Active anti-corrosion SnZn base brazing filler metal, manufacturing method thereof and low-temperature ultrasonic brazing method of ceramic and/or composite material and aluminum and magnesium alloy

The invention provides active anti-corrosion SnZn base brazing filler metal and an active anti-corrosion SnZn base brazing filler metal low-temperature ultrasonic brazing method of ceramic and/or a composite material and aluminum and magnesium alloy and belongs to the technical field of brazing of ceramics and ceramic base composite materials. The active anti-corrosion SnZn base brazing filler metal and the method aim at solving the problem that brazing can be conducted only under the high temperature and weld cracks are generated due to residual heat stress formed in the cooling process by means of the existing ceramic and/or ceramic-based composite material connection technology. The active anti-corrosion SnZn base brazing filler metal is composed of Sn, Zn, Al, Ag and misch metal (RE). The manufacturing method includes the steps that a muffle furnace is heated, Ar gas is injected into the muffle furnace, Ag in a crucible is heated to be molten, Zn, Al, Sn and the misch metal are added in sequence, and the temperature is kept for 30 minutes. The brazing method includes the steps that pressure is applied, an ultrasonic tool head is directly pressed to a workpiece to be welded in a clamping tool to be heated to 270 DEG C to 300 DEG C under the atmosphere environment, and ultrasonic brazing is conducted. The active anti-corrosion SnZn base brazing filler metal and the method are used for connection of ceramic, sapphires, silicon wafers, glass, aluminum alloy, magnesium alloy, composite materials containing ceramic particles and the like through ultrasonic brazing, wherein the composite materials comprises aluminum alloy containing the ceramic particles, magnesium alloy containing the ceramic particles, titanium alloy containing the ceramic particles and the like.