Research on process control of intermittent electrodeposition for preparation of core-shell powder

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2022-07-01 DOI:10.1016/j.powtec.2022.117632

Nan Deng , Jianqiang Li , Shuhua Liang , Hong Sun , Yongchang Guo

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引用次数: 1

Abstract

The uniformity of composite powder is crucial for preparing composite materials with excellent performance. Herein, an Intermittent electrodeposition technology has been proposed, which can deposit a coating on micron powder and achieve evenly mixing on the particle scale. In this study, Taking the W@Cu core-shell powder as an example, the effect of cathode density, deposition time and pulse width on composition and cladding rate of the core-shell powder and its properties were determined. Furthermore, the relationship between cladding layer thickness and load capacity, current intensity and electrodeposition time was proposed. The experimental results showed that the core-shell powder obtained at the optimal current density of 7 A/dm² had an average thickness of 2.8 μm cladding rate of 92.7% after electrodeposition for 40 min. It indicated the theoretical model can effectively predict the core-shell powder thickness. Finally, the formation processes of the cladding layer of the core-shell powder were also clarified.

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间歇电沉积制备核壳粉末工艺控制研究

复合粉末的均匀性对制备性能优良的复合材料至关重要。本文提出了一种间歇电沉积技术，该技术可以在微米级粉末上沉积涂层，并在颗粒尺度上实现均匀混合。本研究以W@Cu核壳粉末为例，研究了阴极密度、沉积时间和脉冲宽度对核壳粉末组成、包覆率及其性能的影响。此外，还提出了熔覆层厚度与负载能力、电流强度和电沉积时间的关系。实验结果表明，在最佳电流密度为7 A/dm2时，电沉积40 min后得到的芯壳粉末平均厚度为2.8 μm，包覆率为92.7%，表明该理论模型可以有效地预测芯壳粉末的厚度。最后阐明了核壳粉末包层的形成过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.