What is silicon aluminum alloy

Submitted by admin on Fri, 11/30/2018 - 09:06

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

Silicon aluminum alloy is a binary alloy composed of silicon and aluminum and is a metal-based thermal management material. Silicon aluminum alloy material can maintain the excellent performance of silicon and aluminum, and the content of silicon and aluminum is quite rich. The preparation technology of silicon powder is mature and the cost is low. At the same time, this material has no pollution to the environment and is harmless to the human body.

The density of the silicon aluminum alloy is between 2.4 and 2.7 g/cm3, and the coefficient of thermal expansion (CTE) is between 7 and 20 ppm/°C. 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 plating performance with gold, silver, copper and nickel, and can be welded with the substrate, easy to precision machining and other superior performance. A promising electronic packaging material, especially in high-tech fields such as aerospace, space technology and portable electronics.

There are several main methods for preparing Silicon aluminum alloy composite materials:
1) smelting casting;
2) impregnation method;
3) powder metallurgy;
4) vacuum hot pressing method;
5) Rapid cooling/spray deposition method.