A kind of ablation-resistant carbon/carbon-zirconium carbide-copper composite material and preparation method thereof

A composite material, zirconium carbide technology, applied in metal material coating process, gaseous chemical plating, coating and other directions, can solve the problems of easy agglomeration of additives, difficult preparation, crusting, etc., to improve ablation resistance, The effect of improving overall performance and simple preparation process

Inactive Publication Date: 2017-02-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among these methods, the hot pressing method has great damage to the fiber and is easy to destroy the toughening effect; in the slurry / micro-powder impregnation method, it is difficult to ensure the uniformity of the slurry, and the additives are easy to agglomerate in the matrix; the CVI method has a long preparation cycle, high cost, and is easy. Incrustation on the surface of the preform; Relatively speaking, RMI has the advantages of short preparation cycle, low cost, and near-net shape, and is one of the effective methods for preparing composite materials. It has been widely used in the preparation of silicon carbide and carbide with complex structures Zirconium and hafnium carbide based composite parts
However, infiltrating molten metal liquid, especially zirconium liquid, into the porous carbon body, due to the high infiltration temperature of zirconium (above 1850°C), it is difficult to prepare, which is not conducive to industrial production and application.
[0007] As for carbon / carbon-copper composites, the poor performance of the resulting material is due to the poor wettability between copper and carbon materials
[0008] In conclusion, so far there has been no relevant literature report on the preparation of carbon / carbon-zirconium carbide-copper composite materials and their use by using elemental powders

Method used

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  • A kind of ablation-resistant carbon/carbon-zirconium carbide-copper composite material and preparation method thereof
  • A kind of ablation-resistant carbon/carbon-zirconium carbide-copper composite material and preparation method thereof
  • A kind of ablation-resistant carbon/carbon-zirconium carbide-copper composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Use polyacrylonitrile-based carbon fiber needle-punched integral felt as a prefabricated body (density 0.4g / cm 3 ), in high purity N 2 Carrier gas, C 3 h 6 A carbon / carbon composite green body with a porosity of about 50% (density of 1.0 g / cm 3 );

[0049] (2) prepare zirconium-copper mixed powder, wherein the mass percentage of zirconium powder is 50%;

[0050] (3) Embedding the carbon / carbon composite body of step (1) in the mixed powder of step (2), under the vacuum condition of 1200 ℃ (vacuum degree is less than or equal to 10 -2 atm) under infiltration treatment 4h, after the reaction, carbon / carbon-zirconium carbide-copper composite material is obtained; its composition mass ratio is, carbon / carbon composite green body: zirconium carbide: copper and / or copper-zirconium alloy=32.28:23.1: 44.62.

[0051] (4) The carbon / carbon-zirconium carbide-copper composite material is processed into a Φ30*10mm cylinder, and the oxygen-acetylene ablation experiment is c...

Embodiment 2

[0055] (1) Use polyacrylonitrile-based carbon fiber needle-punched integral felt as a prefabricated body (density 0.4g / cm 3 ), in high purity N 2 Carrier gas, C 3 h 6 A carbon / carbon composite green body with a porosity of about 40% (density of 1.2 g / cm 3 );

[0056] (2) prepare zirconium-copper mixed powder, wherein the mass percentage of zirconium powder is 60%;

[0057] (3) Embedding the carbon / carbon composite green body of step (1) in the mixed powder of step (2), under the vacuum condition of 1350 ℃ (vacuum degree is less than or equal to 10 -2 atm) under infiltration treatment for 3h, after the reaction, carbon / carbon-zirconium carbide-copper composite material is obtained; its composition mass ratio is, carbon / carbon composite green body: zirconium carbide: copper and / or copper-zirconium alloy=28.38:43.2: 28.42.

[0058] (4) The carbon / carbon-zirconium carbide-copper composite material is processed into a Φ30*10mm cylinder, and the oxygen-acetylene ablation exper...

Embodiment 3

[0062] (1) Use polyacrylonitrile-based carbon fiber needle-punched integral felt as a prefabricated body (density 0.5g / cm 3 ), in high purity N 2 Diluent gas, C 3 h 6 A carbon / carbon composite green body with a porosity of about 30% (density of 1.4 g / cm 3 );

[0063] (2) prepare zirconium-copper mixed powder, wherein the mass percentage of zirconium powder is 70%;

[0064] (3) Embedding the carbon / carbon composite body of step (1) in the mixed powder of step (2), under the vacuum condition of 1500 ℃ (vacuum degree is less than or equal to 10 -2 atm) under infiltration treatment 2h, after the reaction, carbon / carbon-zirconium carbide-copper composite material is obtained; its composition mass ratio is, carbon / carbon composite green body: zirconium carbide: copper and / or copper-zirconium alloy=44.74:40.5: 14.76.

[0065] (4) The carbon / carbon-zirconium carbide-copper composite material is processed into a Φ30*10mm cylinder, and the oxygen-acetylene ablation experiment is c...

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Abstract

The invention discloses a preparation method of an ablation-resistant carbon / carbon-zirconium carbide-copper composite material. The preparation method comprises preparing a porous carbon / carbon composite blank from polyacrylonitrile-based carbon fiber needled integral felt as a preform by a chemical vapor infiltration densification and high-temperature heat treatment technology, and carrying out reactive melt infiltration on zirconium-copper mixed powder into the carbon / carbon composite blank so that the ablation-resistant carbon / carbon-zirconium carbide-copper composite material is prepared. Performance indexes of the ablation-resistant carbon / carbon-zirconium carbide-copper composite material are determined. The preparation method utilizes the zirconium-copper mixed powder and prepares the ablation-resistant carbon / carbon-zirconium carbide-copper composite material with low porosity, uniform phase composition, good hardness and bending strength and excellent ablation performances at a low melt infiltration temperature.

Description

technical field [0001] The invention relates to an ablation-resistant carbon / carbon-zirconium carbide-copper composite material and a preparation method thereof, belonging to the technical field of preparation of ablation-resistant composite materials. Background technique [0002] With the development of aerospace technology, the performance requirements of ablation-resistant materials are getting higher and higher. The most typical ablation-resistant part is the throat liner of the ramjet engine. The throat liner is located in the throat of the ramjet engine and is the core of the rocket and missile nozzle materials. If the throat liner is severely ablated during work, it will directly affect the thrust and efficiency of the engine. , It is difficult to maintain a stable aerodynamic shape and even cause the throat liner to break, causing the engine to lose its ability to work. Therefore, the throat liner has become a key issue in the development of rocket technology. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C23C16/26B22D23/04
Inventor 冉丽萍吴皇周文艳庞伟林杨凌云张仲灵葛毅成彭可易茂中
Owner CENT SOUTH UNIV
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