Welding method of 65% silicon carbide particle reinforced aluminum matrix composite adopting pure Al as intermediate material layer

Abstract

The invention discloses a welding method of a 65% silicon carbide particle reinforced aluminum matrix composite adopting pure Al as an intermediate material layer. After surface pretreatment and surface cleaning are carried out on to-be-welded base materials, the surfaces of the to-be-welded base materials are coated with ethylene glycol dibutyl ether, the intermediate material layer is clamped between welding interfaces of the two to-be-welded base materials, the intermediate material layer is in contact with the welding interfaces of the welded base materials to form a contact surface, the two welded base materials are welded in a lap joint manner and placed into a graphite mold, and assembling of a to-be-welded part is completed; and a to-be-welded assembly is placed in a vacuum diffusion welding furnace to be heated and pressurized for welding, the connected surfaces of the mutual contact surfaces get close to each other under the action of high-temperature pressure, plastic deformation occurs locally, and atoms of the intermediate material layer are gradually diffused to the to-be-welded base materials after a certain heat preservation time, so that integral reliable connection is formed. According to the method, welding can be completed without auxiliary brazing filler metal at the appropriate welding temperature and under the appropriate pressure intensity, the mechanical property of a welded joint is good, and the welding effect is good.

Description

technical field [0001] The invention relates to the technical field of welding silicon carbide particle-reinforced aluminum-matrix composite materials, in particular to a welding method for 65% silicon carbide particle-reinforced aluminum-matrix composite materials in which pure Al is used as an intermediate material layer. The welding method does not use auxiliary solder, thereby avoiding Other redundant by-products are generated in the middle reaction layer, which reduces the influence of by-products on the performance of the welding layer, and the thermal expansion rate of the composite material can be regulated by adjusting the components, which can realize direct integration with heat sources of different materials. Background technique [0002] With the development of electronic devices and semiconductor integrated circuits in the direction of high reliability, high integration, high density and light weight, the number of microelectronic components is increasing, the d...

AI Technical Summary

Problems solved by technology

Traditional molybdenum-copper alloys, tungsten-copper alloys, etc. are gradually unable to meet the performance requirements due to their large specific gravity and low thermal conductivity. High-volume silicon carbide particle-reinforced aluminum matrix composites (Al / SiC p ) become an ideal choice to replace traditional electronic packaging materials

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