The Influence of Mechanical Alloying and Plastic Consolidation on the Resistance to Arc Erosion of the Ag–Re Composite Contact Material |
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| Authors: | Dariusz Koł acz,Stanisł aw Księ ż arek,Piotr Borkowski,Joanna Karwan-Baczewska,Marcin Lis,Mał gorzata Kamiń ska,Barbara Juszczyk,Joanna Kulasa,Aleksander Kowalski,Ł ukasz Wierzbicki,Krzysztof Marszowski,Mariusz Jabł oń ski |
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| Affiliation: | 1.Łukasiewicz Research Network-Institute of Non-Ferrous Metals, 5 Sowińskiego Str., 44-100 Gliwice, Poland; (S.K.); (M.L.); (M.K.); (B.J.); (J.K.); (A.K.); (Ł.W.); (K.M.);2.Department of Electrical Apparatus, Lodz University of Technology, 18/22 B. Stefanowskiego Str., 90-924 Łódź, Poland; (P.B.); (M.J.);3.Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Krakow, Poland; |
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| Abstract: | The article presents the influence of mechanical alloying and plastic consolidation on the resistance to arc erosion of the composite Ag–Re material against the selected contact materials. The following composites were selected for the tests: Ag90Re10, Ag95Re5, Ag99Re1 (bulk chemical composition). Ag–Re materials were made using two methods. In the first, the materials were obtained by mixing powders, pressing, sintering, extrusion, drawing, and die forging, whereas, in the second, the process of mechanical alloying was additionally used. The widely available Ag(SnO2)10 and AgNi10 contact materials were used as reference materials. The reference AgNi10 material was made by powder metallurgy in the process of mixing, pressing, sintering, extrusion, drawing, and die forging, while the Ag(SnO2)10 composite was obtained by spraying AgSniBi alloy with water, and then the powder was pressed, oxidized internally, sintered, extruded into wire, and drawn and die forged. The tests of electric arc resistance were carried out for loads with direct current (DC) and alternating current (AC). For alternating current (I = 60 A, U = 230 V), 15,000 switching cycles were made, while, for constant current 50,000 (I = 10 A, U = 550 V). A positive effect of the mechanical alloying process and the addition of a small amount of rhenium (1% by mass) on the spark erosion properties of the Ag–Re contact material was found. When DC current of 10 A was used, AgRe1 composite was found to be more resistant than commonly used contact materials (AgNi10 and Ag(SnO2)10). |
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| Keywords: | contact material composite mechanical alloying pressing sintering extrusion arc erosion electrical properties |
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