Patent ID: 11927231
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Materials, metallurgy (Chemistry)
Classification: CPC F  C | IPC C  F

Claim 15:
16. A brake rotor having a composite structure, the brake rotor comprising:
an annular body defining opposite first and second friction surfaces, the annular body comprising:
a core made of an Al—Si alloy and including a pair of first and second annular discs spaced apart from each other in an axial direction by a plurality of ribs, each of the first and second annular discs having an annular surface,
first and second thermal barrier layers made of a thermally insulating material and respectively disposed on the annular surfaces of the first and second annular discs of the core, and
first and second wear-resistant layers made of an Fe—Al—Si—Zr alloy and respectively disposed on the annular surfaces of the first and second annular discs over the first and second thermal barrier layers, the first and second wear-resistant layers respectively define the opposite first and second friction surfaces of the annular body.