Green silicon carbide F150 F180 grits are usually for brake abrasion. Green carborundum is a non-metallic material. However, by adding SiC to the powder metallurgy, the sintered brake will get better performance. It has the characteristics of good thermal conductivity, wear resistance, and strong heat resistance. The excellent brake pads with SiC are mainly due to the characteristics of green silicon carbide abrasive sand:
1. Good thermal stability.
The green silicon carbide sand is of high thermal performance. The thermal conductivity ranges from 80 to 160W/(K · M). Even at a high temperature of 1000 degrees, its thermal conductivity is higher than other non-metallic substances such as corundum. The temperature of brake pads will quickly rise to 150 degrees, and in some cases can reach over 300 degrees. The good thermal conductivity of green silicon carbide can quickly transfer heat out. Therefore, it enhances the brake stability.
2. Lower thermal expansion coefficient.
The thermal expansion coefficient of green silicon carbide at 0-1600 degrees Celsius is 7-9 x10-6/℃. It’s hard to deform at high temperatures, thus preventing the brake discs from repeatedly braking from maintaining good shape.
3. High friction coefficient.
Green silicon carbide has high wear resistance and hardness. Thus it can provide high braking efficiency and stability. That means that the heat and braking force generated by the friction between the brake pads and brake discs will be higher, thereby reducing the braking time. In addition, the wear-resistant properties of green silicon carbide can also extend the service life of brake pads, resulting in higher cost-effectiveness.
Green silicon carbide can not only be used for airplane or aircraft brake discs but also in civil fields such as braking systems of automobiles and motorcycles. The most adopted grits are green silicon carbide abrasive sand F150, F180, and green silicon carbide powder 3000 # 4000 #.
