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Types Of Friction Material Used In Brake System

Feb. 22, 2024

Friction material used in brakes are crucial components responsible for converting kinetic energy into thermal energy through frictional forces, ultimately slowing down or stopping the vehicle. These materials are typically composed of a mixture of ingredients carefully selected to provide the desired frictional characteristics, wear resistance, thermal stability, and durability.

There are several types of friction materials used in braking systems:

Non-Asbestos Organic (NAO): NAO friction materials are made from a mixture of organic fibers, such as cellulose, aramid, and synthetic resins, bonded together with fillers and modifiers. They offer smooth braking performance, low noise, and good initial bite. NAO materials are commonly used in passenger vehicles and light-duty applications due to their low cost and low wear rates.

Semi-Metallic: Semi-metallic friction materials contain a mixture of metallic fibers, such as steel or copper, along with organic fibers and fillers. They offer improved heat dissipation and higher friction levels compared to NAO materials, making them suitable for heavier vehicles, trucks, and performance applications. Semi-metallic pads can generate more brake dust and noise compared to NAO pads.

Ceramic: Ceramic friction materials are composed of ceramic fibers, non-ferrous filler materials, and bonding agents. They offer excellent heat resistance, low noise, and minimal brake dust generation. Ceramic pads provide consistent braking performance and are suitable for high-performance vehicles, luxury cars, and applications where reduced wear and noise are desired.

Carbon-Ceramic: Carbon-ceramic brake pads contain a combination of ceramic fibers and carbon particles, providing superior thermal stability, fade resistance, and longevity compared to traditional friction materials. Carbon-ceramic pads are commonly used in high-performance vehicles, racing cars, and exotic sports cars due to their exceptional braking performance and durability.

Carbon-Fiber: Carbon-fiber friction materials consist of carbon fibers embedded in a resin matrix. They offer high thermal stability, excellent fade resistance, and consistent braking performance under extreme conditions. Carbon-fiber pads are used in racing, motorsports, and high-performance applications where maximum braking performance is required.

Kevlar®: Kevlar® is a high-strength synthetic fiber that can be used in friction materials to provide excellent wear resistance, high temperature stability, and consistent braking performance. Kevlar®-based brake pads are commonly used in racing and performance applications where durability and fade resistance are critical.

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