brakes pads

By acting as a barrier between the rotors and the calipers, brake pads stop metal-on-metal contact, which can cause rotor wear. Premature wear and tear results from the rotors bearing the brunt of the friction when the pads wear down too much 

Ceramic brake pads will be quieter than organic or semi-metallic . Reduced brake dust, and produce a dust that is lighter in color and less likely to stick to wheels

When Should I Replace My Brakes 

when use brake is used for an extended period of time, it will eventually wear out.  You should undertake a brake inspection to determine precisely which braking parts need to be replaced.  However, the quality of the brakes, not mileage, determines how long they typically survive