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AlSiC composite material, preparation method thereof, and Ni-plated AlSiC composite material

A composite material and nickel plating technology, applied in chemical instruments and methods, metal layered products, layered products, etc., can solve problems such as difficulty in forming uniform coatings, and achieve good uniformity

Active Publication Date: 2012-12-12
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the difference between the two phases of SiC and Al on the surface of the composite material makes it difficult to form a uniform and smooth coating during electroless plating, the invention provides an AlSiC composite material, which makes the subsequent electroless nickel plating easier to operate, and the obtained surface electroless plating The uniformity of the nickel layer is greatly improved

Method used

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  • AlSiC composite material, preparation method thereof, and Ni-plated AlSiC composite material

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preparation example Construction

[0018] The present invention also provides the preparation method of the above-mentioned AlSiC composite material, including the following process steps: 1) Raw material preparation: taking the quality of silicon carbide as the benchmark, weighing 0.8-1.2wt% of the modifier and 8.5-14wt% of the dispersion medium, and mixing the three Direct heating and mixing to obtain slurry; 2) Preparation of porous prefabricated body: hot die-casting the slurry to obtain a green body, debinding and pre-sintering the obtained green body to obtain a silicon carbide porous prefabricated body; 3) pressure melting Infiltration: The aluminum alloy solution is used to perform pressure infiltration treatment on the silicon carbide porous prefabricated body to obtain an AlSiC composite material with an aluminum layer with a thickness of 30-150 μm on the surface.

[0019] According to the present invention, the aluminum alloy solution is well known to those skilled in the art, and can be directly purc...

Embodiment 1

[0036] a) Preparation of raw materials, see Table 1 for specific parameters;

[0037] b) Preparation of porous prefabricated body: put the obtained green body in a resistance furnace for debinding and pre-sintering treatment, debinding procedure: heat up to 50°C at a speed of 5°C / min, and then heat up at a speed of 0.3°C / min to 150°C, keep at 150°C for 2h, then raise the temperature to 300°C at a rate of 0.2°C / min, and keep at 300°C for 1h. Pre-sintering treatment: After the debinding is completed, the temperature is raised to 1100 °C at a rate of 10 °C / min for pre-sintering treatment, and the pre-sintering time is 2 hours to obtain a SiC porous preform;

[0038] c) Pressure infiltration: prepared as attached figure 1 For the graphite mold shown, the reserved thickness (the size in the thickness direction is larger than the size of the porous preform) is controlled to be 30 μm, the porous preform is placed in the mold, and the cavity is vacuumed. Finally, inject the 1000°C a...

Embodiment 2

[0040] a) Preparation of raw materials, see Table 1 for specific parameters;

[0041] b) Preparation of porous prefabricated body: the obtained green body is placed in a resistance furnace for debinding and pre-sintering. Debinding program: heat up to 60°C at a speed of 7°C / min, then heat up to 150°C at a speed of 0.2°C / min, keep at 150°C for 3 hours, then heat up to 300°C at a speed of 0.5°C / min, Insulate at 300°C for 2h. Pre-sintering treatment: After the debinding is completed, the temperature is raised to 1000°C at a rate of 10°C / min for pre-sintering treatment, and the pre-sintering time is 1h to obtain a SiC porous preform;

[0042] c) Pressure infiltration: prepared as attached figure 1 For the graphite mold shown, control the reserved thickness (the size in the thickness direction is larger than the size of the porous preform) to 120 μm, place the porous preform in the mold, and draw a vacuum to the cavity. Finally, the 900°C aluminum alloy liquid was injected into ...

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Abstract

The invention discloses an AlSiC composite material and a preparation method thereof. The AlSiC composite material comprises an SiC carrier having a porous structure, wherein Al is filled in the pores of the SiC carrier, and the surface of the SiC carrier is covered with an Al layer having a thickness of 30-150mum; and the Al layer and the Al matrix filled in the pores of the SiC carrier are a continuous distribution phase. The invention also provides an Ni-plated AlSiC composite material. The AlSiC composite material provided by the invention has a good surface chemical-coating homogeneity.

Description

technical field [0001] The invention belongs to the research field of metal-based composite materials, and in particular relates to an AlSiC composite material and a forming process thereof. Background technique [0002] AlSiC (aluminum silicon carbide) composite material has the advantages of low thermal expansion coefficient, high thermal conductivity, high strength and good wear resistance, and has been used as the base and heat sink of high-power modules, the core of printed circuit boards, micro-processing Device cover, electronic device chassis and package housing, etc., showing great potential for development and application. However, due to the high volume fraction of SiC particles in the AlSiC composite material, its welding performance is poor, and oxidation is prone to occur during the welding process, so the purity of the shielding gas is required to be high. Due to the difference in surface materials of AlSiC composite materials, there are two phases of SiC and...

Claims

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Application Information

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IPC IPC(8): B32B15/04B22F3/26
Inventor 徐述荣林勇钊张旭林信平
Owner BYD CO LTD
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