Densification tool mold and densification method for ceramic matrix composite matrix

Abstract

The invention discloses a densification tool mold and densification method for ceramic matrix composite matrix, and the densification tool mold comprises a sealing end cover, a shape-preserving frame and a material storage base which are sequentially connected in a sealed mode; a flat-plate-shaped fiber prefabricated body is arranged between the shape-preserving frame and the sealing end cover, and a filling port and an air inlet are formed in the upper surface of the sealing end cover; the filling port is used for being communicated with a slurry feeding pipe, and the air inlet is used for being connected with an air pump. The upper surface of the sealing end cover is provided with an exhaust port and a connecting port used for connecting a pressure gauge and a safety valve, and the exhaust port is used for being connected with a vacuum pump. The flat-plate-shaped fiber prefabricated body is clamped through the shape-preserving frame, the size stability of the prefabricated body can be maintained, material deformation caused by external pressurization in the densification process can be effectively avoided, closed holes formed in the material in the impregnation process are effectively reduced, the repeated densification frequency can be reduced through pressurization of the air pump; therefore, the densification efficiency of the material is improved, and near-net forming of the ceramic-based composite material is realized.

Description

technical field [0001] The invention relates to the technical field of preparation of ceramic matrix composite materials, in particular to a densification tooling mold and a densification method of a ceramic matrix composite material matrix. Background technique [0002] As the working temperature of aero-engine turbines continues to increase, the environmental protection requirements for engines are becoming more and more stringent. The latest aero-engines in the United States have adopted ceramic matrix composites as high-temperature structural materials for the latest generation of engines. Therefore, there is an urgent need to develop applications in aviation in China. Research on the preparation of ceramic matrix composites in the field of engines. [0003] Because ceramic matrix composites have the similarity of traditional composite material preparation methods, and because the actual material is prepared by slurry impregnation method in the preparation process, there...

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Problems solved by technology

[0003] Because ceramic matrix composites have the similarity of traditional composite material preparation methods, and because the actual material is prepared by slurry impregnation method in the preparation process, there are too many closed cells inside the material during the densification process and densification by the traditional preparation process. The number of times is complicated, and the prefabricated body is still lacking in density during the densification process, so problems such as deformation and fiber breakage are prone to occur during the densification process.

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