Cf/ZrB2-SiC ultrahigh-temperature ceramic matrix composite material of laminated structure and preparing method thereof

A technology of ultra-high temperature ceramics and layered structure, which is applied in the field of layered structure Cf/ZrB2-SiC ultra-high temperature ceramic matrix composite material and its preparation, can solve the problems of long preparation period, difficult to obtain, fiber/interface damage, etc. The effects of improving ablation resistance and oxidation resistance, simple and easy preparation process, and controllable matrix composition

Inactive Publication Date: 2019-09-06
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the CVI and PIP methods have a long preparation cycle, and it is difficult to obtain high density and high ultra-high temperature ceramic phase content; while the reactive infiltration method often has problems such as fiber / interface damage and large-scale metal residues, which affect the performance of composite materials.

Method used

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  • Cf/ZrB2-SiC ultrahigh-temperature ceramic matrix composite material of laminated structure and preparing method thereof
  • Cf/ZrB2-SiC ultrahigh-temperature ceramic matrix composite material of laminated structure and preparing method thereof
  • Cf/ZrB2-SiC ultrahigh-temperature ceramic matrix composite material of laminated structure and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Fiber reinforcement interface deposition: select two-dimensional carbon fiber woven cloth (thickness 100 μm ~ 1mm) as the reinforcement, and use chemical vapor deposition method to deposit a PyC / SiC composite interface with a thickness of 100 nm on the surface of the fiber;

[0041] Slurry preparation: use absolute ethanol as solution, 15wt% (accounting for powder mass) polyvinylpyrrolidone as dispersant and binder, add ZrB pre-mixed by ball milling 2 - 20vol% SiC powder with a solid content of 60wt%. Ball milling for 24 hours to obtain a slurry for impregnation with good dispersibility and fluidity;

[0042] Impregnation: place the fiber reinforcement at the deposition interface in the slurry, and impregnate it for 30 minutes under the condition of vacuum degree -0.08MPa. After impregnating the obtained fiber cloth and drying it at 60°C, a carbon fiber preform is obtained;

[0043] Preparation of cast green body: cast the above slurry into a film, dry at room tempera...

Embodiment 2

[0047] Similar to the steps in Example 1, the difference is that the fiber surface deposition thickness is 100nm P y C interface. The resulting layered structure C f / ZrB 2 - The content of carbon fiber in SiC ultra-high temperature ceramic matrix composite material is ~30vol%, the porosity is ~3.5%, ZrB 2 Content is ~55vol%, air plasma ablation 3MW / m 2 After 2 minutes of ablation, the line ablation rate was only ~1.8μm / s.

Embodiment 3

[0049] Similar to the steps in Example 1, the difference is that the dispersant is 5wt% polyvinyl chloride, and the binder is 10wt% polyvinyl butyral. The resulting layered structure C f / ZrB 2 - The content of carbon fiber in SiC ultra-high temperature ceramic matrix composite material is ~30vol%, the porosity is ~3.5%, ZrB 2 Content is ~55vol%, air plasma ablation 3MW / m 2 After 2 minutes of ablation, the line ablation rate was only ~1.8μm / s.

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Abstract

The invention relates to a Cf / ZrB2-SiC ultrahigh-temperature ceramic matrix composite material of a laminated structure and a preparing method thereof. The preparing method comprises the steps of 1, adding ZrB2 powder, SiC powder, a dispersing agent and a binder into a solvent, and mixing the materials to obtain ZrB2-SiC slurry; 2, adopting a casting forming method for preparing the ZrB2-SiC slurry into ZrB2-SiC biscuits; 3, impregnating a carbon fiber fabric body with the ZrB2-SiC slurry to obtain carbon fiber preforms; 4, alternatively laminating the obtained ZrB2-SiC biscuits and the carbonfiber preforms at least once, and then conducting glue discharge and sintering to obtain the Cf / ZrB2-SiC ultrahigh-temperature ceramic matrix composite material of the laminated structure.

Description

technical field [0001] The present invention relates to a layered structure C f / ZrB 2 -SiC ultra-high temperature ceramic matrix composite material and preparation method thereof, belonging to the technical field of ultra-high temperature ceramic matrix composite material preparation. Background technique [0002] As one of the major key technologies, high-temperature structural materials with the characteristics of ultra-high temperature resistance, anti-oxidation ablation, and high strength play a pivotal role in the development of hypersonic vehicles. The ultra-high temperature ceramic matrix composite material prepared by using continuous fiber as reinforcement and ultra-high temperature ceramics as matrix has well solved the shortcomings of ceramic materials such as low fracture toughness, small fracture strain, and poor thermal shock resistance, and has outstanding ultra-high temperature resistance. Excellent performance and high temperature oxidation and ablation r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/58C04B35/622
CPCC04B35/806C04B35/58078C04B35/622C04B2235/3826C04B2235/5248C04B2235/5436C04B2235/5445C04B2235/616C04B2235/6562C04B2235/6567C04B2235/658C04B2235/6581C04B2235/96C04B2235/9607
Inventor 倪德伟陈博文董绍明靳喜海周海军高乐
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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