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Ablation-resistant ternary dissipation agent and application

A technology of dissipating agent and ablation resistance, which is used in ablation-resistant dissipating agents and application fields, can solve the problems of low dissipative agent content and high linear ablation rate, achieve good heat dissipation, improve infiltration rate, Good protective effect of the matrix

Active Publication Date: 2018-08-17
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of low dissipative agent content in the existing dissipative and heat-resistant composite material matrix and high linear ablation rate due to low dissipative agent content, the present invention proposes an ablation-resistant ternary dissipative agent and its application

Method used

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  • Ablation-resistant ternary dissipation agent and application
  • Ablation-resistant ternary dissipation agent and application

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specific Embodiment approach 1

[0026] Embodiment 1: The ablation-resistant ternary dissipative agent in this embodiment includes 4-8 parts by mass of aluminum powder, 11-14 parts of silicon powder and 1-3 parts of boron powder.

[0027] The principles and beneficial effects of this embodiment are:

[0028] 1. The ablation-resistant ternary dissipative agent in this embodiment has a higher melting point than the aluminum-silicon binary dissipative agent, and can adapt to higher temperature ablation environments; the addition of boron can improve the The wettability of the powder and the substrate improves the infiltration rate, and forms a liquid ceramic protective layer with greater adhesion on the surface of the substrate in an ablation environment, which resists air erosion and better protects the substrate; and boron has a high melting latent heat and latent heat of vaporization, which can play a good role in heat dissipation; the physical properties of the alloy components of the ablation-resistant tern...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that: the particle diameter of the aluminum powder is <3 mm; the particle diameter of the silicon powder is <3 mm; and the particle diameter of the boron powder is <3 mm. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0032] Specific Embodiment Three: The application of the ablation-resistant ternary dissipative agent in the preparation of dissipative and heat-resistant composite materials in this embodiment.

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Abstract

The invention belongs to the field of lightweight ablation-resistant dissipation heat-proof composite materials, particularly relates to an ablation-resistant dissipation agent and application and aims to solve problems of high linear ablation rate and low dissipation agent content in a matrix of a dissipation heat-proof composite material. A dissipation agent alloy system comprises aluminum, silicon and boron, and the ternary dissipation agent is applied to the dissipation heat-proof composite material. An application method includes: firstly, dissipation agent preparation; secondly, base material treatment; thirdly, graphite crucible treatment; fourthly, vacuum gas pressure infiltration. The novel ternary dissipation agent is provided on the basis of a dissipation heatproof mechanism, aliquid ceramic protective layer for heat dissipation and oxygen dissipation can be formed under conditions of high temperature, high pressure and high-speed particle flow erosion, and the prepared lightweight ablation-resistant dissipation heat-proof composite material is used for manufacturing of throat inserts of solid rocket engine nozzles, gas rudders, end caps, wing leading edges and tail vanes of hypersonic aircrafts and steering porous plate components of missiles.

Description

technical field [0001] The invention belongs to the field of lightweight ablation-resistant, dissipation-resistant and heat-resistant composite materials, and in particular relates to an ablation-resistant dissipation agent and its application. Background technique [0002] Ablation-resistant materials are important engineering materials in the fields of national defense and aerospace. Their function is to maintain the aerodynamic shape of the heated parts during working hours under the conditions of high temperature and high-speed airflow to make the aircraft work normally. With the continuous development of aerospace technology, more and more stringent requirements are put forward for ablation-resistant materials. Traditional ablation-resistant materials mainly include refractory metals and their composite materials, ceramic matrix composite materials, resin matrix composite materials, tungsten copper infiltration and carbon / carbon composite materials, etc. The ablation r...

Claims

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Application Information

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IPC IPC(8): C04B41/88
CPCC04B41/009C04B41/5155C04B41/88C04B35/83C04B35/522C04B41/4525C04B41/5096C04B41/5094
Inventor 康鹏超武高辉孙家琪邓恒李卫鹏严欧鹏乔菁芶华松
Owner HARBIN INST OF TECH
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