A kind of short fiber reinforced oriented max phase ceramic matrix composite material and preparation method

A technology of short fiber reinforcement and composite materials, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science. It can solve the problems of high reaction synthesis temperature, low strength, and performance degradation, and reduce the sintering reaction. The effect of good adaptability to temperature and technology and low equipment requirements
CN109053206BActive Publication Date: 2021-07-23INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2021-07-23

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Abstract

The invention relates to the field of MAX-phase ceramic-based composite materials, in particular to a short-fiber-reinforced and oriented MAX-phase ceramic-based composite material and a preparation method thereof. A new process of preparing fiber-reinforced MAX phase ceramic matrix composites with fibers, nanosheet layered MAX phase ceramic powder, and other additives is used to prepare a matrix composed of highly oriented lamellar MAX phase ceramics, and the fibers are parallel to the axial direction. A new ternary composite material in which the layered MAX phase ceramics are distributed, and the granular ceramic phase reinforcement phase is dispersed in the matrix. Therefore, the MAX phase ceramic matrix composite material matrix material prepared by the existing method has coarse grains, many internal defects, low strength, and poor fracture toughness; and the reaction sintering temperature is too high, and the chemical and physical damage of the fiber in the substrate causes performance degradation etc. The fiber prepared by the method is suitable for large-scale industrial preparation, and its performance far exceeds any existing known fiber MAX phase composite material.
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Description

technical field

[0001] The invention relates to the field of MAX-phase ceramic-based composite materials, in particular to a short-fiber-reinforced and oriented MAX-phase ceramic-based composite material and a preparation method thereof. Background technique

[0002] MAX phase material (such as: Ti 3 SiC 2 、Ti 2 AlC, Nb 2 AlC, etc.) as a ceramic material room temperature fracture toughness up to 6 ~ 8MPa.m 1 / 2 At the same time, it has the characteristics of high structural strength, oxidation resistance, thermal corrosion resistance, radiation resistance, damage self-healing, etc., and the maximum service temperature of some types reaches 1700 °C. However, its strength and hardness are much lower than that of Al 2 o 3 , TZP, YAG and other traditional ceramics, room temperature brittleness and reliability are lower than traditional metal materials. In order to improve its strength, hardness, and toughness, the second phase particles (such as: SiC, Al 2 o 3 、Ti 5 Si ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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