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1,012 results on '"Sun, Jianbo"'

152. Correction to: Niche differentiation and higher uptake of available nitrogen maintained the productivity of alpine meadow at early degradation

Author

Lai, Chimin, primary, Peng, Fei, additional, Sun, Jianbo, additional, Zhou, Jun, additional, Li, Chengyang, additional, Xu, Xingliang, additional, Chen, Xiaojie, additional, You, Quangang, additional, Sun, Hongyang, additional, Sun, Jian, additional, Xue, Xian, additional, and Lambers, Hans, additional

Published
2022
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153. Bush‐Shaped Vertical Graphene/Nichrome Wire for Blackbody‐Like Radiative Heating

Author

Wang, Kun, primary, Cheng, Shuting, additional, Yang, Jiawei, additional, Cheng, Yi, additional, Ci, Qing, additional, Yuan, Hao, additional, Huang, Kewen, additional, Liu, Ruojuan, additional, Li, Wenjuan, additional, Li, Junliang, additional, Tu, Ce, additional, Liang, Fushun, additional, Yang, Yuyao, additional, Sun, Jianbo, additional, Hu, Qingmei, additional, Yin, Jianbo, additional, Guan, Baolu, additional, Ren, Xingang, additional, Qi, Yue, additional, and Liu, Zhongfan, additional

Published
2022
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160. Strengthening Mechanism of Nanosized Magnesium Silicate Hydroxide on the Tribological Properties of Phosphate-Bonded Solid Coatings.

Author

Xi, Zhengchao, Sun, Jianbo, Chen, Lei, Cui, Haixia, Ma, Yanjun, Zhou, Huidi, and Chen, Jianmin

Abstract

Natural serpentine and nanosized magnesium silicate hydroxide (MSH) were separately incorporated to improve the tribological properties of phosphate-bonded solid coatings. The differences in tribological properties between natural serpentine and MSH at different temperatures were elaborately explored. It was suggested that MSH can more apparently improve the antiwear performance of phosphate coatings than natural serpentine. The specific reasons were attributed to the big specific surface area and weak thermal stability of MSH. Under the combined effort of frictional force and friction temperature, the structural water in MSH can be easily dehydrated and can generate numerous dangling bonds on the outside surface. Simultaneously, structural distortion of MSH also inevitably occurred, which resulted in lots of oxygen functional groups of MSH being released at the frictional interface during the friction process. Besides, MSH has a strong cation replacement ability, and therefore, it can easily adsorb and undergo tribochemical reactions with the metal-based worn surface. In consequence, a composite protective tribo-film was in situ formed on the worn surface and direct abrasion on the worn surface was greatly alleviated during the friction process. The results offered an approach for designing and preparing antiwear phosphate composite solid coatings for the tribological applications of metal-based friction pairs at different friction temperatures. [ABSTRACT FROM AUTHOR]

Published
2023
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163. A Fuzzy CMAC Controller with Eligibility

Author

Shen, Zhipeng, Guo, Chen, Sun, Jianbo, Shi, Chenjun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Liao, Xiao-Feng, editor, and Yi, Zhang, editor

Published
2005
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164. Influence of Retrogression and Reaging Treatment on Microstructure and Microhardness of the 3A21/7075 Aluminum Alloy Cladding Material

Author

Xiaoxue Ren, Sun Jianbo, Ming Hu, and Yunlong Zhang

Subjects
010302 applied physics, Structural material, Materials science, Article Subject, Renewable Energy, Sustainability and the Environment, Metallurgy, Alloy, TJ807-830, 02 engineering and technology, General Chemistry, engineering.material, 021001 nanoscience & nanotechnology, Cladding (fiber optics), Microstructure, 01 natural sciences, Indentation hardness, Renewable energy sources, Atomic and Molecular Physics, and Optics, Casting (metalworking), 0103 physical sciences, Vickers hardness test, engineering, General Materials Science, 0210 nano-technology, Electron backscatter diffraction
Abstract

The 7075 aluminum alloy was an important structural material in the field of aeronautics and astronautics. With the development of this field, the requirements for its comprehensive properties were increasing. A novel casting method, the impact jet solid-liquid compound casting, was adopted to fabricate the 3A21/7075 aluminum alloy cladding material. Retrogression and reaging (RRA) treatment was further applied to the 3A21/7075 aluminum alloy cladding material in order to investigate the influence of RRA on microstructure and microhardness of the 3A21/7075 aluminum alloy cladding material. Then, the electron backscattered diffraction (EBSD) technique and the transmission electron microscope (TEM) together with the energy dispersive spectrometer (EDS) and the hardness test were utilized to analyze the influence of RRA treatment on microstructure and hardness of the 3A21/7075 aluminum alloy cladding material. The research results showed the 3A21/7075 aluminum alloy cladding material had better deformability. The amount of fine and dispersed phases precipitated in grains was in favor of improving the comprehensive mechanical properties of the 3A21/7075 aluminum alloy cladding material. This research might provide data and a theoretical approach for the engineering application of the 3A21/7075 aluminum alloy cladding material.

Published
2021

172. Formation of a two-dimensional oxide via oxidation of a layered material

Author

Camilli, Luca, Capista, Daniele, Tomellini, Massimo, Sun, Jianbo, Zeller, Patrick, Amati, Matteo, Gregoratti, Luca, Lozzi, Luca, Passacantando, Maurizio, Camilli, Luca, Capista, Daniele, Tomellini, Massimo, Sun, Jianbo, Zeller, Patrick, Amati, Matteo, Gregoratti, Luca, Lozzi, Luca, and Passacantando, Maurizio

Abstract

We investigate the oxidation mechanism of the layered model system GeAs. In situ X-ray photoelectron spectroscopy experiments performed by irradiating an individual flake with synchrotron radiation in the presence of oxygen show that while As leaves the GeAs surface upon oxidation, a Ge-rich ultrathin oxide film is being formed in the topmost layer of the flake. We develop a theoretical model that supports the layer-by-layer oxidation of GeAs, with a logarithmic kinetics. Finally, assuming that the activation energy for the oxidation process changes linearly with coverage, we estimate that the activation energy for As oxidation is almost twice that for Ge at room temperature.

Published
2022

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