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Method for preparing corn-cob structure morph-genetic ceramic-based composite material

A ceramic composite material and composite material technology, which is applied in the field of preparation of corn cob structure remains ceramic matrix composite materials, can solve the problems such as inability to prepare remains ceramic composite materials, and achieve good bearing and sensory effects

Inactive Publication Date: 2013-11-06
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a corncob-structured state ceramic matrix composite material, which solves the problem that the existing preparation method cannot use corncobs as a biological template structure to prepare a state-of-the-art ceramic composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take corn cobs purchased from the market, and naturally impregnate SiO after hydrolysis with ethyl orthosilicate at room temperature. 2 The sol was dried for 7 days, after being naturally impregnated with phenolic resin, hot-pressed on a hot press for 1 hour at 120°C and 0.1MPa pressure, and cured after molding to obtain corncob / SiO 2 Composite template. The prepared corncob / SiO2 The composite template was placed in a vacuum hot-pressing furnace, under a vacuum protective atmosphere, at a heating rate of 5 °C / min, kept at 1300 °C for 1 h, and cooled with the furnace to prepare silicon carbide ceramic composite materials with corn cob remains. The prepared corn cob structure relic ceramics were repeatedly impregnated with the precursor SiO 2 After the sol, put it in a vacuum hot-press furnace, under the vacuum protection atmosphere, the vacuum degree is 1×10 -1 Pa, after vacuum carbothermal reduction reaction, high-purity silicon carbide ceramic composites with corn co...

Embodiment 2

[0040] Commercially available corncobs were taken, impregnated with epoxy resin under positive and negative pressure at room temperature, and cured at room temperature to obtain a corncob structure template. The prepared corn cob template was placed in a vacuum hot-press furnace, under a nitrogen protective atmosphere, at a heating rate of 3 °C / min, kept at 500 °C for 10 h, and cooled at a rate of 10 °C / min to prepare a corn cob template Structural relic carbon templates. The prepared corn cob structure remains carbon template in a vacuum of 1 × 10 -1 Pa, 1400 ℃ liquid phase siliconizing reaction, obtain high purity silicon carbide ceramics with corn cob structure

Embodiment 3

[0042] Commercially available corn cobs were ultrasonically impregnated with Al(OH) at 50°C 3 The sol was dried for 5 hours, after being naturally impregnated with phenolic resin, hot-pressed on a hot press for 1 hour at 120°C and 0.5 MPa pressure, and solidified after molding to obtain corncob / Al(OH) 3 Composite template. The prepared corncob / Al(OH) 3 The composite template was placed in a vacuum hot-pressing furnace, under a vacuum protective atmosphere, at a heating rate of 3°C / min, kept at 600°C for 10h, and cooled with the furnace to prepare corn cob Al 2 o 3 ceramic composites. The prepared corn cob ceramics were repeatedly impregnated with precursor Al(OH) by ultrasonic for 3 times. 3 After the sol, put it in a vacuum hot-press furnace, under the vacuum protection atmosphere, the vacuum degree is 1×10 -1 Pa, heat up to 600°C at 3°C / min, hold for 2h, and obtain high-purity Al with corn cob structure after vacuum carbothermal reduction reaction 2 o 3 ceramic compos...

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Abstract

The invention discloses a method for preparing a corn-cob structure morph-genetic ceramic-based composite material, which comprises the following steps of: preparing a corn-cob structure template or a corn-cob structure / precursor composite template; raising the temperature of the corn-cob structure template or the corn-cob structure / precursor composite template to the temperature of between 500 and 2,000 DEG C at the temperature rise speed of 3 to 20 DEG C per minute in the protective atmosphere of vacuum or inert gases; maintaining the temperature for 1 to 10 hours, and cooling to obtain a morph-genetic carbon template or morph-genetic ceramic composite material; after impregnating in the precursor solution or precursor sol, raising the temperature to the temperature of between 1,300 and 2,000 DEG C at the temperature rise speed of 3 to 20 DEG C per minute in the protective atmosphere of vacuum or inert gases; maintaining the temperature for 1 to 10 hours, and performing vacuum carbothermal reduction to obtain the corn-cob structure morph-genetic ceramic-based composite material; or performing liquid-phase siliconizing or gas-phase siliconizing on the morph-genetic carbon template in the protective atmosphere of vacuum or inert gases to obtain the corn-cob structure morph-genetic ceramic-based composite material. The composite material prepared by the invention has the advantages of light weight, shock absorption, sound absorption, high temperature resistance, antioxidation, antifriction and abrasive resistance, load bearing, excellent sensing property, and wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a preparation method of a composite material, in particular to a preparation method of a corn cob structure state ceramic matrix composite material. Background technique [0002] At present, the known technologies of oxide, carbide and nitride ceramic composite materials with relic structure include: 1) Materials Herald [J]. Research Progress"; 2) Advances in Chemistry [J], 2008, 20(6): 989-1000 "Preparation of Wood Ceramics by Biological Template Method"; 3) Ningxia Engineering Technology [J], 2006, 6: 130-134 Published "Preparation of TiN / C Porous Ceramics Using Wood as a Template"; 4) Master's Degree Thesis of Kunming University of Science and Technology, 2006, 19: 1-88 "Preparation and Characterization of Tobacco Rod-Based Wood Ceramics"; 5) Patent "Ecological Ceramics, Preparation method of metal composite material" (patent number ZL02137503.8, publication number...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622
Inventor 杨敏鸽王俊勃贺辛亥付翀申明乾姜凤阳王琼
Owner XI'AN POLYTECHNIC UNIVERSITY
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