Surface tension of liquid metal under plasma environment
| Project/Area Number |
13450310
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | Osaka University |
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Principal Investigator |
NOGI Kiyoshi NOGI,Kiyoshi, 接合科学研究所, 教授 (40029335)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUMOTO Taihei MATSUMOTO,Taihei, 接合科学研究所, 助手 (30294135)
FUJII Hidetoshi FUJII,Hidetoshi, 接合科学研究所, 助教授 (00247230)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥12,800,000 (Direct Cost: ¥12,800,000)
Fiscal Year 2003: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2002: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2001: ¥7,100,000 (Direct Cost: ¥7,100,000)
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| Keywords | Surface tension / Plasma / surface active element / sulfur / ステンレス鋼 / 溶接 / 溶融池形状 / アーク溶接 / 溶け込み深さ / 溶融金属 |
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| Research Abstract |
Effect of Plasma on surface tension of liquid SUS 304 stainless steel containing various S concentration were measured in a wide temperature range and the following results were obtained.
1.Surface tension of liquid SUS 304 stainless steel decreases with increasing S concentration and sulfur acts as surface active element.
2.Temperature coefficient of surface tension of liquid stainless steel depends on sulfur concentration and can be written as follows ;
γ=176-0.12(T-1480) mN/m・・・10ppmS
γ=1530+0.29(T-1480) mN/m・・・110ppmS
γ=1380+0.49(T-1480) mN/m・・・250ppmS
3.It can be considered that sulfur is adsorbed at the liquid stainless steel surface as ionic state which is calculated from a maximum surface excess quantity.
4.Plasma does not effect on the surface tension of liquid stainless steel in the present work.
5.Density of liquid stainless steel can be expressed as ;
ρ=7.04-0.616(T-1480) g/cm13
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Report
(4 results)
Research Products
(10 results)
