Modeling and analysis of the plasma primary atomization for controllable preparation of high-quality spherical metal powders
Modeling and analysis of the plasma primary atomization for controllable preparation of high-quality spherical metal powders
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可控制备高质量球形金属粉末的等离子体一次雾化建模与分析
DOI：
10.1016/j.jmatprotec.2022.117753
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发表时间：
2022-08
影响因子：
6.3
通讯作者：
Yu Xiao
中科院分区：
文献类型：
--
作者：
Qingbo Zhang;Deping Yu;Peng Zhang;Yuxin Shen;Jiaxin Liu;Yu Xiao
等离子体初级雾化（PPA）是等离子体雾化（PA）中独特且关键的工艺，是一种备受认可的生产高质量球形粉末的材料加工技术，但对于如何将金属丝转化为高质量球形金属粉末缺乏深入的理解和模型。因此，对PPA过程进行实验观察和理论分析，以揭示熔融金属的行为，从而实现金属粉末的可控制备。首先，通过实验观察揭示了PPA的典型阶段。其次，建立了 PPA 上的传热传质模型，以揭示熔融金属如何在线材表面产生和传输。第三，根据实验观察和提出的模型，对 PPA 中熔融金属的行为进行唯象建模和定量分析。由于这种行为决定了所产生粉末的平均尺寸和产量，因此确定了两个关键影响参数，以分别定量反映熔融金属的熔化和转移行为。然后，根据所提出的PPA模型建立了它们的计算方程并进行了验证。利用所提出的PPA模型和建立的关键影响参数的计算方程，可以通过等离子炬的优化设计和PA工艺参数的选择来定量控制所生产粉末的质量。 • 研究了PPA 中的流固耦合相互作用。 • 明确了PPA熔融金属的转移条件。 • 建立了PPA的现象学模型。 • 确定了PPA 的熔融金属行为和关键影响参数。 • 确定了关键影响参数的计算方程。
Plasma primary atomization (PPA) is a unique and critical process in the plasma atomization (PA), which is a highly recognized materials processing technology for producing high-quality spherical powder, but there lacks of in-depth understanding and models on how the metal wire is converted into high-quality spherical metal powders. Therefore, experimental observations and theoretical analysis on the PPA process were carried out to reveal the behavior of molten metal for controllable preparation of the metal powders. Firstly, the typical stages in the PPA were firstly revealed by experimental observations. Secondly, heat and mass transfer models on PPA were established to reveal how the molten metal is generated and transferred on the wire surface. Thirdly, the behavior of the molten metal in PPA was phenomenologically modeled and quantitatively analyzed based on the experimental observations and the proposed models. As such behavior determines the average size and yield of the produced powders, two key influencing parameters were identified to quantitatively reflect the melting and transfer behavior of the molten metal respectively. Then, calculation equations for them were established based on the proposed models of PPA and then verified. With the proposed models of PPA and the established calculation equations of the key influencing parameters, the quality of the produced powders may be quantitatively controlled by optimal design of the plasma torch and selection of the processing parameters of PA. • The fluid-solid coupling interaction in PPA was investigated. • The transfer condition of molten metal of PPA was clarified. • The phenomenological models of PPA were established. • The molten metal behavior and key influencing parameters of PPA was identified. • The calculation equations for the key influencing parameters were determined.
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DOI：
10.4028/www.scientific.net/msf.1040.1
发表时间：
2021-07
期刊：
Materials Science Forum
影响因子：
--
作者：
S. Ermakov;S. Vologzhanina;B. Ermakov
通讯作者：
S. Ermakov;S. Vologzhanina;B. Ermakov
影响因子：
3.6
作者：
Zhengxin Yin;Deping Yu;Qingbo Zhang;Shengyuan Yang;Tong Yang
通讯作者：
Zhengxin Yin;Deping Yu;Qingbo Zhang;Shengyuan Yang;Tong Yang
影响因子：
6.3
作者：
Shanwen Dong;Bin Xu;Zhenyang Lu;Shujun Chen;F. Jiang
通讯作者：
Shanwen Dong;Bin Xu;Zhenyang Lu;Shujun Chen;F. Jiang
影响因子：
1.4
作者：
Fredrik Persson;Anders Eliasson;Pär Jönsson
通讯作者：
Fredrik Persson;Anders Eliasson;Pär Jönsson
影响因子：
6.4
作者：
Jinqi Zhu;Ruifeng Dou;Ye-rong Hu;S. Zhang;Xu-ying Wang
通讯作者：
Jinqi Zhu;Ruifeng Dou;Ye-rong Hu;S. Zhang;Xu-ying Wang