Fabrication of High Luminance Filament by Non-contact Discharge Welding

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630297
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: National Institute for Materials Science
• Principal Investigator: KONNO Takeshi 独立行政法人物質・材料研究機構, 先端材料プロセスユニット, 主幹研究員 (50354171)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 電子・電気材料 / 材料加工・処理 / 微小溶接 / グロー放電 / マイクロ・ナノデバイス / 高輝度フィラメント / SEM

Outline of Final Research Achievements

In this study, we have successfully fabricated tungsten filament for thermion emitting electron guns. Two tungsten/tungsten alloy wires of 50μm were welded by non-contact discharge welding method and make a reversed V shape structure. The point radius was smaller than that of the common hairpin filament. It will, therefore, expect to show a good thermal electron emission property. The reversed V shape structure was mounted to an SEM instead of hairpin filament. Good images were obtained comparing with those taken by the same SEM mounted a common hairpin filament.

Free Research Field

工学