Vacuum pressurization impregnation apparatus for preparing ceramic matrix composite material through PIP method

Abstract

The invention discloses a vacuum pressurization impregnation apparatus for preparing a ceramic matrix composite material through a PIP method. The vacuum pressurization impregnation apparatus is characterized by comprising an impregnation device 60, a water bath heating device 70, a pressurizing device 10, a vacuuming device 20 and a power control device 90, wherein the pressurizing device, the vacuuming device and the impregnation device are connected by stainless steel pipes; the water bath heating device wraps the periphery of the impregnation device and can be used for heating the impregnation device, the pressurizing device is a pressurizing pump, the vacuuming device is a vacuum pump, and the power control device sequentially controls the impregnation device, the water bath heating device, the pressurizing device and the vacuuming device through a power line. The vacuum pressurization impregnation apparatus has the beneficial effects that (1) the vacuum, pressurizing and water bath heating impregnation methods are combined to effectively improve the efficiency of impregnating a fiber prefabricated member in a precursor in the process of preparing the ceramic matrix compositematerial by PIP; (2) the operation is simple and the device structure is easy to realize; (3) through water bath heating, a precursor solution can be heated uniformly, stably and gently, thereby improving the impregnation efficiency and quality of the precursor solution.

Description

technical field [0001] A vacuum pressure impregnation equipment for PIP method ceramic matrix composite materials. Background technique [0002] The PIP method is an emerging method for preparing fiber-reinforced ceramic matrix composites. Its process steps are generally to use organic precursors to impregnate fiber preforms, cross-link and solidify, and then under a certain temperature and inert gas protection. High temperature pyrolysis is carried out to transform the precursor into an inorganic ceramic matrix, and a dense ceramic matrix composite material is finally obtained after multiple dipping and pyrolysis cycles. At present, through the molecular design of precursors, new ceramics such as silicon carbide, boron nitride, and aluminum nitride and their composite materials can be well prepared. Therefore, the PIP method will be an excellent method for preparing ceramic matrix composite materials. [0003] The characteristic of the PIP method is that the molecular desi...

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Problems solved by technology

This method combines vacuum and pressure impregnation, which can effectively and fully impregnate the precursor, but this method is too complicated to realize, and the heating method of this method is to heat the precursor solution through a heating furnace. Too vigorous and uneven to improve the impregnation efficiency of the precursor well

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