A welding method of 65% silicon carbide particle reinforced aluminum matrix composites with pure al as the intermediate material layer

A technology of silicon carbide particles and intermediate materials, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of large specific gravity, failure to meet performance requirements, low thermal conductivity, etc., and achieve hardness and tensile strength improvement , Facilitate diffusion welding, good effect of welding seam formation

Active Publication Date: 2022-03-25
SHANGHAI JIAO TONG UNIV
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  • Description
  • Claims
  • Application Information

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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

Method used

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  • A welding method of 65% silicon carbide particle reinforced aluminum matrix composites with pure al as the intermediate material layer
  • A welding method of 65% silicon carbide particle reinforced aluminum matrix composites with pure al as the intermediate material layer
  • A welding method of 65% silicon carbide particle reinforced aluminum matrix composites with pure al as the intermediate material layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Step 1. Surface pretreatment: use wire electric discharge cutting to process the base material to be welded into a block of 10*30*3mm, mechanically polish the base material to be welded with 1000-mesh sandpaper, and coat the surface of the aluminum-based base material The oxide film is broken;

[0059] Step 2. Surface cleaning: immerse the base metal to be welded in acetone to remove grease on the surface of the aluminum-based base metal, immerse in 10% NaOH for 5 minutes, and immerse in 10% HNO 3 5 minutes, use chemical reaction to remove residual oxide film;

[0060] Step 3. After the cleaning is completed, ultrasonically clean with deionized water to clean the surface acid, alkali and SiC particles;

[0061] Step 4. Apply ethylene glycol dibutyl ether evenly on the surface of the base metal to be welded to prevent the surface of the aluminum alloy from being oxidized again;

[0062] Step five, the assembly step before welding, the intermediate material layer is sa...

Embodiment 2

[0066] The difference from Example 1 is that in step six, the temperature is finally raised to 520°C.

Embodiment 3

[0068] The difference from Example 1 is that in step six, the temperature is finally raised to 540°C.

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Abstract

The invention discloses a welding method of a 65% silicon carbide particle-reinforced aluminum-based composite material in which pure Al foil is used as an intermediate material layer. Alcohol dibutyl ether, the intermediate material layer is sandwiched between the welding interfaces of the two base metals to be welded, the intermediate material layer is in contact with the welding interface of the welding base metal to form a contact surface, and the two welding base materials are welded in an overlapping manner. In the graphite mold, the assembly of the welded parts is completed; the components to be welded are put into a vacuum diffusion welding furnace to heat up and pressurize for welding. The surfaces that are in contact with each other, under the action of high temperature and pressure, the connected surfaces are close to each other, and plastic deformation occurs locally. After a certain holding time, the atoms in the intermediate material layer gradually diffuse to the base material to be welded to form an overall reliable connection. The invention can complete the welding without auxiliary brazing filler metal under proper welding temperature and applied pressure, the mechanical properties of the welded joint are 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/24B23K20/02
CPCB23K20/24B23K20/026
Inventor 怀雷付本威邓涛尚文陶鹏宋成轶
Owner SHANGHAI JIAO TONG UNIV
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