Rundong Zhou

State Key Laboratory of Transient Optics and Photonics

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Co-Authors

Denggao Guan

Chengdu University of Technology

Dehao Hu

Chengdu University of Technology

Liang Hua

Yancheng Institute of Technology

Yi Cao

Soochow University

Li Cheng

Chongqing University

Zehang Dai

Chengdu University of Technology

Song Fang

Nanjing Institute of Railway Technology

Chuan Jin

Hainan University

Yao Sun

National Institute of Clean and Low-Carbon Energy

Xinghong Pu

Sichuan University

Cooperative Institutions

Chengdu University of Technology

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Xi'an Institute of Optics and Precision Mechanics

State Key Laboratory of Transient Optics and Photonics

University of Science and Technology Beijing

Sichuan University

Chinese Academy of Agricultural Sciences

Hunan University

Shanghai Jiao Tong University

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Influence of Ni-Cu-La-B-coated Glass Fiber on Conductivity and Electromagnetic Shielding Performance of Coatings

Journal of Physics Conference Series (2019)

Denggao Guan Liu Yang Dehao Hu Rundong Zhou Xueqi Guo

A novel electromagnetic environmental pollution protective coating with high performance was prepared with Ni-Cu-La-B-coated glass fiber and nickel powder as composite fillers. Its conductivity,shielding effectiveness was discussed. The results showed that the coatings with a thickness of 300 μm containing 6 wt% of Ni-Cu-La-B-coated glass fibers had the lowest resistivity of 0.58 Ω·cm and best shielding effectiveness ranging from 51.45 dB to 62.18 dB in 0.3-1 000 MHz frequency band.

Shielding effect

10.1088/1742-6596/1187/2/022049

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Residual life evaluation of remanufacturing blanks considering the crack closure

Advances in Mechanical Engineering (2022)

Liang Hua Song Fang Rundong Zhou Linghong Shen

The nonlinear continuous fatigue cumulative damage model proposed by Chaboche was modified considering the effect of crack closure on fatigue damage, and the fatigue cumulative damage and residual life evaluation model of remanufactured blanks was obtained. The related parameters of the modified model were obtained from the data of symmetric cyclic tensile and compression fatigue tests. The residual life evaluation model of remanufactured blanks was verified by the two-stage loading (high and low loading and low and high loading) tensile and compressive fatigue test. The results show that the calculated values of the model are in good agreement with the test values, which proves that the modified model can accurately predict the residual life of remanufactured blanks.

Remanufacturing

Residual strength

Closure (psychology)

10.1177/16878132221139930

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Heteroatom-doped Porous Carbon Nanosheets Derived from Green Deep Eutectic Solvents for High-performance Micro-supercapacitors

Chemistry Letters (2020)

Rundong Zhou Cigang Xu Jiangrong Yang Denggao Guan Jinguang Cai

This study reports a facile and green preparation of heteroatom-doped porous carbon nanosheets derived from deep eutectic solvents (DES). N-doped or N, S-co-doped carbon porous nanosheets are produced by varying the composition of glucose-based DES followed by a simple KOH activation, which show highly improved capacitances. Besides, micro-supercapacitors based on N-doped carbon nanosheets exhibit a specific capacitance of 23.2 mF cm−2 at 0.2 mA cm−2, which is among the best compared to the results reported in the literature. This study reports a facile and green preparation of heteroatom-doped porous carbon nanosheets derived from a deep eutectic solvent (DES). Typical N-doped porous nanosheets produced from glucose-based DES with high specific surface area and N-doping amount show a high capacitance of 298 F g−1. Besides, corresponding micro-supercapacitors exhibit a high specific capacitance of 23.2 mF cm−2.

Heteroatom

Carbon fibers

Deep eutectic solvent

10.1246/cl.200052

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Citations (11)

Damage and Fatigue Life Evaluation for Laser Cladding Remanufactured Wheel

Advances in Materials Science and Engineering (2022)

Liang Hua Rundong Zhou

Owing to high speeds and heavy loads, the wheels of trains and locomotives undergo gradual but significant damage. Conventionally, these damaged wheels are repaired using the rotatory repair method; however, this approach results in large amounts of material waste. To address this issue, in this study, laser cladding remanufacturing technology was employed to repair a damaged wheel. The contact stress and creep characteristics of the cladded wheel were determined using Simpack, a dynamic simulation software program. The existing damage function model, which is based on the wear number, was modified, and this modified model was used to perform damage assessments for the remanufactured wheel. Furthermore, a life evaluation model for wheels remanufactured using this laser cladding technology was established. The service life of the cladded wheel calculated using this model was in good agreement with the design life of the wheel.

Remanufacturing

Service life

Cladding (metalworking)

10.1155/2022/2060564

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Citations (8)

Conductivity and Electromagnetic Shielding Effectiveness of Flaky Ni/Ni–Cu–La–B-Coated Glass Fiber/Acrylic Resin Composite Shielding Coating

Springer proceedings in energy (2018)

Denggao Guan Liu Yang Dehao Hu Zehang Dai Caiwen Wu

Acrylic resin

Filler (materials)

10.1007/978-981-13-0158-2_32

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Evolvement Investigation of Secondary Electron Emission for Ultrathin MgO Coatings Prepared by Atomic Layer Deposition

Applied Sciences (2021)

Xiangping Zhu Junjiang Guo Xiangxin Li Rundong Zhou Dan Wang

MgO is a kind of high secondary electron yield (SEY) material with important applications in electron multipliers. MgO coatings can be used as the electron emission layer for multiplier dynode to improve the electron gain significantly. However, the SEY investigation on ultrathin MgO coatings is not complete and needed to be supplemented urgently. In this work, a series of MgO coatings with increasing thickness were prepared by atomic layer deposition. SEY properties and energy spectra were characterized, and the effect of coating thickness on SEY was systematically analyzed. Experimental results show that SEY of MgO/Si samples rises as the coating thickness increases. Merely, SEY almost does not change with the coating thickness when the thickness exceeds 30 nm. Then, a SEY semi-empirical theory was employed to interpret the SEY regularities of MgO coatings by regarding the coating samples as ideal double-layer structures. Theoretical calculation quantitatively explained the SEY variation observed during the experiments, and further quantified the SEY contribution level of top coating and bottom substrate for the 1 nm and 20 nm MgO coatings. The work is of great significance for comprehending the SEY of ultrathin MgO coatings and expanding the applications of nanoscale coatings with high SEY.

Secondary electrons

Secondary emission

Dynode

10.3390/app11114801

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Citations (10)

Effects of Black Silicon Surface Morphology Induced by a Femtosecond Laser on Absorptance and Photoelectric Response Efficiency

Photonics (2024)

Xiaomo Zhang Weinan Li Chuan Jin Yi Cao Feng Liu

In this study, the effects of variations in the height (h) and bottom radius (r) of black silicon microstructures on their absorptance and photoelectric response efficiency were analyzed. By using the relation cot⁡θ2=hr to combine the parameters, it was found that changes in morphology affected the absorptance of black silicon microstructures, with h being directly proportional to the absorptance, while r was inversely proportional. A positive correlation was observed between cot⁡θ2 and absorptance. However, the correlation between cot⁡θ2 and photoelectric response efficiency was not significant. Through Raman spectroscopy analysis of the samples, it was concluded that as the laser ablation energy density increased, more lattice defects were introduced, weakening the charge carrier transport efficiency. This study further elucidated the mechanism by which microstructural changes impacted the absorptance and energy density of black silicon, providing valuable insights for optimizing its energy density.

Absorptance

Black silicon

Photoelectric effect

Morphology

10.3390/photonics11100947

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