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C/zrc composite material based on liquid phase melt impregnation and its preparation method

A composite material and melt impregnation technology, which is applied in the field of preparation of ultra-high temperature thermal protection structural materials, can solve the problems of reducing the preparation cycle of composite materials, expensive precursors, and difficult preservation of precursors, etc., so as to shorten the preparation cycle and improve densification. Efficiency, the effect of improving the introduction efficiency

Active Publication Date: 2017-12-26
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

By adding a SiC precursor (polycarbosilane) with a high ceramic yield (56%) to the ZrC precursor solution, the total ceramic yield of the precursor can be increased and the preparation cycle of the composite material can be reduced, as shown by Dong Shaoming (J. Am.Ceram. Soc., 95 [4] (2012) 1216-1219) and Xigongda Li Kezhi (CARBON 57 (2013) 161–168) prepared C / ZrC-SiC composites by 12 cycles of impregnation-cracking, but there are still costs High and precursors are not easy to preserve and other issues
[0006] Therefore, in view of the problems in the prior art that the precursors are expensive, difficult to preserve, low ceramic yield, low impregnation efficiency, and long preparation cycle, it is urgent to develop a kind of low-cost and easy-to-obtain raw material, high densification efficiency, and short preparation cycle. Preparation method of short and low-cost carbon fiber reinforced zirconium carbide composites

Method used

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  • C/zrc composite material based on liquid phase melt impregnation and its preparation method
  • C/zrc composite material based on liquid phase melt impregnation and its preparation method
  • C/zrc composite material based on liquid phase melt impregnation and its preparation method

Examples

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Effect test

Embodiment 1

[0043] A C / ZrC composite material based on liquid phase melt impregnation of the present invention, the C / ZrC composite material uses three-dimensional punctured carbon fiber cloth as a reinforcement, uses zirconium carbide as a matrix, and zirconium carbide is impregnated on a carbon fiber preform through liquid phase melt impregnation . In the C / ZrC composite material, the volume fraction of three-dimensional punctured carbon fiber cloth is 40%, and the volume fraction of zirconium carbide is 33%. The density of the C / ZrC composite is 2.23g / cm 3 , The porosity is 9%.

[0044] A kind of preparation method of the C / ZrC composite material of above-mentioned present embodiment, comprises the following steps:

[0045] (1) Precursor preparation: Add zirconium acetylacetonate powder into a three-necked flask, feed nitrogen, heat to 200°C, and react with mechanical stirring for 0.5 hours. The white powder of zirconium acetylacetonate is melted into a brown liquid, and the brown li...

Embodiment 2

[0060] A C / ZrC composite material based on liquid phase melt impregnation of the present invention, the C / ZrC composite material uses three-dimensional punctured carbon fiber cloth as a reinforcement, uses zirconium carbide as a matrix, and zirconium carbide is impregnated on a carbon fiber preform through liquid phase melt impregnation . In the C / ZrC composite material, the volume fraction of three-dimensional punctured carbon fiber cloth is 40%, and the volume fraction of zirconium carbide is 36.7%. The density of the C / ZrC composite is 2.40g / cm 3 , The porosity is 8%.

[0061] A kind of preparation method of the C / ZrC composite material of above-mentioned present embodiment, comprises the following steps:

[0062] (1) Precursor preparation: Add zirconium acetylacetonate powder into a three-necked flask, feed nitrogen, heat to 200°C, and react with mechanical stirring for 0.5 hours. The white powder of zirconium acetylacetonate is melted into a brown liquid, and the brown ...

Embodiment 3

[0072] A C / ZrC composite material based on liquid phase melt impregnation of the present invention, the C / ZrC composite material uses three-dimensional punctured carbon fiber cloth as a reinforcement, uses zirconium carbide as a matrix, and zirconium carbide is impregnated on a carbon fiber preform through liquid phase melt impregnation . In the C / ZrC composite material, the volume fraction of three-dimensional punctured carbon fiber cloth is 40%, and the volume fraction of zirconium carbide is 44.4%. The density of the C / ZrC composite is 2.45g / cm 3 , The porosity is 8%.

[0073] A kind of preparation method of the C / ZrC composite material of above-mentioned present embodiment, comprises the following steps:

[0074] (1) Precursor preparation: Add zirconium acetylacetonate powder into a three-necked flask, feed nitrogen, heat to 190°C, and react with mechanical stirring for 0.5 hours. The white powder of zirconium acetylacetonate melts into a brown liquid. Pour out the brown...

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Abstract

The invention discloses a liquid phase melt impregnation-based C / ZrC composite material and a preparation method thereof. The C / ZrC composite material is prepared through liquid phase melt impregnation of zirconium carbide on a carbon fiber fabricated part with the carbon fiber fabricated part as a reinforcement and zirconium carbide as a matrix. The preparation method of the C / ZrC composite material comprises the steps of melt impregnation, pressuring mineralization, cracking, densification, high temperature reaction and redensification. The preparation method has the advantages of cheap and easily available raw materials, high densification efficiency, short preparation cycle and low preparation cost, and the C / ZrC composite material prepared in the invention has the characteristics of high melting point and excellent ablation resistance, and is an important candidate material for ultrahigh temperature heat protection of ultrahigh acoustic velocity aircrafts.

Description

technical field [0001] The invention belongs to the technical field of preparation of ultra-high temperature thermal protection structural materials, and in particular relates to a C / ZrC composite material based on liquid phase melt impregnation and a preparation method thereof. Background technique [0002] Hypersonic vehicles represented by near-space vehicles and highly maneuverable long-range strategic missiles have become the main development direction of weapon systems and aerospace, and are the commanding heights of strategic technology seized by major military powers. With the increase of the speed of hypersonic vehicles, the working environment of materials is getting worse and worse, and the existing high-temperature structural materials cannot meet the requirements of use. Therefore, the demand for new ultra-high temperature resistant, anti-oxidation, and micro-ablation thermal protection materials is extremely urgent . [0003] Continuous carbon fiber reinforced...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/84C04B35/56C04B35/653
CPCC04B35/5622C04B35/653C04B35/806C04B2235/5248C04B2235/616C04B2235/77
Inventor 胡海峰陈思安李勇张玉娣马新吴金泰廖艳
Owner NAT UNIV OF DEFENSE TECH
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