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A silver alloy made of nickel in silver contacts. Participating in a small amount of nickel can refine the grain size, enhance the hardness, wear resistance, and burn resistance of silver, and slightly add touch resistance. Due to the immiscibility of silver and nickel, they are prepared by powder metallurgy method, usually with a nickel content of 5% to 40%. Silver nickel alloy electrical contact materials have outstanding conductivity and thermal conductivity, strong resistance to metal handling, arc burning, electrical corrosion, etc., good wear resistance, high strength, and outstanding ductility and cutting ability. The touch resistance is higher than that of silver. The physical functions of silver nickel alloy are shown in the table. In the past, the preparation of silver nickel alloys mostly used chemical co stacking method to obtain silver and nickel mixed powder, and later used chemical method to form silver and nickel coated powder. Chemical powder making is usually a messy process with high costs. With the development of powder making skills, in recent years, mechanical atomization method has been used to obtain extremely fine powder, which is then mixed, restricted, sintered, and kneaded to produce silver nickel alloys with the same and reliable functions. Recently, silver and nickel co spraying powder production and mechanical alloying techniques have been developed, resulting in better data functionality. In silver nickel alloys, a few rare earth elements can be added to improve their functionality. Silver nickel alloys are commonly used in low-voltage electrical appliances. AgNi10 is mostly used for communication touch devices below 20A; AgNi (15-40) can withstand larger loads. Silver nickel alloy is widely used as a contact material for various switches, controllers, voltage regulators, circuit breakers, car appliances, magnetic starters, and more.