Scope of application and production process of Si-Al alloy Si-Al powder

Overview of Si-Al alloy Si-Al powder

Silicon aluminum alloy is a binary alloy composed of silicon and aluminum, and is an alloy material mainly used in aerospace, space technology and portable electronic devices.

Silicon aluminum alloy production process

1) Melting and casting method

The smelting and casting method has simple equipment, low cost and can realize large-scale industrial production. It is the most widely used preparation method for alloy materials. Using conventionally cast high-silicon aluminum alloys, the distribution of Si is extremely uneven, cracks are prone to occur during processing, and the material has severe component segregation, coarse grains, and poor mechanical properties. As the silicon content in the alloy increases, the problem becomes more prominent, so it is difficult to prepare high-silicon aluminum alloy materials by conventional casting.

2) Impregnation method

The infiltration method is divided into pressure infiltration method and pressureless infiltration method. The pressure infiltration method is to pressurize the base metal melt into the reinforcement gap by mechanical pressure or compressed gas, which can solve the problem of incomplete infiltration due to the non-wetting of the reinforcement material and the metal liquid, but the pressure system is relatively complex. , thus restricting its application development

3) Powder metallurgy

The main process of powder metallurgy is to uniformly disperse a certain proportion of aluminum powder, silicon powder and binder, mix the powder by dry pressing, injection and other methods, and finally sinter in a protective atmosphere to form a relatively dense material. This method solves the problem of poor wettability between silicon particles and aluminum matrix, and it is difficult for silicon particles to be added into the melt, and the material can be formed at one time with less cutting process, which overcomes the disadvantage that metal matrix composite materials are difficult to process. However, this method is complicated in process, difficult to precisely control, not compact, and high in cost.

4) Vacuum hot pressing method

The vacuum hot pressing method refers to a sintering process in which pressure molding and pressure sintering are carried out at the same time. The general process is as follows: under vacuum conditions, the powder is installed in the mold cavity, and the powder is heated while pressing, and a dense and uniform material is formed after a short time of pressing. However, due to the complex process and poor operability, the application of this technology in the preparation of high-silicon aluminum alloys is limited.

5) Rapid cooling/jet deposition

Rapid cooling/spray deposition technology is a rapid solidification technology developed to compete with powder metallurgy and other technologies to overcome the problems of complex procedures and serious oxidation. Because this process has incomparable advantages over other processes, it has developed rapidly in recent years. Rapid cooling/spray deposition has the following advantages: 1) no macrosegregation; 2) fine and uniform equiaxed microstructure; 3) fine primary precipitates; 4) low oxygen content; 5) improved hot workability.

Application of silicon aluminum alloy 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 more closely arranged;

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

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

Silicon aluminum alloy powder price

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

Silicon aluminum alloy Si-Al powder supplier

As a global supplier of silicon-aluminum alloy Si-Al powders, 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.