Preparation method of C/Al-Si-X ablation-resisting composite material

A composite material and anti-ablation technology, which is applied in the field of preparation of high-temperature ablation-resistant composite materials, can solve the problems of interface reaction C/C matrix damage, high melting temperature, etc., to overcome C/C matrix damage, interface reaction, and price cheap effect

Active Publication Date: 2017-07-21
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical difficulty of high smelting temperature when refractory metal is used for modification in the preparation process of heat-resistant materials, and overcome the technical problems of interfacial reaction and C / C matrix damage, and provide a C / Al -Preparation method of Si-X anti-ablation composite material

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  • Preparation method of C/Al-Si-X ablation-resisting composite material
  • Preparation method of C/Al-Si-X ablation-resisting composite material
  • Preparation method of C/Al-Si-X ablation-resisting composite material

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specific Embodiment approach 1

[0020] Specific embodiment 1: In this embodiment, a method for preparing a C / Al-Si-X anti-ablation composite material is specifically carried out according to the following steps:

[0021] 1. Weigh 50-90 parts of carbon material matrix, 5-30 parts of metal X precursor and 10-45 parts of impregnating agent according to parts by mass;

[0022] 2. At room temperature, immerse the carbon material weighed in step 1 in a saturated aqueous solution of the metal X precursor, and keep it in a vacuum environment for 0.5 to 1 hour to obtain a carbon material-X precursor complex;

[0023] 3. Under the atmospheric environment, heat and crack the carbon material-X precursor complex obtained in step 2, control the cracking temperature to 120-240° C., and the cracking time to 0.5-2 hours, to obtain the carbon material-oxidized X complex;

[0024] 4. Put the carbon material-oxidized X complex obtained in step 3 into a tube furnace, and carry out reduction in a hydrogen atmosphere. ~3h;

[00...

specific Embodiment approach 2

[0028] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the carbon material described in step 1 is: the density is 1.78g / cm 3 High-density graphite or a density of 1.70g / cm 3 C / C composite materials. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the metal X precursor described in step one is one or more of ammonium molybdate, sodium molybdate, ammonium tungstate and sodium niobate A mixture in any ratio. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a C/Al-Si-X ablation-resisting composite material. The invention relates to the technical field of preparation of high-temperature ablation-resisting composite material. The invention solves the technical difficulty of too high melting temperature when a heatproof material is modified by a refractory metal during the preparation process, and overcomes the technical problem of interface reaction and C/C matrix damage. The method includes steps of firstly, weighing a raw material; secondly, preparing a carbon material-X precursor composite body; thirdly, splitting; fourthly, reducing; fifthly, preparing a prefabricating body; sixthly, processing impregnant; seventhly, applying pressure, and filling the impregnant in a prefabricating body hole. The preparation method is short in technical cycle and low in matrix price; the preparation method overcomes the shortcomings of interface reaction and C/C matrix damage caused by too high melting temperature of the refractory metal. The invention is used for preparing the ablation-resisting composite material.

Description

technical field [0001] The invention relates to the technical field of preparation of high-temperature ablation-resistant composite materials. Background technique [0002] Ablation-resistant materials are a class of materials used in the aerospace field for high temperature resistance and high-speed airflow erosion resistance for missile nose cones, rocket engine gas rudders, throat linings, pinpins and other structures. From the perspective of historical development, there are refractory metal materials, ceramic composite materials, C / C composite materials and graphite materials. Due to the high density of refractory metals and the high brittleness of ceramic matrix composites, C / C composites have gradually developed into the main ablation-resistant materials today. C / C composite material is a new type of lightweight and high-strength material composed of carbon fiber and pyrolytic carbon, which has high high-temperature mechanical properties and vacuum properties. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B41/90
CPCC04B35/83C04B41/009C04B41/52C04B41/90C04B41/5133C04B41/5155
Inventor 武高辉康鹏超曲桉彤乔菁张强杨文澍
Owner HARBIN INST OF TECH
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