Research of welding methods of graphite composite by using B4C and a high power laser

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05083
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26050:Material processing and microstructure control-related
• Research Institution: Shibaura Institute of Technology
• Principal Investigator: Masaki Tadahiko 芝浦工業大学, 工学部, 教授 (00360719)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 溶接接合 / グラファイト / 複合材料

Outline of Final Research Achievements

This research is one of a series of studies to explore the possibility of welded joints of carbon composite materials. In the research during the current grant period, it was found that brazing is possible by using boron carbide with aluminum. The addition of a small amount of aluminum to the boron carbide resulted in a finer microstructure in the weld zone and improved the joint strength. Tensile test results showed that the strength of the weld was about 90% of that of graphite, the base material.

Free Research Field

金属物理化学

Academic Significance and Societal Importance of the Research Achievements

グラファイト系の材料は軽量かつ高強度であるため航空機や自動車などの次世代材料として使用され始めているが、金属のような溶接による接合ができない点で応用範囲が限られてしまっていた。本研究はグラファイト系材料の溶接法を見出すことを目的としており、軽量化を求められる様々な機械への応用が可能である。