Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Analysis of Bonding Characteristics of Ag-System Brazing Filler Metal

은계 필러메탈 브레이징 접합부의 특성 분석

  • Soon-Gil Lee (Department of Material Convergence System Engineering, Changwon National University) ;
  • Hwa-In Lee (Department of Material Convergence System Engineering, Changwon National University) ;
  • Jin-Oh Son (Vito Inc.) ;
  • Gwang-Il Ha (Vito Inc.) ;
  • Bon-Heun Koo (Department of Material Science and Engineering, Changwon National University)
  • 이순길 (창원대학교 소재융합시스템공학과) ;
  • 이화인 (창원대학교 소재융합시스템공학과) ;
  • 손진오 (주식회사 비토) ;
  • 하광일 (주식회사 비토) ;
  • 구본흔 (창원대학교 신소재공학부)
  • Received : 2022.12.26
  • Accepted : 2023.04.20
  • Published : 2023.05.27
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Abstract

As a filler metal for lowering the melting point of Ag, many alloy metal candidates have emerged, such as cadmium, with zinc, manganese, nickel, and titanium as active metals. However, since cadmium is known to be harmful to the human body, Cd-free filler metals are now mainly used. Still, no study has been conducted comparing the characteristics of joints prepared with and without cadmium. In addition, studies have yet to be conducted comparing the typical characteristics of brazing filler metals with special structures, and the joint characteristics of brazing filler metals with available frames. In this study, the characteristics of junctions of silver-based intercalation metals were compared based on the type of filler metal additives, using a special structure, a filler metal sandwich structure, to protect the internal base metal. The general filler metal was compared using the structure, and the thickness of the filler metal according to the thickness was reached. A comparison of the characteristics of the junction was conducted to identify the characteristics of an intersection of silver-based brazing filler metal and the effect on joint strength. Each filler metal's collective tensile strength was measured, and the relationship between joint characteristics and tensile joint strength was explored. The junction was estimated through micro strength measurement, contact angle measurement with the base metal when the filler metal was melted, XRD image observation, composition analysis for each phase through SEM-EDS, and microstructure phase acquisition.

Keywords

Acknowledgement

This work was supported by project for Industry-Academic Cooperation Based Platform R&D funded Korea Ministry of SMEs and Startups in 2020 (Project No. S3025630). This results was supported by "Regional Innovation Strategy (RIS)" through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE) (2021RIS-003).

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