Copper-free graphene ceramic brake pad composite material, brake pad, its preparation method and application
A composite material and graphene technology, applied in friction linings, other chemical processes, chemical instruments and methods, etc., to achieve excellent wear resistance, high safety and reliability, and stable friction coefficient changes
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[0028] Another aspect of the embodiments of the present invention also provides a method for preparing a copper-free graphene ceramic brake pad, which includes:
[0029] According to the aforementioned copper-free graphene ceramic brake pad composite material, the components are uniformly mixed to obtain mixed raw materials;
[0030] The mixed raw materials are subjected to molding treatment, heat treatment and curing treatment to obtain copper-free graphene ceramic brake pads.
[0031] As one of the preferred embodiments, the preparation method specifically includes:
[0032] The graphene, aramid, artificial graphite and potassium titanate are pre-mixed, and then uniformly mixed with the remaining components of the aforementioned copper-free graphene ceramic brake pad composite material (for example, continuous mixing for 1-15 minutes) to obtain mixed raw materials ;
[0033] The mixed raw materials are placed in a molding cavity for forming treatment, and then subjected to heat treat...
Embodiment 1
[0046] The copper-free graphene ceramic brake pad composite material of this embodiment contains the following components by weight percentage:
[0047] Resin 8%, Nitrile Rubber 2%, Graphene 2%, Artificial Graphite 7%, Coke 11%, Molybdenum Disulfide 2%, Corundum 2%, Aramid 1%, Calcium Sulfate Whiskers 8%, Mineral Fiber 10% , Potassium titanate 15%, barium sulfate 14%, vermiculite 8%, calcium silicate 5%, iron oxide black 4%, zinc powder 3%.
[0048] Pre-mix graphene, aramid, artificial graphite, and barium sulfate according to the above ratio, and put each material into the rake mixer for 10 minutes; weigh the mixture, pour it into the molding cavity, and press The unit pressure is 25Mpa, the mold cavity temperature is 140°C, the number of exhausts is 3 times and the pressure holding time is 5 minutes. The brake pads are kept at 160°C for 4 hours, heated to 180°C for 6 hours, and heated to 220°C for 4 hours. Carry out post-curing treatment, then cool to room temperature in the fur...
Embodiment 2
[0051] The copper-free graphene ceramic brake pad composite material of this embodiment contains the following components by weight percentage:
[0052] Resin 7%, Nitrile rubber 1%, Graphene 1.5%, Artificial graphite 8%, Coke 11%, Molybdenum disulfide 3%, Corundum 1%, Aramid 4%, Calcium sulfate whisker 9%, Mineral fiber 9% , Potassium titanate 16%, barium sulfate 13.5%, vermiculite 6%, calcium silicate 5%, iron oxide black 4%, zinc powder 1%.
[0053] Pre-mix graphene, aramid, artificial graphite, and barium sulfate according to the above ratio, and put each material into the rake mixer for 1 minute; weigh the mixture, pour it into the molding cavity, and press The unit pressure is 50Mpa, the mold cavity temperature is 200°C, the number of exhausts is 3 times and the pressure holding time is 5 minutes. The brake pads are kept at 160°C for 8 hours, heated to 150°C for 10 hours, and heated to 200°C for 6 hours. Carry out post-curing treatment, then cool to room temperature in the fu...
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