Mo/Ag laminated metal matrix composite for solar cell interconnected sheet and preparation process thereof

Abstract

The invention relates to a Mo / Ag laminated metal matrix composite for solar cell interconnected sheets and a preparation process thereof. By employing a vacuum metal plasma implantation technology, the invention comprises the steps of implanting metallic elements according to certain energy and dosage into molybdenum foil interconnected sheet materials processed by burnishing, degreasing and acidpickling activation; plating silver on the surface of molybdenum foils by a non-cyanide electroplating method; and conducting high temperature annealing under the protection of argon so that the metallic element of silver diffuses and penetrates into the molybdenum foils to form a metallurgical binding with Mo / Ag interfaces and finally to obtain the Mo / Ag laminated metal matrix composite having high interfacial binding strength and high welding strength. The welding (interfacial) strength of the composite reaches 460gf by single-point resistance spot welding. According to the invention, the Mo / Ag laminated metal matrix composite is prepared without adding an intermediate metal layer and cyanide electroplated silver. The ground testing is conducted and the performance requirement is achieved.

Description

technical field [0001] The invention relates to the preparation technology of metal matrix composite materials, especially a preparation process and device of molybdenum / silver (Mo / Ag) layered metal matrix composite materials for long-life aerospace vehicle solar cell sail interconnection sheets, specifically a new A technology for the fabrication of long-life spacecraft solar cell sail interconnects using molybdenum / silver layered metal matrix composites. Background technique [0002] Molybdenum and molybdenum alloys have excellent heat resistance, high temperature mechanical properties, low molybdenum thermal expansion coefficient and high thermal conductivity. Among them, the low thermal expansion coefficient and high thermal conductivity make molybdenum and molybdenum alloys very resistant to thermal shock, and their thermal response is very low after being made into a structure. In addition, molybdenum is not ferromagnetic. [0003] Because of these characteristics, m...

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Problems solved by technology

[0005] The problem of using molybdenum and molybdenum alloys instead of silver as the interconnect material is that the solderability of molybdenum is relatively poor, and it will be strongly oxidized at high temperatures, and the oxide film has no protective effect

And for molybdenum-silver in the present invention such mutually immiscible system, its heat of formation is positive, it is difficult to produce diffusion to realize alloying, and above-mentioned method is inapplicable

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