A low aspect ratio electrothermal gun for metal plasma vapor discharge and ceramic nanopowder production
- Authors
- Kim, Kyoungjin; Peterson, Dennis R.
- Issue Date
- Jul-2008
- Publisher
- KOREAN SOC MECHANICAL ENGINEERS
- Keywords
- electrothermal gun; metal plasma vapors; plasma vapor discharge; nanomaterial synthesis
- Citation
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.22, no.7, pp 1408 - 1416
- Pages
- 9
- Journal Title
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
- Volume
- 22
- Number
- 7
- Start Page
- 1408
- End Page
- 1416
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/23860
- DOI
- 10.1007/s12206-008-0414-9
- ISSN
- 1738-494X
1976-3824
- Abstract
- Traditionally, the electrothermal gun design has the bore of a large aspect ratio; however, a low aspect ratio design with a shorter bore length has been employed for efficient production of metal plasma vapors and synthesis of nanomaterials. In a comparison of the arc resistance-current relationship, a low aspect ratio design is found to exhibit distinctively different characteristics compared to a high aspect ratio design, and this trend is explained by the scaling law of plasma pr operties including theory of plasma electrical conductivity. A one-dimensional isothermal model has been applied to the present experiments to confirm the scaling laws, and it was found that the present modification of the electrothermal gun is able to produce fully ionized metal plasma vapor, while the plasma vapor produced in a conventional design is partially ionized. Also, by reacting metal plasma vapors with the controlled gases in the reaction chamber, nanoscale materials such as aluminum oxide, aluminum nitride, and titanium oxide were synthesized successfully.
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Collections - School of Mechanical System Engineering > 1. Journal Articles
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