Method for preparing silicon aluminum alloy Si-Al powder

Overview of silicon aluminum alloy Si-Al powder

High-silicon aluminum alloy powder is a binary alloy composed of silicon and aluminum, and is a metal-based thermal management material. High-silicon aluminum alloy materials can maintain the excellent properties of silicon and aluminum, and the content of silicon and aluminum is quite abundant. The silicon powder preparation technology is mature and the cost is low. At the same time, this material does not pollute the environment and is harmless to the human body. Why add silicon to aluminum?

When it is added to aluminum, silicon makes the metal alloy more fluid without damaging the metal at high temperatures. Silicon actually lowers the melting point of aluminum. Aluminum does not experience hot tearing because there is no brittleness.

The density of high silicon aluminum alloy is between 2.4~2.7 g/cm³, and the coefficient of thermal expansion (CTE) is between 7-20ppm/℃. Increasing the silicon content can significantly reduce the density and thermal expansion coefficient of the alloy material. At the same time, high-silicon aluminum alloy also has good thermal conductivity, high specific strength and rigidity, good electroplating performance with gold, silver, copper, and nickel, can be welded with the substrate, and easy to precision processing. It is a kind of Electronic packaging materials with broad application prospects, especially in high-tech fields such as aerospace, space technology, and portable electronic equipment. Tanki is the world's trusted supplier of silicon aluminum alloy Si-Al powder. Please feel free to consult the latest price of silicon aluminum alloy.

How is silicon aluminum alloy Si-Al powder produced?

Preparation method of silicon aluminum alloy Si-Al powder

(1) Pressureless osmosis method

A method for preparing composite materials by melting aluminum alloy into silicon particle preforms under the action of carbon steel infiltration aids in the air;

(2) Pressure penetration method

By applying an external force, the liquid aluminum metal penetrates into the preform of silicon particles, which promotes the infiltration, wetting and recombination of the silicon particles and the liquid aluminum metal. The usual procedure is to prepare prefabricated silicon particle reinforcement and then cast the permeable composite material.

(3) Vacuum hot pressing method

A sintering process in which pressure forming and pressure sintering are carried out simultaneously under vacuum conditions;

(4) Powder metallurgy method

A method of mixing a certain proportion of aluminum powder, silicon powder and binder through dry pressing, injection and other methods, and sintering in a protective atmosphere to obtain a dense material;

(5) Rapid solidification method

Also known as the rapid solidification method, the solidification degree and the solidification rate can be increased by increasing the solidification cooling rate, so as to achieve the purpose of refining the alloy structure.

Application of silicon aluminum alloy Si-Al powder

What are the uses of silicon aluminum alloy Si-Al powder?

1) High-power integrated circuit packaging: high-silicon aluminum alloy provides effective heat dissipation;

2) Carrier: it can be used as a local heat sink to make the components arranged more closely;

3) Optical frame: high silicon aluminum alloy provides low thermal expansion coefficient, high rigidity and workability;

4) Heat dissipation part: High silicon aluminum alloy provides effective heat dissipation and structural support.

Application of silicon aluminum alloy Si-Al powder in auto parts

High-silicon aluminum alloy material (silicon content 20%-35%) has excellent tribological properties, and can be used as an advanced lightweight wear-resistant material for various transportation vehicles, various power machinery, machine tools, and special fasteners And tools are widely used.

High-silicon aluminum alloy has a series of advantages such as small specific gravity, light weight, good thermal conductivity, low thermal expansion coefficient, stable volume, good wear resistance, and good corrosion resistance. It is widely used as cylinder liners, pistons, automobile engine rotors, and brakes. Plates and other materials.

The price of silicon aluminum alloy Si-Al powder

The price of silicon aluminum alloy Si-Al powder will vary randomly with the production cost of silicon aluminum alloy Si-Al powder, transportation cost, international situation, exchange rate and the supply and demand of silicon aluminum alloy Si-Al powder market. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for silicon aluminum alloy Si-Al powder, please feel free to send an inquiry to get the latest price of silicon aluminum alloy Si-Al powder.

Suppliers of silicon aluminum alloy Si-Al powder

As a global supplier of silicon aluminum alloy Si-Al powder, Tanki New Materials Co., Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.