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Layered aluminium-silica-alumina-silicon carbide composite material capable of laser welding and preparation method thereof

A composite material, aluminum silicon carbide technology, applied in the direction of chemical instruments and methods, metal layered products, layered products, etc., can solve the problem that the airtightness of welds is difficult to meet the requirements, etc.

Inactive Publication Date: 2011-02-16
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shell can be laser welded to the Kovar cover plate, but the airtightness of the weld is difficult to meet the requirements

Method used

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  • Layered aluminium-silica-alumina-silicon carbide composite material capable of laser welding and preparation method thereof
  • Layered aluminium-silica-alumina-silicon carbide composite material capable of laser welding and preparation method thereof
  • Layered aluminium-silica-alumina-silicon carbide composite material capable of laser welding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0027] Weigh 30g of silicone resin and 970g of silicon carbide powder according to a ratio of 3:97, dissolve the silicone resin in acetone to obtain a binder solution, and mix the silicon carbide powder and the binder solution evenly in a mixer to obtain Silicon carbide slurry is granulated by a granulator to obtain silicon carbide granulated powder; according to the ratio of 3:18:79, weigh 30g of silicone resin, 180g of starch and 790g of silicon powder, and dissolve the silicone resin in acetone Prepare a binder solution, mix the silicon powder, starch and the binder solution uniformly in a kneader to obtain a silicon slurry, and use a granulator to granulate to obtain a silicon granulated powder. Weigh 70 g of silicon carbide granulated powder and 20 g of silicon granulated powder respectively. First lay the silicon carbide granulated powder on the bottom layer of the concave mold, then lay the silicon granulated powder on the upper layer of the silicon carbide granulated p...

Embodiment 17

[0029] Weigh 30g of silicone resin, 180g of starch and 790g of silicon carbide powder respectively according to the ratio of 3:18:79, dissolve the silicone resin in acetone to prepare a binder solution, and make the silicon carbide powder, starch Mix with the binder solution evenly to obtain silicon carbide slurry, and use a granulator to obtain silicon carbide granulated powder; weigh 30g of silicone resin, 350g of starch and 620g of silicon powder according to the ratio of 3:35:62, Dissolve the silicone resin in acetone to prepare a binder solution, mix the silicon powder, starch and the binder solution uniformly in a mixer to obtain a silicon slurry, and use a granulator to granulate to obtain a silicon granulated powder. Weigh 80 g of silicon carbide granulated powder and 20 g of silicon granulated powder respectively. First lay the silicon carbide granulated powder on the bottom layer of the concave mold, then lay the silicon granulated powder on the upper layer of the si...

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Abstract

The invention discloses a layered aluminium-silica-alumina-silicon carbide composite material capable of laser welding and a preparation method thereof. The composite material is of a layered structure and composed of an aluminium-silicon alloy layer and an alumina-silicon carbide layer; the volume percentage content of silicon in the aluminium-silicon alloy layer is within 30-60, and the volume percentage content of aluminium in the aluminium-silicon alloy layer is within 40-70; the volume percentage content of silicon carbide in the aluminium-silicon alloy layer is 30-70 and the volume percentage content of aluminum therein is within 30-70%; and aluminum matrixes in the aluminium-silicon alloy layer and the alumina-silicon carbide layer are of a continuous distribution phase. The preparation method comprises the following steps: firstly preparing silicon carbide granulation powder and silicon granulation powder; then preparing layered silicon-silicon carbide prefabricated members; and finally adopting a vacuum liquid-phase pressure infiltration method to prepare the aluminium-silica-alumina-silicon carbide composite material. The composite material of the invention can be subjected to laser welding, has high elastic modulus, high bending strength and high gas tightness, and is suitable for preparing packaging shells which can be subjected to gas tightness welding by the laser.

Description

technical field [0001] The invention relates to an electronic packaging material used in the electronic information industry, in particular to a layered aluminum-silicon-aluminum-silicon carbide composite material which can be welded by laser and a preparation method thereof. Background technique [0002] With the development of the electronic information industry, the integration of chips continues to increase, which makes the operating temperature of the circuit continue to rise. Correspondingly, the requirements for packaging materials are becoming more and more stringent. Not only the packaging materials are required to have higher thermal conductivity, but also the Matching low thermal expansion coefficient, and in order to meet the needs of lightweight, it is also required that the density of the packaging material is as low as possible and the modulus of elasticity is as high as possible. Traditional packaging materials such as metal aluminum, copper, Kovar, tungsten ...

Claims

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Application Information

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IPC IPC(8): B32B15/00B32B9/04
Inventor 白书欣万红熊德赣李顺赵恂陈柯张虹
Owner NAT UNIV OF DEFENSE TECH
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