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Preparation method of Z-pins-like metal rod enhanced carbon ceramic composite material

A technology of carbon-ceramic composite materials and metal rods, which is applied in the field of preparation of Z-pins-like metal rod-reinforced carbon-ceramic composite materials, can solve the problems of reducing the density of oxide protective films on the surface of substrates, and achieve high-temperature thermal resistance to chemical burning. Corrosion and mechanical erosion properties, low cost, and the effect of avoiding oxidation

Active Publication Date: 2018-12-11
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the extremely harsh environment where the composite modified C / C composite material of ultra-high temperature ceramics and SiC ceramics is used at a temperature exceeding 2000 ° C, SiO 2 A large amount of evaporation is inevitable, which will eventually reduce the density of the oxide protective film on the surface of the substrate

Method used

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  • Preparation method of Z-pins-like metal rod enhanced carbon ceramic composite material
  • Preparation method of Z-pins-like metal rod enhanced carbon ceramic composite material
  • Preparation method of Z-pins-like metal rod enhanced carbon ceramic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 1) Drill holes on the C / C-ZrC-SiC composite cylinder with a thickness of 10mm and a diameter of φ30mm; the punching equipment adopts a vertical machining center (JASU V-850); the hole diameter is 1.8mm, and the hole depth is 6mm, and the number of holes is 29, and the distribution density is 10%.

[0061] 2) Pretreat the V powder; select the powder with a particle size of 73 μm and a purity greater than 99.9% (Beijing Xingrongyuan Technology Co., Ltd.); and add 2% liquid paraffin to the selected powder as a forming agent (Sinopharm Chemical Reagent Co., Ltd.), pour absolute ethanol as the ball milling medium, use a planetary ball mill to wet-grind the metal powder and liquid paraffin under the protection of argon for 12 hours until uniform, and then dry it in a vacuum oven for 12 hours before use;

[0062] 3) Manually filling the prepared metal powder into the blind hole of the substrate and compacting it;

[0063] 4) Putting the pressed sample into a vacuum sintering ...

Embodiment 2

[0076] 1) Drill holes on the C / C-ZrC-SiC composite material cylinder with a thickness of 10mm and a diameter of φ30mm; the punching equipment adopts a vertical machining center (JASU V-850); the hole diameter is 1.8, and the hole depth is 4mm , and the number of holes is 29, and the distribution density is 10%.

[0077] 2) Pretreat the Zr-Al16 alloy powder; the particle size of the selected alloy powder is 73 μm and the purity is greater than 99.9% (Beijing Xingrongyuan Technology Co., Ltd.); and the selected powder is added with 2% liquid paraffin as a forming agent (Sinopharm Group Chemical Reagent Co., Ltd.), pour absolute ethanol as a ball milling medium, use a planetary ball mill to wet-grind metal powder and liquid paraffin under argon protection for 12h to uniformity, and then dry it in a vacuum oven for 12h before use;

[0078] 3) filling the prepared metal powder into the blind hole of the substrate, and pressing to form;

[0079] 4) Putting the pressed sample into a...

Embodiment 3

[0092] 1) Drill a C / C-ZrC-SiC composite cylinder with a thickness of 10mm and a diameter of φ30mm; the drilling equipment adopts a vertical machining center (JASU V-850); the diameter of the hole is 1.8, and the depth of the hole is 4mm , and the number of holes is 29, and the distribution density is 10%.

[0093] 2) Pretreat the Mo-Si-Ti mixed powder; the particle size of the selected molybdenum, silicon, and titanium powders is 200 mesh and the purity is greater than 99.9% (Beijing Xingrongyuan Technology Co., Ltd.); and the selected powders are placed on the planet The three kinds of metal powders were wet-milled for 12 hours under the type ball mill, and its ball-milling medium was absolute ethanol; then it was standby after drying in a vacuum oven for 12 hours; finally, 2% liquid paraffin was added as a forming agent (Sinopharm Group Chemical Reagent Co., Ltd.), Then pour absolute ethanol as the ball milling medium, and use a planetary ball mill to wet-grind the Mo-Si-Ti ...

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Abstract

The invention discloses a preparation method of a Z-pins-like metal rod enhanced carbon ceramic composite material. According to the method, pretreated metal powder is filled into longitudinal blind holes of a carbon-ceramic composite material; pressing and shaping are performed; sintering is performed in vacuum or inert atmosphere; the Z-pins-like metal rod enhanced carbon ceramic composite material is obtained. By using the technical scheme, the blind hole is prefabricated in a thickness direction of a shaped carbon-carbon prefabricated body or a carbon-carbon prefabricated body; then, the Z-pins-like metal rod enhanced carbon ceramic composite material is obtained through sintering after the metal or alloy powder filing in the blind hole; on one hand, the metal in the formed Z-pins-likestructure is oxidized superior to the ceramic base body in high-temperature environment; a good self healing effect of cracks, holes and the like can be reached; the high-temperature service time ofthe test samples is prolonged; the high-temperature service performance is improved; on the other hand, a great amount of energy is consumed through the mechanical linkage and pulling of the Z-pins-like structure, so that the interlayer cracking resistance performance of the base body is improved; the mechanical performance of the carbon-ceramic composite material is improved.

Description

technical field [0001] The invention relates to a method for preparing a Z-pins-like metal rod-reinforced carbon-ceramic composite material, which belongs to the technical field of composite material preparation. Background technique [0002] With the rapid development of aerospace technology, hypersonic vehicles have become the focus of aerospace research at this stage. However, due to its extremely fast flight speed as high as Mach number 5 or more, and the strong aerodynamic heating and high-speed particle erosion on the surface, the surface temperature of some parts is as high as 2000 °C or more. Then the requirements for the temperature resistance limit of the material, high temperature oxidation resistance and strength and toughness under high-speed air flow will be more stringent. Furthermore, very few components maintain structural and dimensional integrity in such a harsh oxidizing convective environment. Therefore, designing and preparing thermal protection mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/83C04B35/80C04B35/565C04B35/56C04B35/622C04B35/64
CPCC04B35/806C04B35/5622C04B35/565C04B35/622C04B35/64C04B35/66C04B35/83C04B2235/40C04B2235/404C04B2235/656C04B2235/6567
Inventor 孙威田甜熊翔王雅雷曾毅徐永龙
Owner CENT SOUTH UNIV
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