2023 Fiscal Year Final Research Report
Elucidation of crack formation and gold transfer phenomena induced by applying voltage to gold/glass and application to glass processing
| Project/Area Number |
22K20420
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
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| Project Period (FY) |
2022-08-31 – 2024-03-31
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| Keywords | ガラス / 金 / 陽極接合 / 割断 / アルカリ金属イオン欠乏層 / 亀裂 / 電圧印加 |
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| Outline of Final Research Achievements |
When glass is heated to a high temperature below its softening point, brought into contact with gold, and a DC voltage is applied with the gold side as the anode (hereafter, forward voltage), an alkali metal ion-depleted layer is formed in the glass. Furthermore, when a voltage is applied to the glass with the glass side as the anode (reverse voltage), cracks are formed in the glass and gold migrates into the cracks. In this study, we call this phenomenon the gold inflow phenomenon, and discuss its mechanism. In this study, experiments were conducted in air using a plate heater. As a result, it was found that the gold inflow phenomenon occurred even in air.However, it became clear that the effects of electrical discharges and oxidation of the electrodes could not be ignored in the atmospheric experimental setup.
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| Free Research Field |
電気化学加工
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| Academic Significance and Societal Importance of the Research Achievements |
金流入現象は，ガラスに亀裂を形成することから，新たなガラス割断加工技術への応用が期待できる．特に，本現象はアルカリ金属イオンの移動に着目した現象であることから，難加工材である化学強化ガラスの加工も期待できる．本研究では，金流入現象の加工への応用を実現するため，金流入現象のメカニズムの解明を検討した．その結果，大気中においても金流入現象が生じることが確認され，従来の真空チャンバを用いた場合よりも簡易的な実験装置にて加工が実現できる可能性が示唆された．
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