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Brazing method of high-volume-fraction silicon carbide particle reinforced aluminum matrix composite material and aluminum-silicon alloy

A technology of silicon carbide particles and high volume fraction, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of poor performance of welding joints and failure to meet the requirements of electronic packaging shells, so as to achieve beautiful weld seams and avoid self- The roughness of the organization and the effect of simple equipment

Active Publication Date: 2019-12-17
HUNAN HARVEST TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a brazing method of high volume fraction silicon carbide particle reinforced aluminum matrix composite material and aluminum silicon alloy to solve the problems caused by the brazing of aluminum silicon alloy and high volume fraction silicon carbide particle reinforced aluminum matrix composite material. The restriction of the surface oxide film leads to poor performance of solder joints and technical problems that cannot meet the requirements of electronic packaging shells

Method used

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  • Brazing method of high-volume-fraction silicon carbide particle reinforced aluminum matrix composite material and aluminum-silicon alloy
  • Brazing method of high-volume-fraction silicon carbide particle reinforced aluminum matrix composite material and aluminum-silicon alloy
  • Brazing method of high-volume-fraction silicon carbide particle reinforced aluminum matrix composite material and aluminum-silicon alloy

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Embodiment 1

[0057] In this embodiment, the brazing method of high volume fraction silicon carbide particle reinforced aluminum matrix composite material and aluminum-silicon alloy is carried out according to the following steps:

[0058] S1. First, the aluminum-based composite material with a volume fraction of silicon carbide particle reinforcement phase of 63% (referred to as 63% SiC p / Al composite material) and an aluminum-silicon alloy (CE11 alloy for short) with a mass fraction of Si particles of 50% are mechanically polished, then ultrasonically cleaned with absolute ethanol for 10 min, and then taken out and air-dried for later use.

[0059] S2. Weigh 0.005g of SiC powder with a particle size of 1 μm, mix SiC powder and 30ml of absolute ethanol into a beaker with a diameter of 50mm, and obtain a mixed solution of SiC powder and absolute ethanol; Immerse the rod in the mixed solution of SiC powder and absolute ethanol, turn on the ultrasonic vibration, control the ultrasonic vibrat...

Embodiment 2

[0064] In this embodiment, the brazing method of high volume fraction silicon carbide particle reinforced aluminum matrix composite material and aluminum-silicon alloy is carried out according to the following steps:

[0065] S1. First, the aluminum matrix composite material with a volume fraction of SiC particle reinforcement phase of 80% (referred to as 80% SiC p / Al composite material) and an aluminum-silicon alloy (CE19 alloy for short) with a mass fraction of Si particles of 20% are mechanically polished, then ultrasonically cleaned with absolute ethanol for 10 min, and then taken out and air-dried for later use.

[0066] S2. Weigh 0.012g of SiC powder with a particle size of 5 μm, mix SiC powder and 30ml of dehydrated ethanol into a beaker with a diameter of 50mm to obtain a mixed solution of SiC powder and dehydrated ethanol; Immerse the rod in the mixed solution of SiC powder and absolute ethanol, turn on the ultrasonic vibration, control the ultrasonic vibration frequ...

Embodiment 3

[0071] In this embodiment, the brazing method of high volume fraction silicon carbide particle reinforced aluminum matrix composite material and aluminum-silicon alloy is carried out according to the following steps:

[0072] S1. First, the aluminum matrix composite material with a volume fraction of SiC particle reinforcement phase of 50% (referred to as 50% SiC p / Al composite material) and an aluminum-silicon alloy (CE17 alloy for short) with a Si particle mass fraction of 27% are mechanically polished, then ultrasonically cleaned with absolute ethanol for 10 min, and then taken out and air-dried for later use.

[0073] S2. Weigh Al with a particle size of 1 μm 2 o 3 Powder 0.01g, Al 2 o 3 Powder and 30ml of absolute ethanol are mixed into a beaker with a diameter of 50mm to obtain Al 2 o 3 A mixed solution of powder and absolute ethanol; immerse the horn of the ultrasonic transducer in Al 2 o 3 In the mixed solution of powder and absolute ethanol, turn on the ultras...

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Abstract

The invention discloses a brazing method of a high-volume-fraction silicon carbide particle reinforced aluminum matrix composite material and an aluminum-silicon alloy. The brazing method includes thefollowing steps that S1, the to-be-welded surfaces of the silicon carbide particle reinforced aluminum matrix composite material and the aluminum-silicon alloy are subjected to surface clearing; S2,ceramic powder is prearranged on the to-be-welded surface of the aluminum-silicon alloy after treatment in the S1; S3, a brazing filler metal is placed between the to-be-welded surfaces of the aluminum-silicon alloy and the silicon carbide particle reinforced aluminum matrix composite material to form a to-be-welded part; and S4, under the protective atmosphere, the to-be-welded part is heated up,kept warm and pressurized to 5-20 MPa, and continuous heat preservation and pressure maintaining are conducted, and then the to-be-welded part is furnace-cooled to the room temperature. According tothe brazing method, oxide films on the surfaces of the silicon carbide particle reinforced aluminum matrix composite material and the aluminum-silicon alloy are broken by using the hard ceramic powderto assist the metal brazing filler metal, the brazing filler metal is fully wetted and spreads on the surfaces of the silicon carbide particle reinforced aluminum matrix composite material and the aluminum-silicon alloy, and metallurgical bonding of the connection surface of the silicon carbide particle reinforced aluminum matrix composite material and the aluminum-silicon alloy is induced.

Description

technical field [0001] The invention relates to the technical field of connection methods for aluminum-based composite materials, in particular to a brazing method for high-volume silicon carbide particle-reinforced aluminum-based composite materials and aluminum-silicon alloys. Background technique [0002] With the development of microelectronic 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 degree of integration is getting higher and higher, and the heat generation density is higher. Thermal requirements for component enclosures are becoming increasingly stringent. Traditional electronic packaging housing materials such as Kovar, W / Cu, and Mo / Cu alloys cannot meet the performance requirements due to their large specificities and low thermal conductivity. High volume fraction (vol.%, 40% to 80%) silicon carbide particles reinforc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B23K1/20
CPCB23K1/00B23K1/0008B23K1/20
Inventor 肖静贾进浩陈迎龙肖浩熊德赣陈柯杨盛良
Owner HUNAN HARVEST TECH DEV
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