-1提高到6.73 s·(50 g)-1和6.83 g·cm-3提升至9.06 g·cm-3，鉭粉的球化率和球形度分別可約達(dá)95.2%和0.92；球化過(guò)程中衛(wèi)星粉的形成主要是因液滴的碰撞所致，且隨著送粉速度的增加，液滴碰撞概率增大，液滴的凝并使球形顆粒的粒徑增大。"/>

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鉭粉等離子體球化及其球化過(guò)程中衛(wèi)星粉的形成機(jī)制
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作者單位:

1.核工業(yè)西南物理研究院，四川 成都 610041;2.南華大學(xué)，湖南 衡陽(yáng) 421001;3.山西大學(xué)，山西 太原 030006

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基金項(xiàng)目:

國(guó)家自然科學(xué)基金（11875039, 52173041），西物創(chuàng)新項(xiàng)目(202102XWCXYD001)，四川省科學(xué)技術(shù)廳重點(diǎn)研發(fā)項(xiàng)目(2019YFG0444)


Plasma Spheroidization of Ta Powder and Formation Mechanism of Satellite Powder in the Process of Spheroidization
Author:
Affiliation:

1.Southwestern Institute of Physics, Chengdu 610041, China;2.University of South China, Hengyang 421001, China;3.Shanxi University, Taiyuan 030006, China

Fund Project:

National Natural Science Foundation of China (11875039, 52173041); Innovation Program of SWIP (202102XWCXYD001); Sichuan Science and Technology Program (2019YFG0444)

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    摘要:

    微米級(jí)鉭粉（Ta）在生物醫(yī)療增材制造和其它制造領(lǐng)域具有廣闊的應(yīng)用前景。采用射頻熱等離子體對(duì)不規(guī)則鉭粉進(jìn)行球化處理以改善其流動(dòng)性，對(duì)等離子體球化處理前后的鉭粉進(jìn)行了表征，并分析了球化過(guò)程中衛(wèi)星粉的形成過(guò)程與機(jī)制。結(jié)果表明，經(jīng)等離子體球化后的鉭粉具有較為理想的球形度和光滑的表面，其霍爾流動(dòng)性和表觀密度分別從13.6 s·(50 g)-1提高到6.73 s·(50 g)-1和6.83 g·cm-3提升至9.06 g·cm-3，鉭粉的球化率和球形度分別可約達(dá)95.2%和0.92；球化過(guò)程中衛(wèi)星粉的形成主要是因液滴的碰撞所致，且隨著送粉速度的增加，液滴碰撞概率增大，液滴的凝并使球形顆粒的粒徑增大。

    Abstract:

    Micron tantalum powder (Ta) has broad application prospects in biomedical additive manufacturing and other manufacturing fields. The irregular tantalum powder was spheroidized by RF thermal plasma to improve its fluidity. The tantalum powder before and after plasma spheroidization was characterized, and the formation mechanism of satellite powder in the process of spheroidization was analyzed. The results show that the tantalum powder after plasma spheroidization has ideal sphericity and smooth surface, and its Hall fluidity and apparent density are increased from 13.6 s·(50 g)-1 to 6.73 s·(50 g)-1 and from 6.83 g·cm-3 to 9.06 g·cm-3, respectively. The spheroidization rate and spherical degree of tantalum powder can reach about 95.2% and 0.92, respectively. The formation of satellite powder in the spheroidization process is mainly caused by the collision of droplets, and with the increase in powder feeding rate, the collision probability of droplets increases, resulting in larger particle size of spherical particles due to the droplet condensation.

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引用本文

陳倫江,陳文波,但敏,賀巖斌,聶軍偉,朱海龍,童洪輝,金凡亞.鉭粉等離子體球化及其球化過(guò)程中衛(wèi)星粉的形成機(jī)制[J].稀有金屬材料與工程,2023,52(2):409~415.[Chen Lunjiang, Chen Wenbo, Dan Min, He Yanbin, Nie Junwei, Zhu Hailong, Tong Honghui, Jin Fanya. Plasma Spheroidization of Ta Powder and Formation Mechanism of Satellite Powder in the Process of Spheroidization[J]. Rare Metal Materials and Engineering,2023,52(2):409~415.]
DOI：10.12442/j. issn.1002-185X.20220270

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  • 收稿日期:2022-04-01
  • 最后修改日期:2022-05-05
  • 錄用日期:2022-06-17
  • 在線發(fā)布日期: 2023-03-03
  • 出版日期: 2023-02-28