A kind of Kovar/silver metal layered composite material for space and preparation method thereof

Abstract

The invention relates to a spaceborne Kovar / silver metal laminated composite material and a preparation method thereof. The composite material comprises a Kovar alloy foil piece and two pure silver foils, and is characterized in that the pure silver foils acting as surface layers and the Kovar alloy foil piece acting as an interlayer form a laminated sandwich structure, and the top, middle and bottom layers form chemical bonds through rolling and bonding so as to be connected into an integral whole. The preparation method comprises the steps of laminating the pure silver foils and the Kovar alloy foil piece into a combined blank with a sandwich structure according to a sequence of the pure silver foil, the Kovar alloy foil piece and the pure silver foil; performing hot rolling and composite bonding on the combined blank; performing further annealing processing at the atmosphere of an inert gas after rolling and bonding, and acquiring a spaceborne Kovar / silver metal laminated composite material after annealing processing. The composite material has good space environment adaptability, thermal conductivity, electrical conductivity and weldability, and meets requirements of space electronic packaging applications; and the spaceborne Kovar / silver laminated composite material is simple in production process, sable and controllable in quality, convenient to operate and capable of realizing large-area automatic roll-to-roll batch production.

Description

technical field

[0001] The invention relates to the field of aerospace equipment and methods, in particular to a Kovar / silver metal layered composite material for space and a preparation method thereof. Background technique

[0002] The development of space technology and the high cost of space launch put forward new requirements for the normal on-orbit operation life of spacecraft. Due to the harsh space environment, the effect on the surface materials of the spacecraft is complex and changeable. The solar cell array working on the surface of the spacecraft for a long time will be eroded by high-energy particles, micro-meteorites, space debris, atomic oxygen, etc., which will affect the normal life of the aircraft on orbit. .

[0003] The solar cell array is an array formed by connecting single gallium arsenide solar cells in series through metal interconnections. At present, the interconnection metal materials used in space solar cell arrays are mainly pure silver interco...

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