Carbon ceramic brake disc with stable friction coefficient and preparation method thereof: Fid-Bau Portal

Carbon ceramic brake disc with stable friction coefficient and preparation method thereof

WANG FUYUAN / ZHENG WEI / WANG JING / DONG QIANG / SHI SITAO

The invention discloses a friction coefficient stable carbon ceramic brake disc and a preparation method thereof, and relates to the technical field of brake material preparation. Comprising the following steps: adding resin, an organic solvent and a curing agent into filler, and uniformly mixing to prepare slurry; impregnating the carbon fiber preform with the slurry, and then curing and cracking to prepare a carbon/carbon blank with a filler; and machining to obtain a carbon/carbon brake disc, then carrying out ceramic treatment by adopting a reactive infiltration method, and then carrying out finish machining to obtain the ceramic brake disc with the stable friction coefficient. The PIP (dipping-cracking) process and filler addition can slow down the volume shrinkage of a matrix, improve the carbon yield, increase the density, reduce the abrasion of the carbon-ceramic brake disc in the braking process, obtain a large-area continuous friction film, improve the braking stability of the brake disc and obtain a friction coefficient with high stability; the problems that in the braking process of a carbon ceramic brake disc, the friction coefficient shakes, braking is unstable, and the abrasion loss is large are solved.

本发明公开了一种摩擦系数稳定碳陶刹车盘及其制备方法，涉及刹车材料制备技术领域。包括以下步骤：在填料中加入树脂、有机溶剂和固化剂，混合均匀，制得浆料；将碳纤维预制体采用浆料进行浸渍，然后固化、裂解，制得带有填料的碳/碳坯体；机械加工，得到碳/碳刹车盘，然后采用反应熔渗法进行陶瓷化处理，再进行精加工，制得摩擦系数稳定陶瓷刹车盘。本发明中PIP(浸渍‑裂解)工艺、添加填料，能够减缓基体体积收缩，提高产碳率，增加密度，减小碳陶刹车盘在制动过程中的磨损，获得大面积连续的摩擦膜，提高刹车盘的制动稳定性，获得稳定性高的摩擦系数，解决了碳陶刹车盘在制动过程中摩擦系数抖动、制动不平稳、磨损量大的问题。

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