Wear resistant braking systems
In some implementations of the current subject matter, a brake rotor can include a supporting layer applied to a friction surface of a brake rotor substrate, which can optionally include cast iron, and a coating applied over the supporting layer. The supporting layer can include a preparatory metal, and the coating can impart wear and corrosion resistant properties to the friction surface. Related systems, methods, articles of manufacture, and the like are disclosed.
1. A method comprising:
transferring an amount of a friction material from a brake pad to a friction surface of a brake rotor having persistent surface roughness features, the transferring creating a transfer film layer on the friction surface, the brake rotor comprising a supporting layer applied to the friction surface after formation of an activated layer on the friction surface, the formation of the activated layer resulting from a process comprising back-sputtering of the friction surface, the supporting layer configured to receive one or more coating materials;
retaining the transfer film layer on the friction surface at least in part due to the persistent surface roughness features; and
stopping a vehicle, the stopping comprising actuating a braking system comprising the brake pad and the brake rotor, the actuating causing the friction material of the brake pad to be urged into contact with the transfer film layer on the friction surface of the brake rotor such that an adherent friction interaction between the friction material and the transfer film layer enhances a braking power of the braking system.
2. The method of claim 1 , wherein the brake rotor further comprises:
a brake rotor substrate comprising the friction surface and a substrate material;
a coating applied over the supporting layer, the coating imparting wear and corrosion resistant properties to the friction surface, the coating comprising the one or more coating materials,
wherein the supporting layer comprises a preparatory metal.
3. The method of claim 2 , wherein the substrate material and the one or more coating materials do not comprise the preparatory metal.
4. The method of claim 3 , wherein the preparatory metal comprises nickel.
5. The method of claim 2 , wherein the preparatory metal comprises chrome.
6. The method of claim 1 , wherein the back-sputtering of the friction surface results from a process comprising accelerating ions of a preparatory metal of the supporting layer at the friction surface under a voltage in a range of approximately 400 V to 1200 V.
7. The method of claim 1 , wherein the one or more coating materials comprises graphene.
8. The method of claim 1 , wherein the brake rotor further comprises a coating, the coating comprising a first layer comprising a first material of the one or more coating materials and a second layer comprising a second material of the one or more coating materials.
9. The method of claim 8 , wherein the first material comprises a metal.
10. The method of claim 9 , wherein the metal comprises at least one of titanium, chromium, zirconium, aluminum, and hafnium.
11. A braking system for a vehicle, the braking system comprising:
a brake pad comprising a friction material; and
a brake rotor comprising:
a friction surface having persistent surface roughness features;
a supporting layer applied to the friction surface after formation of an activated layer on the friction surface, the formation of the activated layer resulting from a process comprising back-sputtering of the friction surface, the supporting layer configured to receive one or more coating materials; and
a transfer film layer located on the friction surface of the brake rotor, the transfer film layer formed from a transfer of an amount of the friction material from the brake pad to the friction surface of the brake rotor, and the transfer film layer retained on the friction surface at least in part due to the persistent surface roughness features,
wherein actuation of the braking system to slow or stop the vehicle is configured to cause the friction material of the brake pad to be urged into contact with the transfer film layer on the friction surface of the brake rotor such that an adherent friction interaction between the friction material and the transfer film layer enhances a braking power of the braking system.
12. The braking system of claim 11 , wherein the brake rotor further comprises:
a brake rotor substrate comprising the friction surface and a substrate material; and
a coating applied over the supporting layer, the coating imparting wear and corrosion resistant properties to the friction surface, the coating comprising the one or more coating materials,
wherein the supporting layer comprises a preparatory metal.
13. The braking system of claim 12 , wherein the substrate material and the one or more coating materials do not comprise the preparatory metal.
14. The braking system of claim 13 , wherein the preparatory metal comprises nickel.
15. The braking system of claim 12 , wherein the preparatory metal comprises chrome.
16. The braking system of claim 11 , wherein the back-sputtering of the friction surface results from a process comprising accelerating ions of a preparatory metal of the supporting layer at the friction surface under a voltage in a range of approximately 400 V to 1200 V.
17. The braking system of claim 11 , wherein the one or more coating materials comprises graphene.
18. The braking system of claim 11 , wherein the brake rotor further comprises a coating, the coating comprising a first layer comprising a first material of the one or more coating materials and a second layer comprising a second material of the one or more coating materials.
19. The braking system of claim 18 , wherein the first material comprises at least one of titanium, chromium, zirconium, aluminum, and hafnium.