C/ZrC composite material prepared on basis of vapor infiltration reaction, preparation method thereof and equipment for process

A composite material and process technology, which is applied in the field of preparation of ultra-high temperature thermal protection structures, can solve the problem that the product structure uniformity and performance consistency cannot be guaranteed, it is difficult to control the reaction time, the degree of internal penetration of the reaction volume, and the impact on the high temperature of the composite material. Stability and mechanical properties and other issues, to achieve the effect of increasing effective evaporation, excellent performance and low cost

CN103342561BActive Publication Date: 2014-11-05NAT UNIV OF DEFENSE TECH
1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-11-05

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a C / ZrC composite material prepared on the basis of vapor infiltration reaction. The C / ZrC composite material adopts zirconium carbide as a matrix and adopts a carbon fiber prefabricated body as an enhanced phase. For the C / ZrC composite material, the density is 1.98-4.25g / cm<3>, the aperture ratio is 6%-18% and the content of metal zirconium is below 0.5wt%. A preparation method comprises the following steps of: in preparation, firstly forming a fiber prefabricated body, then preparing a fiber protective coating and a porous C / C prefabricated body, carrying out high-temperature treatment on the prepared porous C / C prefabricated body in the inert atmosphere, finally putting the metal zirconium at the bottom of a graphite crucible, putting the C / C prefabricated body above the metal zirconium, heating under the vacuum condition, enabling zirconium steam to be volatilized and carry out vapor impregnation reaction with the C / C prefabricated body so as to obtain a product. Self-made vapor impregnation equipment is adopted in preparation. The invention has the advantages that the period is short, the cost is low, the high-temperature resistance of a product is good, the mechanical property is excellent, the residual amount of metal is minimum and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of preparation of an ultra-high temperature thermal protection structure, and in particular relates to a preparation method of a C / ZrC ultra-high temperature ceramic matrix composite material. Background technique

[0002] Hypersonic vehicles have become the main development direction of new hypersonic weapon systems and aerospace, and will play an important role in future national security and development. With the increase of the flight speed of hypersonic vehicles, the demand for ultra-high temperature resistant and ablation-resistant materials is becoming more and more urgent. The existing materials can no longer meet the needs of the development of thermal protection systems and propulsion systems of hypersonic vehicles. It is necessary to develop a new generation of resistant materials. Ultra-high temperature, anti-ablation, anti-thermal shock, high reliability new material.

[0003] Ultra-high temper...

Examples

Embodiment 1

[0037] A C / ZrC composite material prepared based on vapor phase infiltration reaction of the present invention, the C / ZrC composite material is based on zirconium carbide, and carbon fiber prefabricated body is used as a reinforcing phase, and the reinforcing phase in this embodiment has a volume fraction of about 15% three-dimensional needle felt, the density of the C / ZrC composite is 4.12g / cm 3 , the porosity is 15%, and the content of metal zirconium in the C / ZrC composite material is 0.1wt%. The measurement method of the residual metal Zr is: cut the C / ZrC composite material into 3mm×3mm×5mm blocks, and weigh them after ultrasonic cleaning and drying with ethanol. 1 , soaked in 10% acid solution (HCl:HF=3:1) for 12h, then took out distilled water and ultrasonically cleaned several times, dried and weighed m 2 , the residual metal Zr content is obtained as (m 1 -m 2 ) / m 1 .

[0038] The preparation method of the above-mentioned C / ZrC composite material of the present e...

Embodiment 2

[0046] a kind of like figure 2 , image 3 The C / ZrC composite material prepared based on the vapor phase infiltration reaction of the present invention is shown. The C / ZrC composite material uses zirconium carbide as the matrix and carbon fiber prefabricated body as the reinforcing phase. The reinforcing phase in this embodiment has a volume fraction of about 15% three-dimensional needle felt, the density of the C / ZrC composite is 3.07g / cm 3 , the porosity is 13%, and the content of metal zirconium in the C / ZrC composite material is 0.5wt%.

[0047] The preparation method of the above-mentioned C / ZrC composite material of the present embodiment specifically comprises the following steps:

[0048] (1) Forming of fiber prefabricated body: the continuous fiber cloth and short fibers are arranged and three-dimensionally needled to obtain a carbon fiber prefabricated body; the volume fraction of the carbon fiber prefabricated body is 15%;

[0049] (2) Preparation of fiber prote...

Embodiment 3

[0056] A C / ZrC composite material prepared based on gas phase infiltration reaction of the present invention, the C / ZrC composite material is based on zirconium carbide, and carbon fiber prefabricated body is used as a reinforcing phase. The reinforcing phase in this embodiment has a volume fraction of about 45% three-dimensional punctured fiber cloth, the density of the C / ZrC composite is 2.75g / cm 3 , the porosity is 8%, and the content of metal zirconium in the C / ZrC composite material is 0.2wt%.

[0057] The preparation method of the above-mentioned C / ZrC composite material of the present embodiment specifically comprises the following steps:

[0058] (1) Forming of fiber prefabricated body: the carbon cloth is laminated and punctured in the Z direction to obtain a carbon fiber prefabricated body; the volume fraction of the carbon fiber prefabricated body is 45%;

[0059] (2) Preparation of fiber protective coating: A cracked carbon coating was deposited on the fiber surfa...