Numerical Analysis of Current Attachment at Thermionic Cathode for Gas Tungsten Arc at Atmospheric Pressure

Yamamoto, Kentaro; Tashiro, Shinichi; Tanaka, Manabu

Transactions of JWRI, 2009, 38(1), 1-5

Number of Access:663（2025-08-15 10:59 Counts）

Identifier to cite or link to this item: https://doi.org/10.18910/5250

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Title
Numerical Analysis of Current Attachment at Thermionic Cathode for Gas Tungsten Arc at Atmospheric Pressure
Creator
CreatorName
Yamamoto, Kentaro
NRID
1000070432424 1000070432424
researchmap permalink
d8dshw3z d8dshw3z
Scopus Author ID
15833130200 15833130200
CreatorName
Tashiro, Shinichi
NRID
1000020243272 1000020243272
researchmap permalink
read0014392 read0014392
Scopus Author ID
25641191700 25641191700
CreatorName
Tanaka, Manabu
Subject
Numerical simulation
Gas tungsten arc
Cathode
Abstract
In a gas tungsten arc at atmospheric pressure, electrons are emitted from a thermionic cathode of the tungsten electrode, of which the work function would be reduced by generally adding an emitter material such as thorium oxide (ThO₂), lanthanum oxide (La₂O₃), and so on. However, there is still a lack of practical understanding of the physical behavior in the electrode region. For example, current attachment at a thermionic cathode is not yet clear. The present paper presents a methodology for predicting the current attachment at a thermionic cathode for the gas tungsten arc at atmospheric pressure in argon. It is suggested that the current attachment at thermionic cathode is dependent on work function, melting point and the Richardson constant of emitter materials.
Publisher
大阪大学接合科学研究所
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
Joining and Welding Research Institute, Osaka University
Source Title
Transactions of JWRI
Volume (Issue)
38(1)
Page
1-5
Date of Issued
2009-09
Language
English
Handle URL
https://hdl.handle.net/11094/5250
DOI
https://doi.org/10.18910/5250
PISSN
03874508
NCID
AA00867058
Access Rights
open access
oaire:version
Version of Record
Category
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.38 No.1 (2009-09)