Fabrication of externally wetted emitter for ionic liquid electrospray thruster by low-speed wire cutting combined with electrochemical etching
文献类型：期刊论文
| 作者 | Xue, Senwen; Duan, Li; Kang, Qi2; Kang Q(康琦) ; Duan L(段俐)
|
| 刊名 | AIP ADVANCES
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 11期号:11页码:14 |
| DOI | 10.1063/5.0072630 |
| 通讯作者 | Kang, Qi(kq@imech.ac.cn) |
| 英文摘要 | The micro-newton thrust generated by an ionic liquid electrospray thruster (ILET) can be used for drag-free control, attitude precise control, networking, and formation flight of micro-nano-satellites or spacecraft. Fabrication of high-quality emitters is one of the key technologies for the application of ILETs. A new method for fabricating externally wetted emitters is presented in this article. This method uses low-speed wire cutting (LSWC) combined with electrochemical etching, and the externally wetted emitter is fabricated in three steps. First, the tungsten cuboid is shaped by LSWC to get the geometry of the emitter. Second, the emitter is cleaned by superacid to remove the oxide layer that critically prevents the ionic liquid from wetting the emitter. Finally, microchannels are etched on the emitter surface by electrochemical etching. The tungsten emitter fabricated by the above-mentioned steps can obtain excellent wettability, and its microchannel can reduce the contact angle between the wall and the ionic liquid and enhance the capillary force that promotes the ionic liquid to climb along the emitter. The ionic liquid is spread into a uniform liquid film on the emitter surface to ensure a stable and continuous flow supply so that the thruster can work in pure ionic emission mode for a long time with low noise, high resolution, and a high thrust power ratio. The quantitative and qualitative analysis of all elements before and after the pickling emitter proves the feasibility of removing the oxide layer. The morphology features of the emitter are measured and observed using a metallographic microscope and profilometer, including the microchannel structure and its size and tip size and the thickness of the liquid film. Through repeated observation and evaluation, the etching parameters are recorded, including the amplitude and frequency of AC voltage, the etching time, the depth of emitter immersion in the solution, and the concentration of NaOH solution. In order to compare the performance of an externally wetted emitter and a porous emitter, the same process is used to fabricate two kinds of emitters. The conclusions on beam current, the resolution and noise of beam current, ignition reliability, and emission time are summarized during the emission testing. The emission tests indicate that the externally wetted emitter exhibits outstanding performance, which depends on its better wettability and the fact that the microchannels are not easily blocked by the products of electrochemical reaction.& nbsp;(C) 2021 Author(s). |
| WOS关键词 | TIPS ; EVAPORATION ; NICKEL ; ARRAY |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Science[XDB23030300] ; National Natural Science Foundation of China[12032020] ; National Natural Science Foundation of China[12072354] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000719750400002 |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Science ; National Natural Science Foundation of China |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/87990]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 通讯作者 | Kang, Qi |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xue, Senwen,Duan, Li,Kang, Qi,et al. Fabrication of externally wetted emitter for ionic liquid electrospray thruster by low-speed wire cutting combined with electrochemical etching[J]. AIP ADVANCES,2021,11(11):14. |
| APA | Xue, Senwen,Duan, Li,Kang, Qi,康琦,&段俐.(2021).Fabrication of externally wetted emitter for ionic liquid electrospray thruster by low-speed wire cutting combined with electrochemical etching.AIP ADVANCES,11(11),14. |
| MLA | Xue, Senwen,et al."Fabrication of externally wetted emitter for ionic liquid electrospray thruster by low-speed wire cutting combined with electrochemical etching".AIP ADVANCES 11.11(2021):14. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。