Novel high-strength oxide ceramic-based composite material and preparation method thereof

A technology of oxide ceramics and composite materials, which is applied in the field of preparation of new high-strength oxide ceramic matrix composite materials, to achieve the effect of uniform matrix, excellent mechanical properties and improved mechanical properties

Inactive Publication Date: 2022-01-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is still a gap in the production of high-performance oxide fibers in my country compared with developed countries in Europe and the United States.

Method used

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  • Novel high-strength oxide ceramic-based composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] (1) Using a three-dimensional five-way weaving process, the alumina fiber is woven into a fiber prefabricated body, and the size of the prefabricated body is 60×60×5 mm 3 flat fiber preform;

[0022] (2) Place the fiber preform in step (1) in a tube furnace, and calcinate for 30 minutes in an air environment at 800°C;

[0023] (3) Treat the precursor solution of lanthanum phosphate in a cold water bath at 1° C. for 15 minutes, and mix the prepared lanthanum phosphate precursor solution at 1° C. according to the ratio of atomic ratio lanthanum: phosphorus = 1:1 Configured as a lanthanum phosphate mixed solution with a mass concentration of 80g / L; the precursor solution for preparing lanthanum phosphate is a combination of phosphoric acid aqueous solution and lanthanum citrate aqueous solution;

[0024] (4) At room temperature, immerse the fiber preform calcined in step (2) into the lanthanum phosphate mixed solution prepared in step (3) for 20 minutes, take out the fibe...

Embodiment 2

[0031] (1) Using the three-dimensional four-way weaving process, the alumina fiber is woven into a fiber prefabricated body, and the size of the prefabricated body is 120×120×10mm 3 flat fiber preform;

[0032] (2) Place the fiber preform in step (1) in a tube furnace, and calcinate for 60 minutes in an air environment at 600°C;

[0033] (3) Treat the precursor solution of lanthanum phosphate in a cold water bath at 3° C. for 15 minutes, and mix the prepared lanthanum phosphate precursor solution at 3° C. according to the ratio of atomic ratio lanthanum: phosphorus = 1:1 Configured as a lanthanum phosphate mixed solution with a mass concentration of 100g / L; the precursor solution for preparing lanthanum phosphate is a combination of phytic acid aqueous solution and lanthanum nitrate aqueous solution;

[0034] (4) At room temperature, immerse the fiber preform calcined in step (2) into the lanthanum phosphate mixed solution prepared in step (3) for 30 minutes, take out the fib...

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Abstract

The invention belongs to the field of oxide ceramic-based composite materials, and particularly provides a novel high-strength oxide ceramic-based composite material and a preparation method thereof. The novel high-strength oxide ceramic-based composite material is prepared from a Mullite-Al2O3 matrix, an alumina fiber preform and a LaPO4 interface phase positioned between the matrix and the fiber preform. The preparation method comprises the following steps: weaving alumina fibers into a preform, preparing a LaPO4 interface by a sol-gel method, and preparing a Mullite-Al2O3 matrix by a chemical vapor infiltration method to obtain the composite material. The invention provides an oxide ceramic matrix composite material, which has a proper weak bonding interface with enough damage tolerance between fiber and a matrix and can be used for preparing a high-density matrix at a low temperature, so that the fracture work and fracture strain of the composite material can be improved while the fiber damage is reduced, and the requirements of the aerospace field on high-performance materials can be met.

Description

technical field [0001] The invention belongs to the field of oxide ceramic matrix composite materials, and in particular relates to a preparation method of a novel high-strength oxide ceramic matrix composite material. Background technique [0002] Known as the "Flower of Industry", aero-engines largely reflect the strength of a country's technology, industry and national defense. From a blank space when New China was founded, my country's aero-engines have undergone imitation, improvement, and remodeling, and now they can independently design and manufacture aero-engines, and have gone through a development path full of thorns. However, compared with developed countries in Europe and the United States, there is still a big gap in terms of engine manufacturing level and market share. High-performance aero-engine is one of the problems that need to be solved urgently, which poses a huge threat to my country's national strategic security. [0003] As the heart of an aircraft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/10C04B35/14
CPCC04B35/10C04B35/14C04B2235/3227C04B2235/3418C04B2235/656C04B2235/6567C04B2235/658C04B2235/6581
Inventor 杨丽霞钟伯锋张俊雄陈照峰廖家豪寇宗德
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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