• Title/Summary/Keyword: 한양

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The Effect of the Zn contents on Rapidly Solidified Ag-Zn Electric Contact Materials. (급속응고한 Ag-Zn계 전기접점재료에 미치는 Zn함량의 영향)

  • Kim, Jong Kyu;Jang, Dae Jung;Ju, Kwang Il;Lee, Eun Ho;Um, Seung Yeul;Nam, Tae Woon
    • Korean Journal of Metals and Materials
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    • v.46 no.7
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    • pp.443-448
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    • 2008

  • Contact materials are used in many electrical devices. Ag-Cd alloy has been widely used in electrical part, because Ag-Cd alloy has a good wear resistance and stable contact resistance. But nowadays Ag-Cd alloy isn't being used because of environmental challenges. Currently new research is being done on ($Ag-SnO_2$ and $Ag-SnO_2-In_2O_3$) as an alternative solution to fix any remainly environmental challenges. However $In_2O_3$ is more expensive and Ag-Sn alloy has low wear resistance. According to our research data Zn has a similar physical and chemical property. In this work, so we changed and optimized the Zn oxide to over 4 and added Sn oxide ratio 0.5, 1.0, 1.5wt%. Conclusions from the data recorded from the experiment of $Ag-ZnO-SnO_2$ are as follows.

  • KSCI

Thermodynamic Interactions Among Carbon, Silicon and Iron in Carbon Saturated Manganese Melts (탄소 포화 Mn 합금 용액내 C, Si 및 Fe 사이의 열역학적 상호작용)

  • Paek, Min-Kyu;Lee, Won-Kyu;Jin, Jinan;Jang, Jung-Mock;Pak, Jong-Jin
    • Korean Journal of Metals and Materials
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    • v.50 no.1
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    • pp.45-51
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    • 2012

  • Thermodynamics of carbon in manganese alloy melts is important in manufacturing low carbon ferromanganese and silico-manganese alloys. In order to predict the carbon solubility in liquid $Mn-Si-Fe-C_{sat}$ alloys as a function of melt composition and temperature, thermodynamic interactions among carbon, silicon and iron in carbon saturated liquid manganese should be known. In the present study, the effects of silicon and iron on the carbon solubility in Mn-Si, Mn-Fe and Mn-Si-Fe melts were measured in the temperature range from 1673 to 1773 K. The carbon solubility decreases significantly as silicon and iron contents increase in liquid manganese alloy. The interaction parameters among carbon, silicon and iron in carbon saturated liquid manganese were determined from the carbon solubility data and the Lupis' relation for the interaction coefficient at constant activity.

  • https://doi.org/10.3365/KJMM.2012.50.1.045 인용 KSCI