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17 results on '"Tan, Wenyue"'

12. Old dye safranine as an organic photocatalyst for the synthesis of substituted quinazolinones.

Author

Liu, Cheng-Hang, Wang, Jun-Jie, Xu, Mengyang, Luo, Qiyun, Wang, Ziyan, Tan, Wenyue, Zhao, Xingzeng, and Jia, Xiaodong

Subjects
QUINAZOLINONES, ORGANIC synthesis, ORGANIC dyes, VISIBLE spectra, RING formation (Chemistry), DYES & dyeing
Abstract

Safranine-catalyzed oxidative cyclization reaction of substituted 2-aminobenzamides and aldehydes utilizing oxygen as a green oxidant under visible light conditions at room temperature has been developed. Good to excellent yields of the desired quinazolinone products were achieved. Furthermore, the presented procedure illustrates the applicability of gram scale reactions. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Fabrication and mechanical properties of nano‑carbon reinforced laminated Cu matrix composites

Author

Zhenyi Shao, Yongjian Fang, Hongliang Sun, Tan Wenyue, Rui Shu, and Xiaosong Jiang

Subjects
Toughness, Compressive strength, Materials science, law, General Chemical Engineering, Powder metallurgy, Ultimate tensile strength, Spark plasma sintering, Carbon nanotube, Composite material, Grain size, Nanocrystalline material, law.invention
Abstract

Inspired by the hierarchical structure of the pearl shell and its related multi-scale toughening mechanism, based on the combination of powder metallurgy technology and spark plasma sintering, a layered graphene and carbon nanotubes hybrid reinforced Cu matrix composite material was successfully prepared. Compared with other conventional Cu matrix composite materials, the compressive elongation of the bionic materials is significantly improved, and all of them are above 20%, which is attributed to the effective crack deflection and the pull-out of the reinforcing phase. In terms of overall strength and toughness, (0.8 wt% MWCNTs+0.2 wt% GNPs)/Cu has the best performance. Its tensile strength, compressive strength and compressive elongation are 103.63 MPa, 202.32 MPa and 33.49% respectively. The large grain size in the laminates is conducive to the movement of dislocations, while the interlayer interface and nanocrystalline grains hinder the movement of dislocations in the direction perpendicular to the laminates.

Published
2022

15. Microstructures and mechanical properties of α-Al2O3W and MWCNTs hybrid reinforced laminated Cu matrix composites.

Author

Luo, Fang, Jiang, Xiaosong, Tan, Wenyue, Sun, Hongliang, Zhang, Yali, Fang, Yongjian, Shu, Rui, and Cheng, Huichao

Subjects
COPPER, MICROSTRUCTURE, INTERFACIAL bonding, GRAIN size, COMPRESSIVE strength
Abstract

The balance between strength and toughness is of great importance. In this paper, the microstructure and properties of laminated composites in X-Y direction were characterized and analyzed. The effect of the content of α-Al2O3w and MWCNTs on the laminated structure and properties was analyzed, and strengthening mechanisms and toughening mechanisms of the material were discussed. The laminated structure of traditional Cu matrix composites was designed by a combination of flake powder metallurgy and SPS sintering. Compared with spherical Cu, flake Cu can increase the interface contact between matrix and reinforcement phase, which is conducive to the formation of self-assembly of laminated structure in SPS sintering process. The strength and compressive elongation of 1.0 wt.% MWCNTs-1.0 wt.% α-Al2O3w/Cu hybrid laminated composites were the best, reaching 453.43 MPa, 50%, respectively. This is mainly due to the composites containing MWCNTs less than 1.0 wt.% had uniform microstructure and good interfacial bonding, and the loads were effectively transferred from Cu matrix to MWCNTs and α-Al2O3w. At the same time, the large grain size in the plane is favorable for dislocation movement, while the interlayer interface and nanocrystals hinder the combination of dislocation movement perpendicular to the plane to achieve a balance of strength and toughness. [ABSTRACT FROM AUTHOR]

Published
2023
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16. Fabrication and mechanical properties of α-Al2O3 whisker reinforced cu-graphite matrix composites

Author

Zhenyi Shao, Xiaosong Jiang, Zhiping Luo, Hongliang Sun, Tan Wenyue, Tingfeng Song, Chinese Academy of Sciences, and China Postdoctoral Science Foundation

Subjects
Materials science, General Chemical Engineering, Spark plasma sintering, Composite number, Mechanical properties, Alumina whisker, 02 engineering and technology, 021001 nanoscience & nanotechnology, Microstructure, Diffusion layer, Compressive strength, 020401 chemical engineering, Whisker, Relative density, 0204 chemical engineering, Composite material, 0210 nano-technology, Copper-graphite, Strengthening mechanisms of materials
Abstract

In this work, α-Al2O3 whisker reinforced Cu-graphite matrix composites were prepared by spark plasma sintering. Results show that the surface modification of α-Al2O3 whiskers with sodium dodecyl sulfate solution can improve its dispersibility, and the composites obtained are basically completely dense. The relative density of all composite materials is above 95%. The interface bonding mode in the composite is mainly mechanical bonding, and the formation of a diffusion layer is also observed from interfaces. With the increase of α-Al2O3 whisker content, mechanical properties of the composites increase first and then decrease. The composite with 1.0 wt% α-Al2O3 whisker has the best performance. The corresponding relative density, hardness and compressive strength are 96.35%, 56.20 HV, 139.12 MPa, respectively. By analyzing microstructure and fracture morphology of the composites, it is determined that the strengthening mechanisms are mainly fine grain strengthening, particle strengthening and load transfer. Simultaneously, the fracture type is brittle fracture., This work was supported by Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences (No.IIMDKFJJ-19-08) and China Postdoctoral Science Foundation (No. 2015M570794, No. 2018T110993).

Published
2020

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