| Project/Area Number |
07555219
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Material processing/treatments
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| Research Institution | Osaka University |
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Principal Investigator |
HIRATA Yoshinori Osaka University, Faculty of Eng., Associate Professor, 工学部, 助教授 (00116089)
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| Co-Investigator(Kenkyū-buntansha) |
URAGAKI Hiroshi Kochi University, Faculty of Education, Associate Professor, 教育学部, 助教授 (10107138)
MIYAMOTO Isamu Osaka University, Faculty of Eng., Professor, 工学部, 教授 (90029273)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥8,100,000 (Direct Cost: ¥8,100,000)
Fiscal Year 1996: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1995: ¥4,600,000 (Direct Cost: ¥4,600,000)
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| Keywords | Arc welding process / Micro-discharge / Electrical breakdown / Pulse discharge / Field emission / Melting spot / STM / 真空絶縁破壊 / インチワ-ム / SEMその場観察 |
|---|
| Research Abstract |
Features of micrometer gap discharge between a wire and a plane has been experimentally investigated in both environments of Scanning Electron Microscope vacuum and the atmosphere. The experimental setup, which is consisted of a thin tungsten electrode, nanometer controlled actuators such as a piezoelectric tripod and an inchworm, and monitoring devices of current and voltage, was constructed. By applying several hundreds voltages to the gap, electrical breakdown and at the same time very small melting of the anode occurs. Diameters of melting spots at the plane specimen depend on the amount of discharge energy. A weld bead like melted zone can be formed by traveling electrode along the surface and applying repeated pulsed voltage for electric discharge.
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