Nitride ceramic fiber reinforced inorganic non-metal composite material and preparation method thereof

A technology of nitride ceramics and inorganic non-metals, which is applied in the field of ceramic matrix composite materials and its preparation, can solve the problems of high dielectric constant and dielectric loss, unsatisfactory oxidation resistance and strength, etc., and achieve low dielectric constant, Effects of low dielectric loss and wide application prospects

Inactive Publication Date: 2011-09-07
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing fiber-reinforced ceramic matrix composites have high dielectr

Method used

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  • Nitride ceramic fiber reinforced inorganic non-metal composite material and preparation method thereof
  • Nitride ceramic fiber reinforced inorganic non-metal composite material and preparation method thereof
  • Nitride ceramic fiber reinforced inorganic non-metal composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] In the nitride ceramic fiber reinforced inorganic non-metal composite material of this embodiment, the matrix is ​​boron nitride ceramic, and the reinforcing phase is silicon nitride ceramic fiber.

[0027] Preparation:

[0028] (1) Preparation of nitride ceramic fiber braid

[0029] Using a 2.5D weaving structure, the silicon nitride ceramic fiber is woven into a three-dimensional fabric on the mold, and the fiber volume fraction is 40%;

[0030] (2.) Pretreatment of nitride ceramic fiber braid

[0031] Place the nitride ceramic fiber braid prepared in step (1) in a high-temperature furnace, heat it up to 500°C in a vacuum environment, keep it for 60 minutes, and lower it to room temperature, then take it out for use;

[0032] (3) Precursor impregnation, thermal crosslinking and curing, cracking of matrix material

[0033] Place the nitride ceramic fiber braid pretreated in step (2) in a vacuum impregnation tank. After vacuuming, the braid is immersed in the prec...

Example Embodiment

[0039] Example 2:

[0040] In the nitride ceramic fiber reinforced inorganic non-metal composite material of this embodiment, the matrix is ​​silicon nitride ceramic, and the reinforcing phase is boron nitride ceramic fiber.

[0041] Preparation:

[0042] (1) Same as step (1) of embodiment 1, except that the ceramic fiber is boron nitride ceramic fiber;

[0043] (2) Place the boron nitride ceramic fiber braid prepared in step (1) in a high-temperature furnace, raise the temperature to 600°C in a vacuum environment, keep it for 60 minutes, and lower it to room temperature, then take it out for later use;

[0044] (3) Precursor impregnation, thermal crosslinking and curing, cracking of matrix material

[0045] Place the nitride ceramic fiber braid treated in step (2) in a vacuum impregnation tank, and after evacuating to 60 Pa, immerse the braid in perhydropolysilazane for 120 minutes; then pressurize it in a closed container to 6MPa, heat to 120°C, keep for 40 hours to crosslink and soli...

Example Embodiment

[0051] Example 3

[0052] The nitride ceramic fiber reinforced inorganic non-metal composite material of this embodiment has a quartz ceramic matrix and a ceramic fiber containing silicon-nitrogen-boron as the reinforcing phase (ie, silicon-nitrogen-boron ceramic fiber).

[0053] Preparation:

[0054] (1) Same as step 1 in Example 1; except that the ceramic fiber is silicon nitride boron ceramic fiber

[0055] (2) Place the boron nitride ceramic fiber braid prepared in step (1) in a high-temperature furnace, raise the temperature to 550°C in a vacuum environment, keep it for 120 minutes, and lower to room temperature, then take it out for later use;

[0056] (3) Precursor impregnation, thermal crosslinking and curing, cracking of matrix material

[0057] Place the silicon nitride boron ceramic fiber braid treated in step (2) in a vacuum impregnation tank, suck the matrix material precursor silica sol into the braid after vacuuming, and then heat it to 80°C in an open container. Heat pre...

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Abstract

The invention relates to a nitride ceramic fiber reinforced inorganic non-metal composite material and a preparation method thereof. The nitride ceramic fiber reinforced inorganic non-metal composite material matrix is ceramic of one or more of silicon carbide, silicon nitride, boron nitride, boron carbide, aluminum oxide, aluminum nitride, zirconium oxide, aluminium phosphate and zirconium phosphate, wherein the reinforced phase is nitride ceramic fiber. The preparation method comprises the following steps of: (1) preparing the nitride ceramic fiber into three-dimensional braided fabric, overlapped cloth or felt; (2) pretreating the braided fabric, overlapped cloth or felt before soaking; (3) soaking a matrix material precursor polymer or sol into the pretreated braided fabric, overlapped cloth or felt of the nitride ceramic fiber, heating and curing, and cracking at a high temperature to convert into ceramic. The composite material has low dielectric constant and dielectric loss, high oxidation resistance, high strength, high temperature resistance and high toughness, serves as a material with high temperature resistance and excellent bearing capacity, wave permeability and corrosion resistance, and has wide application.

Description

technical field [0001] The invention relates to a ceramic matrix composite material and a preparation method thereof, in particular to a nitride ceramic fiber reinforced inorganic non-metallic composite material and a preparation method thereof. Background technique [0002] Fiber-reinforced ceramic composite materials refer to composite materials that use ceramic or inorganic fibers as the reinforcing phase and inorganic non-metallic materials as the matrix. The fibers include carbon fibers, silicon carbide fibers, alumina fibers, quartz fibers, mullite fibers, silicon nitride fibers, boron nitride fibers, silicon-nitrogen-boron fibers, etc., and the matrix materials include silicon carbide, silicon nitride, Silicon oxide, boron nitride, boron carbide, alumina, aluminum nitride, zirconia, aluminum phosphate, zirconium phosphate, etc. [0003] Fiber-reinforced ceramic matrix composites have the advantages of high temperature resistance, high strength, high toughness, easy m...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/84
Inventor 曹峰张长瑞王思青李斌方震宇李端
Owner NAT UNIV OF DEFENSE TECH
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