Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The Effect of the Te on the Microstructure of Rapidly Solidification Ag-Sn-In Contact Material

급속응고한 Ag-Sn-In계 접점재료의 미세조직에 미치는 Te 의 영향

  • Published : 2007.01.01
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Abstract

Contact material is widely used as electrical parts. Ag-CdO has a good wear resistance and stable contact resistance. But the disadvantages of Ag-Cd alloy are coarse Cd oxides and harmful metal, Cd. Then Ag-Sn alloy that has stable and fine Sn oxide at high temperature has been developed. In order to investigate the effect of Te additional that affects the formation of the oxide layer on the surface and the formation of oxide in matrix Ag, we studied the microstructures and properties of Ag-Sn-In(-Te) material fabricated by rapid solidification process. The experimental procedure were melting using high frequency induction, melt spinning, and internal oxidation. Specimens were examined and analyzed by Transmission electron microscopy(TEM), energy dispersive X-ray spectroscopy(EDS) and Vickers hardness. As a result, internal oxidation was completed even at $600^{\circ}C$. Te forms coarse $In_{2}TeO_{6}$ phase and makes fine and well dispersed $SnO_{2}$ Phase. 0.3 wt% Te shows favorable properties.

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References

  1. D. N. Lee, 'The internal oxidation of Ag-Cd alloys', J. Korean Ins. Met., Vol. 14, No.1, p. 20. 1976
  2. G. Bohm and M. Kahlweit, 'On internal oxidation of metallic alloys', ACTA Met., Vol. 12, p. 641, 1964
  3. Y. S. Shen, Edward J. Zdanuk, and Richard H. Krock, 'The effect of additives from gropps IA and IIA on the morphology and properties of silver-cadmium oxide contacts', Met. Trans., Vol. 8, No.1, p. 16, 1972
  4. WEEE, Waste Electrical and Electronic Equipment
  5. RoHS, Restriction of Hazardous Substances
  6. H. Chang, C. H. Pitt, and G. G. Alexander, 'Electroless silver plating of oxide particles in aqueous-soulution', Mat. Sci. eng., Vol. 8, p. 99, 1991 https://doi.org/10.1016/0921-5107(91)90023-O
  7. X. M. Liu, S. L. Wu, Paul K. Chu, C. Y. Chung, J. Zheng, and S. L. Li, 'Effects of coating process on the characteristics of Ag-$SnO_{2}$ contact materials', Materials Chemistry and Physics, Vol. 98, No. 2-3, p. 477, 2006 https://doi.org/10.1016/j.matchemphys.2005.09.067
  8. A. Verma and T. R. Anantharaman, 'The internal oxidation behaviour of rapidly solidified silver-tin-indium (Ag-Sn-In) alloy', J. Mat. Sci., Vol. 27, p. 5623, 1992 https://doi.org/10.1007/BF00541633
  9. M. Poniatowski, E. Schulz, and A. wirths, 'Replacement of silver - cadmium oxide with silver - tin oxide in. low-voltage switching devices', Proc. 8th Int. Conf. on Electrical Contact, Vol. 32, p. 30, 1978
  10. J. W. Lee and H.-C. Lee, 'Effects of tellurium addition on othe internal oxidation of Ag-Sn alloys', Scripta mater., Vol. 42, p. 169, 2000
  11. P. B. Joshia, Prabha S. Krishnan, R. H. Patel, V. L. Gadgeel, P. ramakrishnan, and V. K. Kaushik, 'Effect of lithium addition on the density and oxide-phase morphology of Ag-ZnO electrical contact materials', Materials Letters, Vol. 33, p. 137, 1997 https://doi.org/10.1016/S0167-577X(97)00091-8
  12. D. H. Cho, G. B. Kwon, and T. W. Nam, 'The effect of the sn amounts on the microstructure of rapidly solidified Ag-Sn-In alloys', J. Kor. Found. Soc., Vol. 26, No. 2, p. 92, 2006
  13. J. W. Lee, 'The effect of Sn on the internal oxidation and microstructure of Ag-Cd alloys', Seoul Nat. Univ. Master's Thesis, p. 51, 1993