltammogram of the micro-electrochemical cell was measured in 2 mol/m 3 and 20 mol/m3 K3Fe(CN)6 / K 4Fe(CN)6 at static condition at different scanning rate. Anodic and cathodic peak current were measured and these values were depended on scanning rate and ions concentration.

关键词： Chemical reactors

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The role of bond coat in advanced thermal barrier coating

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International Conference on New Frontiers of Process Science and engineering in Advanced Materials, PSEA' 04

作者： Narita, Toshio Hayashi, Shigenari Lang, Fengqun Thosin, Kemas Zaini Research Group of Interface Control Graduate School of Engineering Hokkaido University Kita-13 Nishi-8 Kita-Ku Sapporo 060-8628 Japan

ISBN: (纸本)0878499806

A novel diffusion barrier bond coat with a duplex layer structure, a sigma phase Re-Cr-Ni barrier and Ni aluminides as an aluminum reservoir was formed on a Ni based superalloy (TMS 82+) and Hastelloy X. The oxidation behavior of both alloys with and without the sigma- Re-Cr-Ni -phase as a diffusion barrier was investigated at temperatures of 1373K (Hastelloy X) and 1423K (TMS-82+) for up to 360ks. It was found that the Re-Cr-Ni acts as a difusion barrier for both inward diffusion of Al and outward diffusion of alloying elements in the alloy substrate.

关键词： Thermal barrier coatings

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Electrochemical noise study on galvanic corrosion of anodized aluminum in chloride environments

Electrochemical noise study on galvanic corrosion of anodize...

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Corrosion and Corrosion control in Saltwater Environments II - Proceedings of the International Symposium

作者： Sakairi, Masatoshi Shimoyama, Ukiya Takahashi, Hideaki Research Group of Interface Control Engineering Molecular Chemistry Graduate School of Engineering Hokkaido University Kita-13 Nishi-8 Kita-ku Sapporo 060-8628 Japan

Aluminum and aluminum alloys are usually used after surface treatment, namely anodizing which formed a barrier type or a porous type oxide film. The effect of the anodic oxide film structure on galvanic corrosion of aluminum was examined by electrochemical noise analysis technique in chloride ion containing solutions. As the thickness of both types of anodic oxide film increased, the incubation period of localized corrosion became longer. The power spectrum density of potential and impedance of electrochemical noise decreased with immersion time. The impedance of porous type anodic oxide films were larger than that of the barrier type anodic oxide film.

关键词： Corrosion

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Interdiffusion behavior of Pt-modified γ-Ni+γ′-Ni₃Al alloys coupled to Ni-Al-based alloys

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METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 2005年第7期36A卷 1769-1775页

作者： Hayashi, S Wang, W Sordelet, DJ Gleeson, B the Research Group of Interface Control Engineering Graduate School of Engineering Hokkaido University 060-8628 Sapporo Japan the State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Sciences 110016 Shenyang P.R. China Present address: the Department of Materials Science and Engineering Iowa State University 50011 Arnes IA

The effect of platinum addition on the interdiffusion behavior of gamma-Ni + gamma'-Ni3Al alloys was studied by using diffusion couples comprised of a Ni-Al-Pt alloy mated to a Ni-Al, Ni-Al-Cr, or Ni-based commercial alloy. The commercial alloys studied were CMSX-4 and CMSX-10. Diffusion annealing was at 1150 degrees C for up to 100 hours. An Al-enriched gamma'-layer often formed in the interdiffusion zone of a given couple during diffusion annealing due to the uphill diffusion of Al. This uphill diffusion was ascribed to Pt addition decreasing the chemical activity of aluminum in the gamma + gamma', alloys. For a given diffusion couple end member, the thickening kinetics of the gamma' layer that formed increased with increasing Pt content in the Ni-Al-Pt gamma + gamma' alloy. The gamma'-layer thickening kinetics in diffusion couples with Cr showed less of a dependence on Pt concentration. Inference of a negative effect of Pt and positive effect of Cr on the Al diffusion in this system enabled explanation of the observed interdiffusion behaviors. There was no or minimal formation of detrimental topologically close-packed (TCP) phases in the interdiffusion zone of the couples with CMSX-4 or CMSX- 10. An overlay Pt-modified gamma + gamma' coating on CMSX-4 showed excellent oxidation resistance when exposed to air for 1000 hours at 1150 degrees C. Moreover, the Al content in the coating was maintained at a relatively high level due to Al replenishment from the CMSX-4 substrate.

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Interdiffusion behavior of Pt-modified γ-Ni + γ'-Ni 3Al alloys coupled to Ni-Al-based alloys

Interdiffusion behavior of Pt-modified γ-Ni + γ'-Ni 3Al al...

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作者： Hayashi, Shigenari Wang, Wen Sordelet, Daniel J. Gleeson, Brian Department of Materials Science and Engineering Iowa State University Research Group of Interface Control Engineering Graduate School of Engineering Hokkaido University Sapporo 060-8628 Japan Department of Materials Science and Engineering Iowa State University State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Department of Materials Science and Engineering Iowa State University Ames IA 50011

The effect of platinum addition on the interdiffusion behavior of γ-Ni + γ'-Ni3Al alloys was studied by using diffusion couples comprised of a Ni-Al-Pt alloy mated to a Ni-Al, Ni-Al-Cr, or Ni-based commercial alloy. The commercial alloys studied were CMSX-4 and CMSX-10. Diffusion annealing was at 1150°C for up to 100 hours. An Al-enriched γ'-layer often formed in the interdiffusion zone of a given couple during diffusion annealing due to the uphill diffusion of Al. This uphill diffusion was ascribed to Pt addition decreasing the chemical activity of aluminum in the γ + γ' alloys. For a given diffusion couple end member, the thickening kinetics of the γ' layer that formed increased with increasing Pt content in the Ni-Al-Pt γ + γ' alloy. The γ'-layer thickening kinetics in diffusion couples with Cr showed less of a dependence on Pt concentration. Inference of a negative effect of Pt and positive effect of Cr on the Al diffusion in this system enabled explanation of the observed interdiffusion behaviors. There was no or minimal formation of detrimental topologically close-packed (TCP) phases in the interdiffusion zone of the couples with CMSX-4 or CMSX-10. An overlay Pt-modified γ + γ' coating on CMSX-4 showed excellent oxidation resistance when exposed to air for 1000 hours at 1150°C. Moreover, the Al content in the coating was maintained at a relatively high level due to Al replenishment from the CMSX-4 substrate.

关键词： Nickel alloys

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In situ IR-RAS investigation of corrosion of tin in air containing H_2O, NO_2 and SO_2 at room temperature

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Journal of University of Science and Technology Beijing 2003年第3期10卷 35-38页

作者： SasakiTakeshi KanagawaRyoji OhtsukaToshiaki Research Group of Interface Control Engineering Graduate School of EngineeringHokkaido UniversitySapporo 060-8628JapanResearch Group of Interface Control EngineeringGraduate School of EngineeringHokkaido UniversitySapporo 060-8628JapanResearch Group of Interface Control EngineeringGraduate School of EngineeringHokkaido UniversitySapporo 060-8628Japan

In order to obtain a fundamental understanding of the corrosion behavior oftin in atmosphere, in situ IR-RAS (infrared reflection absorption spectroscopy) measurements wereperformed on tin in humid air containing SO_2 and NO_2 at room temperature. Time-resolved in situ IRspectra in air of 90 percent RH (relative humidity) containing 1 X 10^(-5)-2.2 X 10^(-5) SO_2suggested that the tin oxide layers worked as a protective film and no significant corrosionoccurred. The corrosion products in air of 80 percent-90 percent RH containing 1 X 10^(-5)-2.2 X10^(-5) NO_2 were SnO_2, SnO, nitrate and hyponitrite. The synergistic effect of SO_2 and NO_2 oncorrosion of tin was not observed in air of 90 percent RH containing 0.84 X 10^(-6) SO_2 and 1.8 X10^(-6) NO_2.

关键词： Corrosion of tin in a gaseous environment in situ IR-RAS

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Application of rhenium coating as a diffusion barrier to improve the high temperature oxidation resistance of nickel-based superalloy

Application of rhenium coating as a diffusion barrier to imp...

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Corrosion 2001

作者： Narita, Toshio Hayashi, Shigenari Shoji, Mayumi Hisamatsu, Yoshitake Yoshida, Daisuke Fukumoto, Michihisa Research Group of Interface Control Engineering Graduate School of Engineering Hokkaido University Kita-13 Nishi-8 Kita-Ku Sapporo060-8628 Japan Graduate School of Engineering Hokkaido University Kita-13 Nishi-8 Kita-Ku Sapporo060-8628 Japan

A nickel-based single crystal superalloy with or without a Re/AI coating was AkJiffusion treated and then oxidized in air at 1373K for up to 2.54Ms under thermal cycling and isothermal conditions. The Al-diffusion treatment, carried out at 1273K for 57.6ks in a mixture of FeAl and Al2O3 powder, resulted in a triplex layer structure in the sequence β -NiAl / Re-rich layer / Al-difllision zone on the alloy. The Re-rich layer contained 25Ni, 19AI, and 16Cr (at%). When oxidized at 1373K for 460ks in air under thermal cycling, a very protective α -Al2O3 scale formed, while the -NiAl layer changed to Ni-aluminide (presumably γ -Ni3Al ) containing 21at%AI and the Re-rich layer to a Re-based alloy containing 31 Cr, 21 Ni, 12Co, 6W, and 3AI (at%) plus Re, which corresponded to a -phase in the Ni-Cr-Re phase diagram. The protective α-Al2O3 scale and the resulting triplex coating structure of γ '-Ni3Al /σ-phase(Cr-Re-Ni system) / alloy substrate were maintained with little change for up to 2.54Ms under isothermal oxidation. The formation of the triplex structure was discussed by using the diffusion path on the ternary Ni-Cr-Re and binary Ni-AI phase diagrams. In the Akliffusion and subsequent initial stage of oxidation the Al, Ni, Co and Cr diffused rapidly through the Re/AI coating and the Re-Ni-AI-Cr alloy layer. With further oxidation at 1373K the Re-Cr-Ni (Co) (σ -phase ) alloy layer formed between the alloy substrate and γ '-Ni3Al layer and it was found to act as a very effective diffusion barrier to the alloying elements and Al. © 2001 by NACE International.

关键词： Nickel alloys

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Sulfidation-resistant nickel-base superalloy for FCC gas expander turbine

Sulfidation-resistant nickel-base superalloy for FCC gas exp...

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Corrosion 2000

作者： Yakuwa, Hiroshi Miyasaka, Matsuho Go, Tetsu Nakahama, Shuhei Kawasaki, Masamichi Fang, Cheng Narita, Toshio Technology Development Center Ebara Research Company 2-1 Honfujisawa-4 Fujisawa251-8502 Japan Materials and Joining Engineering Office Machinery and Equipment Group Ebara Corporation 20-1 Nakasode Sodegaura299-0296 Japan Project Coordination Office Machinery and Equipment Group Ebara Corporation Nissay Aroma Square 5-37-1 Kamata Ohta-ku144-8721 Japan Research Group Interface Control Engineering Graduate School of Engineering Hokkaido University Kita-13 Nishi-8 Kita-ku Sapporo060-8628 Japan

A nickel-base superalloy that has excellent sulfidation resistance, high-temperature tensile properties and hot workability was developed as a material for the rotors of FCC gas expander turbines. The effect of Mo, Ti and/or Al additions on the sulfidation behavior of a Ni-20Cr-13.5Co alloy was investigated in H2-H2S mixtures at 873 K (600 C/1112 F). It was found that increasing the Al content in the alloy could improve the sulfidation resistance of AISI 685 (UNS N07001). Six kinds of forged alloy, in which the Al content was increased while Ti content was decreased, were manufactured. Sulfidation tests and high-temperature tensile tests of those alloys indicated that the 1.5Ti-3.0Al alloy has about twice the sulfidation resistance and almost equivalent tensile properties to those of AISI 685. Therefore, the 1.5Ti-3.0Al alloy was selected as the most suitable alloy for FCC gas expander rotors. A 1400 mm diameter-expander rotor disk of this developed alloy was manufactured. Test specimens cut out of the disk rim showed that the disk had equivalent tensile properties both at room and elevated temperatures, and the same creep rupture strength as that of AISI 685. © 2000 by NACE International.

关键词： Superalloys

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