Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지

The Study of the Sn-In Ratio on the Oxidation Reaction of Rapidly Solidified Ag-Sn-In Alloys

급속응고한 Ag-Sn-In 합금의 산화반응에 미치는 Sn-In 첨가량 비율에 관한 연구

  • Published : 2007.03.20
Download PDF
⟨ Previous Next ⟩

Abstract

Contact materials are widely used as electrical parts. Ag-Cd alloy has a good wear resistance and stable contact resistance. But the Cd exists as coarse oxide in alloy so it have an effect on mechanical properties badly. Moreover, the Cd is an injury material to environment. Nowadays, the use of Cd is strictly restricted. Because of these disadvantage, Ag-Sn-In alloy has been developed. In Ag-Sn-In alloy, the Sn : In ratio affects the internal oxidation properties, such as the formation of the oxide layer on the surface. In this work, we changed and optimized the Sn : In ratio variety for good internal oxidation properties. We have shown that a internal oxidation process did not fully completed when the Sn : In ratio is over 4 : 1 because of the Sn oxide layer at surface. The increase of In decelerates the formation of Sn oxide layer.

Keywords

References

  1. D. N. Lee: J. Korean Ins. Met., 'The Internal Oxidation of Ag-Cd alloys', 14(1) (1976) 20-30
  2. G. Bohm and M. Kahlweit: ACTA Met. 12 (1964) 641 https://doi.org/10.1016/0001-6160(64)90036-7
  3. Y. S. Shen, Edward J. Zdanuk and Richard H. Krock: Met. Trans., 'The Effect of Additives from Groups IA and IIA on the Morphology and Properties of Silver-Cadmium Oxide Contacts', 8(1) (1972) 16-25
  4. WEEE, Waste Electrical and Electronic Equipment, 2002/96/EC
  5. RoHS, Restriction of Hazardous Substances), 2002/95/EC
  6. H. Chang, C. H. Pitt, G. G. Alexander, Mat. Sci. eng., 'Electronics Silver Plating of Oxide Particles in Aqueous-Soulution', B8 (1991) 99
  7. A. Verma, T. R. Anantharaman, J. Mat. Sci. 'The internal oxidation behaviour of rapidly solidified silver-tin-indium (Ag-Sn-In) alloy' , 27 (1992) 5623 https://doi.org/10.1007/BF00541633
  8. Dae Hyoung Cho, Gi Bong Kwon, Tae Woon Nam 'The Effect of the Sn Amounts on the Microstructure of Rapidly Solidified Ag-Sn-In Alloys' , J. Kor. Foundrymen's Soc. 26(2) (2006) 39
  9. A. Verma et al : Metal powder report, 'Processing and properties of silver-tin oxide-indium oxide electrical contact materials' 46(1991)53