pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (26권2호 92-97)
The Effect of the Sn Amounts on the Microstructure of Rapidly Solidified Ag-Sn-In Alloys
급속응고한 Ag-Sn-In 합금의 미세조직에 미치는 Sn 함량 변 화 영향
Dae-Hyoung Cho，Gi-Bong Kwon, Tae-Woon Nam
Machinery & Material Center, Hang Yang University
Contact material is widely used as electrical parts. Ag-Cd alloy has a good wear resistance and stable contact resistance. But the disadvantages of Ag-Cd alloy are coarse Cd oxides and harmful metal, Cd. To solve the disadvantages of that, Ag-Sn alloy that has stable and fine Sn oxide at high temperature has been developed. In order to optimize Sn amount that affects the formation of the oxide layer on the surface, we worked for the microstructures and properties of Ag-Sn material fabricated by rapid solidification process. The experimental procedure were melting using high frequency induction, melt spinning, and internal oxidation. We have shown that the optimized Sn amount for high hardness is 7.09 wt%Sn. Surface oxide layer forms when Sn amount is over 9.45 wt%. The size of Sn oxide is 20 nm.
Contact material, Internal oxidation, Oxide particle, Ag-Sn, Rapid solidification process.