Preparation method for carbon/carbon-graphite composite material used for pantograph slide plate of high-speed train
A technology for pantograph slides and high-speed trains, applied in the field of carbon/carbon-graphite composite material preparation, which can solve problems such as poor mechanical properties and weak electrical conductivity, and achieve the effects of small friction coefficient, good electrical conductivity, and high melting point
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specific Embodiment approach 1
[0013] Embodiment 1: This embodiment is a method for preparing a carbon / carbon-graphite composite material for a pantograph slide plate of a high-speed train, which is specifically completed according to the following steps:
[0014] 1. Configure graphite suspension: disperse graphite into the medium by ultrasonic dispersion method or ball milling method, and configure graphite suspension with a concentration of 80g / L-200g / L; 2. Prepare graphite preform: disperse graphite with a density of 0.1 g / cm 3 ~0.7g / cm 3 , carbon fiber felt preforms with a thickness of 0.1 cm to 10 cm are added to graphite suspensions with a concentration of 80 g / L to 200 g / L, and graphite preforms are obtained by ultrasonic impregnation or vacuum pressure impregnation, wherein the graphite preforms The content of graphite in the body is 1vol%~10vol%; 3. Impregnation-carbonization and densification of pitch: the impregnation-carbonization and densification of graphite prefabricated body obtained in ste...
specific Embodiment approach 2
[0019] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ultrasonic dispersion method described in Step 1 is specifically operated as follows: ultrasonically disperse graphite into the medium, and ultrasonically disperse for 0.5 h to 2 h. Other steps are the same as in the first embodiment.
specific Embodiment approach 3
[0020] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the specific operation of the ball milling method described in step one is as follows: the mass ratio of the ball material is (10~30):1. Disperse into the medium by ball milling, and the ball milling time is 0.5h~2h. Other steps are the same as those in Embodiment 1 or 2.
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