Preparation method of carbon ceramic automobile brake disc
An automobile brake and carbon ceramic technology, applied in mechanical equipment, friction linings, gear shifting mechanisms, etc., can solve the problems of weak bonding ability, high braking coefficient, material strength damage, etc., to avoid uneven pore distribution and stable braking. The effect of improving performance and service life
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Embodiment 1
[0045] The carbon-ceramic automobile brake disk that will be prepared in the embodiment of the present invention 1, its green body used is that density is 0.93g / cm 3 C / C composite materials.
[0046] step one:
[0047] Prepare the impregnating solution I according to the mass ratio of polymethylsilane: styrene = 100:35, put the C / C body into a metal impregnation tank, vacuum impregnate for 1 hour, and pressurize for 5 hours. After the impregnation is completed, the impregnating solution I is released, and the impregnated green body is put into a graphite tooling and put into a cracking furnace at 900°C for cracking. The whole process is protected by an inert atmosphere, and the above impregnation-cracking process is repeated twice.
[0048] During vacuum impregnation, the vacuum degree is controlled to be ≤10Pa, and the pressurized impregnation pressure is 5MPa.
[0049] Step two:
[0050] The pre-finished product prepared in step 1 is subjected to high-temperature treatme...
Embodiment 2
[0066] The carbon-ceramic automobile brake disk that will be prepared in the embodiment of the present invention 1, its green body used is that density is 0.80g / cm 3 C / C composite materials.
[0067] step one:
[0068] According to the mass ratio of polymethylsilane: styrene = 100:40, configure the impregnating solution I, put the C / C green body into the metal impregnating tank, adopt vacuum impregnation for 1h, control the vacuum degree ≤ 10Pa, pressurize the impregnation for 4h, and control the pressure After the impregnation is completed, the impregnation solution is released, and the impregnated green body is put into a graphite tooling and put into a cracking furnace at 900°C for cracking. The whole process is protected by an inert atmosphere, and the above impregnation-cracking process is repeated 3 times.
[0069] Step two:
[0070] The pre-finished product prepared in step 1 is subjected to high-temperature treatment at 1500°C in a vacuum environment with a vacuum d...
Embodiment 3
[0086] The carbon-ceramic automobile brake disk that will be prepared in the embodiment of the present invention 3, its green body used is that density is 1.02g / cm 3 C / C composite materials.
[0087] step one:
[0088] The impregnating solution is prepared according to the mass ratio of polymethylsilane: styrene = 100:30, and the C / C green body is placed in a metal impregnating tank, vacuum impregnated for 2 hours, and pressure impregnated for 6 hours. After the impregnation is completed, the impregnation liquid is released, and the impregnated green body is put into a graphite tooling and put into a cracking furnace at 900°C for cracking. The whole process is protected by an inert atmosphere, and the above impregnation-cracking process is repeated twice.
[0089] During vacuum impregnation, the vacuum degree is controlled to be ≤10Pa, and the pressurized impregnation pressure is 6MPa.
[0090] Step two:
[0091] The pre-finished product prepared in step 1 is subjected to ...
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