SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
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IF 4.784
Jun-wei Wang,Cui-zhen Zhang,Zhuo-hua Li,Hong-xia Zhou,Jia-xin He,Jing-chao Yu
As a solar energy storage medium at moderate-to-high temperature, molten chlorate severally corrodes metal vessels. The corrosion behavior and mechanisms of pure nickel (Ni), GH4033 and GH4169 in 793 K molten eutectic NaCl-MgCl 2 were studied. During the initial stage of corrosion, pure Ni and GH4033 gain weight from the many plate-like shells formed on the sample surface. After corrosion for 40 h, all sample surfaces were rather porous and loosened. MgO nuclei that were attached to the loosened microstructure surface fell off with the microstructures, which led to a continual decrease in the sample weight. The three sample surfaces were mainly composed of MgO and Ni or (Ni, Fe) from the sample substrate. Al and Ti were preferentially oxidized and stably excited on the GH4033 surface, which inhibits the corrosion process. The corrosion rate of GH4169 was the highest for the δ phase, which is rich in Nb, and phase boundaries were corroded preferentially. In the anode reaction, metal atoms escape from the corrosion system in the form of chlorides or aqueous chlorides.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
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2020
·
IF 3.204
Wanqi Zhao,Panpan Lin,Tiesong Lin,Peng He,Weimin Long,Ruyu Tian
Owing to the isothermal solidification of eutectic Au-Si filler, GH3039 joints were successfully manufactured at 430 °C. After Ti modified, GH3039 joints that could endure 800 °C were creatively achieved through the transformation of reaction layers. Dispersed Ni 49 Ti 14 Si 37 whiskers and CrSi 2 fine particle layer formed at the interface instead of continuous Ni 3 Si layer. This improved the joint shear strength to 131 MPa at room temperature and 15 MPa at 800 °C. Joining at low temperature but applying at high temperature offers a new option for the dissimilar bonding of Ni-based superalloy and ceramics that is in need of the residual stress alleviation.
研究领域:
材料科学
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焊接工程
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Xiaoli Feng,Haifeng Wang,Xuechao Liu,Canming Wang,Hongzhi Cui,Qiang Song,Kun Huang,Neng Li,Xue Jiang
Inconel 625 + x Al ( x = 0, 2.5, 5.0, 7.5, 10.0) alloy coatings were prepared by laser cladding. The addition of Al promoted the formation of the BCC phase, which changed the coating microstructure from an FCC + δ phase + Laves phase to FCC + BCC + δ phase + Laves phase. Inconel 625 + 2.5 Al alloy showed the greatest corrosion resistance among all samples. The formation of an Al 2 O 3 film improved the corrosion resistance of the coating, but excess Al decreased the Cr 2 O 3 content in the film, which decreased the corrosion resistance of the coating. Increasing the Al content aggravated the lattice distortion and improved the solid solution strengthening effect, while also increasing the amount of BCC phase, which improved the coating hardness. After adding Al, the Inconel 625 + x Al alloy coatings displayed strong plastic deformation resistance, and their wear resistance was improved due to the presence of a hard phase.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 47
·期 5
·5918-5928
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IF 3.83
Yu Zhao,Tianqi Zhang,Liaoyuan Chen,Tianbiao Yu,Jiayu Sun,Chuang Guan
In situ Ti(C, N), ring phase, and multi-phase enhanced Ni204-based alloy coating were prepared by adding various Ti/C/TiN ratios particles. The effects of the reinforcement phase on the microstructure, microhardness , tribological property, and microstructure characteristics at the interface between the coating and substrate were investigated. The results show that the coatings with a 5:1 mass fraction ratio of TiN/C exhibits the highest microhardness , which is 3.78 times higher than that of the original Ni204 coating. While, the coating with 21:7:2 mass fraction ratio of TiN/Ti/C exhibits the lowest friction coefficient , which is 4.44 times smaller than that of the original Ni204 coating. The addition of Ti and C particles promotes the precipitation of ring phase and carbides , reduces ceramic agglomeration, alleviates the floating of ceramic particles, and improves the bonding strength of reinforcement phases. Owing to the good mutual solubility among Fe, Ni, and, Cr elements, the diffusion happened at the interface between the coating and substrate.
研究领域:
材料科学
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表面工程
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金属学与金属工艺
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机械工程
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复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
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2022
·
IF 4.514
Jianqiao Yang,Shuzhong Wang,Jiahuan Wang,Jinlong Wang,Baoquan Zhang,Lu Liu,Wei Liu,Yanhui Li,Donghai Xu
In this study, the erosion-corrosion experiment of Ni based alloys in high-temperature and high-pressure supercritical water environment was performed. SiO 2 and Al 2 O 3 particles with the average diameter of 30 µm and 50 µm were used as erodent. The special designed specimens were fixed on a blade impeller , and the erosion tests were performed in a high pressure autoclave with a magnetic stirrer system. Results show that the basic corrosion mechanism is not changed by the erosion process. A Cr-rich inner oxide layer and a Fe/Ni rich outer oxide layer were formed on the alloy surface. However, the oxidation rates of the alloys were affected by the erosion process. Parts of the outer Fe and Ni oxides were removed by the erodent particles during the tests. The inner Cr oxide layer still exists owing to the self-healing ability of the Cr 2 O 3 layer, acting as a barrier to resist further corrosion of the alloys. The factors that affect the degree of erosion and the erosion-corrosion mechanism in SCW environment is analyzed.
研究领域:
材料科学
·
腐蚀科学
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高温高压环境材料行为
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表面工程
·
能源材料
✓ 已验证
DOI
高影响因子
Journal of Advanced Ceramics
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2022
·Vol. 11
·期 10
·1571-1582
·
IF 11.534
Wang Kailun,Zhu Jinpeng,Wang Hailong,Yang Kaijun,Zhu Yameng,Qing Yubin,Ma Zhuang,Gao Lihong,Liu Yanbo,Wei Sihao,Shu Yongchun,Zhou Yanchun,He Jilin
High-entropy rare-earth aluminate (Y 0.2 Yb 0.2 Lu 0.2 Eu 0.2 Er 0.2 ) 3 Al 5 O 12 (HE-RE 3 Al 5 O 12 ) has been considered as a promising thermal protection coating (TPC) material based on its low thermal conductivity and close thermal expansion coefficient to that of Al 2 O 3 . However, such a coating has not been experimentally prepared, and its thermal protection performance has not been evaluated. To prove the feasibility of utilizing HE-RE 3 Al 5 O 12 as a TPC, HE-RE 3 Al 5 O 12 coating was deposited on a nickelbased superalloy for the first time using the atmospheric plasma spraying technique. The stability, surface, and cross-sectional morphologies, as well as the fracture surface of the HE-RE 3 Al 5 O 12 coating were investigated, and the thermal shock resistance was evaluated using the oxyacetylene flame test. The results show that the HE-RE 3 Al 5 O 12 coating can remain intact after 50 cycles at 1200 °C for 200 s, while the edge peeling phenomenon occurs after 10 cycles at 1400 °C for 200 s. This study clearly demonstrates that HE-RE 3 Al 5 O 12 coating is effective for protecting the nickel-based superalloy, and the atmospheric plasma spraying is a suitable method for preparing this kind of coatings.
研究领域:
材料科学
·
涂层技术
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DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
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2022
·
IF 4.514
Jianqiao Yang,Jiyuan Sun,Shuyuan Bai,Hao Wu,Shuzhong Wang,Yanhui Li,Wenhao Ma,Donghai Xu
To improve the corrosion resistance of component materials in supercritical water oxidation (SCWO) environment, a 15 µm Cr coating was prepared on Alloy 625 by magnetron sputtering, and the effect of oxygen concentration (0 M, 0.16 M, and 0.94 M) on the stability of the Cr coating in an SCW environment was investigated. Results show that the stability of the Cr 2 O 3 layer strongly depends on the oxygen concentration in the exposure environment. The protective Cr 2 O 3 layer was transformed to soluble Cr(VI) species and dissolved in SCW containing 0.94 M oxygen. Except for Cr 2 O 3 , some Fe/Ni containing oxides were also detected. The stability of the Cr coating in SCW with different concentrations of oxygen is discussed.
研究领域:
材料科学
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腐蚀与防护
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表面工程
·
能源环境工程
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高温化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2024
·
IF 3.4
Jianqiao Yang,Yining Ding,Fen Zhao,Shuzhong Wang,Yanhui Li,Donghai Xu
In this study, a Cr coating was fabricated on Ni-based alloys to prevent under-deposit corrosion. The effect of salt deposition on the structural integrity of the Cr coating in SCW environment with/without oxygen was investigated. Results show that the Cr coating kept its integrity after exposure in SCW environment, successfully avoided the metallic ions leaching from Ni-based alloys. The structure of the oxide layer after exposure is a thin Fe 2 O 3 or FeCr 2 O 4 layer and a Cr 2 O 3 layer. The oxidation rate of the Cr coating decreased to one third of the sample after exposure in the same environment without salt deposit layer, indicating that the inward mass-transfer of oxygen to the alloy surface was inhibited by the salt deposit layer. The volume expansion of the sample due to the growth of Cr oxide layer was restrained by the salt deposit layer, forming a growth stress in the coating.
研究领域:
材料科学
·
腐蚀科学
·
高温材料学
·
表面工程
·
能源材料
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xinkai Ding,Changtai Liu,Wenyang Huang,Yifan Zhou,Enzhu Hu,Kun Yu,Yong Xu,Kunhong Hu
Nickel-based alloy composites are high-temperature wear-resistant materials used in extreme environments such as nuclear reactors and aerospace engines. While offering excellent mechanical properties, their tribological performance under high temperatures requires significant enhancement. In this work, we present a sustainable approach utilizing biomass-derived onion-like carbon (OLC) to address this challenge. OLC was successfully synthesized through catalytic pyrolysis of rice husk ash (RHA) and incorporated into a nickel–chromium-molybdenum-titanium-aluminum alloy matrix via powder metallurgy, with different mass fractions (0-7 wt%). The composites were systematically evaluated using high-temperature micro-tribological tester, with post-test characterization performed by SEM/EDS and LSM. Results demonstrate that 3 wt% OLC represents an optimal concentration, enhancing hardness by 114 % and significantly improving interfacial bonding strength. During high-temperature friction, OLC particles facilitate pore-filling and interface optimization, subsequently forming both continuous carbon films and composite oxide layers (NiO, Cr 2 O 3 , Ni 3 C) that effectively isolate friction pairs. First-principles calculations reveal that OLC’s spherical nanostructure induces lower interfacial adhesion and reduced sliding energy barriers compared to conventional graphene. The combined experimental and theoretical approach establishes a comprehensive understanding of the multi-mode lubrication mechanism, highlighting OLC’s dual role in surface protection and wear-debris suppression. Our work provides valuable guidance for developing high-performance, sustainable nickel-based composites for demanding high-temperature applications.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Mengjuan Wu,Yizhou Shen,Jie Wang,Xi Wang
Hydrophobic metallic coatings have garnered significant scientific and industrial interest due to their exceptional mechanical durability and extensive application potential. A critical yet not fully understood phenomenon associated with certain metallic surfaces is the spontaneous and reversible transition from an initial hydrophilic state to a hydrophobic state over time. This study aims to elucidate the physicochemical mechanisms underlying the time-dependent wettability transition. The Ni based alloy coating, characterized by an intricate, rough hierarchical structure, was successfully fabricated on 304 stainless steel (SS) substrates through electrodeposition. The temporal evolution of the coating's wetting behavior was systematically monitored, confirming a transition from hydrophilicity to hydrophobicity following aging in ambient air. To disentangle the underlying factors contributing to this phenomenon, plasma cleaning was employed to systematically remove adsorbed airborne hydrocarbons from the coating surface. Comparative X-ray photoelectron spectroscopy (XPS) analysis of the surfaces before and after plasma treatment revealed a substantial reduction in the atomic ratio of airborne hydrocarbon groups (from 79.2 % to 62.7 %), accompanied by a notable increase in lattice oxygen content. These findings demonstrate that the observed wettability transition is a multifaceted process arising from synergistic effects involving both physical adsorption of environmental hydrocarbons and concurrent chemical changes occurring on the coating surface. The interaction between adsorbed hydrocarbon molecules and lattice oxygen has been identified as a key driver for the gradual evolution of surface wettability. Collectively, these insights enhance the understanding of dynamic interfacial behaviors exhibited by metallic coatings and establish a fundamental theoretical framework for rational design and optimization of stable hydrophobic metallic surfaces.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）