Carbon-core silicon carbide fibre-reinforced boride ultrahigh-temperature ceramic matrix composite and preparation method thereof

A technology of silicon carbide fiber and ultra-high temperature ceramics, which is applied in the field of boride ultra-high temperature ceramic matrix composite materials and its preparation, can solve problems such as poor toughness, achieve the effects of delaying crack growth, simple process steps, and easy operation

Active Publication Date: 2012-09-19
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor toughness of existing boride ultra-high temperature ceramic matrix composite materials, and provide a

Method used

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  • Carbon-core silicon carbide fibre-reinforced boride ultrahigh-temperature ceramic matrix composite and preparation method thereof
  • Carbon-core silicon carbide fibre-reinforced boride ultrahigh-temperature ceramic matrix composite and preparation method thereof
  • Carbon-core silicon carbide fibre-reinforced boride ultrahigh-temperature ceramic matrix composite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] According to the volume fraction of the composite material, 90% zirconium boride powder (99% purity, 10 μm particle size) was mixed evenly with absolute ethanol as the mixing medium. Wherein, the mass ratio of powder and solvent is 1:2. Then, the mixed slurry and the ceramic fiber (100 μm in diameter) with a volume fraction of 10% are stacked and stacked. The thickness of the upper and lower layers of slurry is 5 mm, and the thickness of the middle slurry is 2 mm. 1mm, stacked in a graphite mold. The fibers are arranged in one direction. Next, put the mixture of fibers and particles together with the mold into a vacuum oven and dry at 60°C. Afterwards, the dried mixture is cold-pressed and compacted together with the mold on a flatbed press. The cold pressing pressure is 20MPa, and the time is 1h. Finally, the cold-pressed and compacted mixture block together with the graphite mold is placed in a hot-pressed sintering furnace, and under the protection of argon, the ...

Embodiment 2

[0031] Mix 80% zirconium boride powder (purity 99%, particle size 5 μm) and 10% silicon carbide powder (purity 99%, particle size 2 μm) according to the total volume of the composite material, and mix them with absolute ethanol Medium, mix well. Wherein, the mass ratio of powder and solvent is 1:3. Then, the mixed slurry and the volume fraction of 10% ceramic fibers (130 μm in diameter) are laminated, the thickness of the upper and lower layers of slurry is 4 mm, the thickness of the middle slurry is 2 mm, and the distance between the fibers of the same layer is 1 mm. Stacking in graphite moulds. The fibers are arranged in one direction. Next, put the mixture of fibers and particles together with the mold into a vacuum oven and dry at 60°C. Afterwards, the dried mixture is cold-pressed and compacted together with the mold on a flatbed press. The cold pressing pressure is 20MPa, and the time is 1h. Finally, the cold-pressed and compacted mixture block together with the gra...

Embodiment 3

[0033]Mix 70% zirconium boride powder (purity 99%, particle size 4 μm) and 10% silicon carbide powder (purity 99%, particle size 1 μm) according to the total volume of the composite material, and mix them with absolute ethanol Medium, mix well. Wherein, the mass ratio of powder and solvent is 1:3. Then, the mixed slurry and the volume fraction of 20% ceramic fibers (150 μm in diameter) are laminated, the thickness of the upper and lower layers of slurry is 4mm, the thickness of the slurry in the middle is 1mm, and the distance between the fibers of the same layer is 0.5mm. Stacked in graphite moulds. The fibers of different layers are arranged vertically and crosswise. Next, put the mixture of fibers and particles together with the mold into a vacuum oven and dry at 60°C. Afterwards, the dried mixture is cold-pressed and compacted together with the mold on a flatbed press. The cold pressing pressure is 20MPa, and the time is 1h. Finally, the cold-pressed and compacted mix...

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Abstract

The invention discloses a carbon-core silicon carbide fibre-reinforced boride ultrahigh-temperature ceramic matrix composite, characterized by being produced from, in volume fraction, 60-90% of boride powder, 0-30% of silicon carbide particles and 10-40% of carbon-core silicon carbide fibres. The carbon-core silicon carbide fibre-reinforced boride ultrahigh-temperature ceramic matrix composite disclosed by the invention has the advantages of being simple in process and excellent in performance.

Description

technical field [0001] The invention belongs to a boride ultra-high temperature ceramic matrix composite material and a preparation method thereof, in particular to a carbon core silicon carbide fiber toughened zirconium boride or hafnium boride ultrahigh temperature ceramic matrix composite material and a preparation method thereof. Background technique [0002] Ultra-high-temperature ceramic (UHTC) materials have high-temperature strength and high-temperature oxidation resistance, and can adapt to extreme environments such as supersonic long-duration flight, atmospheric re-entry, trans-atmospheric flight, and rocket propulsion systems, and can be used in aircraft nose cones and leading edges of wings , engine hot end and other key parts or components. Transition metal compounds, such as zirconium diboride, hafnium diboride, tantalum diboride, titanium diboride, titanium carbide, tantalum carbide, zirconium carbide and hafnium carbide, have high melting points and excellent...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/58C04B35/622
Inventor 郭全贵刘占军肖客松
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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