Effects of Mm(misch metal) Addition on The Property of Ag-CdO alloys for Electrical Contactor

전기접점용 Ag-CdO합금의 물성에 미치는 Mm(misch metal) 첨가의 영향

It is well known that Ag-CdO alloy for electrical contactor has been widely used in weak or middle electric current field. But it is necessary to decrease Cd contents without decrease of contactor property because Cd is harmful to human body. The present work has been carried out to investigate effects of Mm (misch metal) addition on the property of Ag-CdO alloy for electrical contactor. As the results of present works, hardness and strength was improved and arc resistance was improved, also, in spite of decrease Cd contents by the Mm addition. It was estimated that Ag-oxide particle was refined by Mm addition.