Semimetal ceramic matrix brake pad and manufacturing method thereof

Abstract

The invention discloses a semimetal ceramic matrix brake pad, the material formulation of which is as follows by weight percentage: 15-30 parts of bonding matrices, 25-50 parts of reinforcing fibers, 10-20 parts of regulators with frictional properties, and 10-30 parts of filling materials; wherein, the bonding matrix mainly takes modified sodium aluminosilicate as inorganic HTAs (high temperature adhesives) and a little of phenolic resin and rubber as organic low-and-medium temperature accessorial adhesives, and the weight ratio of an inorganic ceramic adhesive to an organic adhesive is equal to 5:1; the reinforcing fiber mainly takes steel fiber, cooper fiber, ceramics or mineral fiber as an accessorial reinforcing fiber, and the weight ratio of the steel fiber to the accessorial reinforcing fiber is 10:1; the regulators with frictional properties comprise chromite, graphite and friction dust; the filling materials comprise oil coke and baria. The semimetal ceramic matrix brake pad prepared in the invention is safe and reliable, and the manufacturing method is simple and reliable.

Description

technical field [0001] The invention relates to a brake pad, in particular to a low metal ceramic matrix composite brake pad used in an automobile brake system, and also relates to a preparation method of the automobile brake pad. Background technique [0002] Automobile brake pads are the key components of Class A of the automobile braking system, and their performance is directly related to the safety and reliability of automobile operation. At present, the mainstream automobile brake pads on the market are all made of semi-metal or metal-less resin-based friction materials. When the car is in continuous or emergency braking, the temperature on the surface of the brake pads and brake discs is as high as 500-700 ° C. Due to the resin-based brake pads Poor temperature resistance, it will decompose and release water, gas, oil, etc. at high temperature, and form a thin film on the friction surface, making dry friction into mixed friction or wet friction, the friction coefficie...

AI Technical Summary

Problems solved by technology

At present, the mainstream automobile brake pads on the market are all made of semi-metal or metal-less resin-based friction materials. When the car is in continuous or emergency braking, the temperature on the surface of the brake pads and brake discs is as high as 500-700 ° C. Due to the resin-based brake pads Poor temperature resistance, it will decompose and release water, gas, oil, etc. at high temperature, and form a thin film on the friction surface, making dry friction into mixed friction or wet friction, the friction coefficient is significantly reduced, and there is a hidden danger of brake failure. Due to the large amount of thermal decomposition of the resin, its bonding effect is reduced, and the high temperature wear of the material is aggravated, resulting in a significant reduction in the service life of the brake pads

At present, some ceramic automobile brake pads on the market use a large amount of ceramic fibers instead of traditional steel fibers. Although their braking comfort performance (including noise, ash falling, and matching with the pair, etc.) has been significantly improved, resin is still used as the main material. Adhesives, which lead to problems such as high-temperature thermal recession, easy cracks and poor high-temperature wear performance at high temperatures

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