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Zirconium carbide-silicon carbide composite powder material and preparation method thereof

A composite powder and silicon carbide technology, which is applied in the field of zirconium carbide-silicon carbide composite powder materials and its preparation, can solve the problems of restricting large-scale industrial application, complex raw material components, and long aging time, and achieve the goal of improving carbon heat. The effect of reduction reaction rate, wide range of raw material sources and low production cost

Active Publication Date: 2020-02-21
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material composition of this method is complex, the cost is high, and the aging time is long, and the process is difficult to control, which limits its large-scale industrial application.

Method used

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  • Zirconium carbide-silicon carbide composite powder material and preparation method thereof
  • Zirconium carbide-silicon carbide composite powder material and preparation method thereof
  • Zirconium carbide-silicon carbide composite powder material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Example 1 Preparation of zirconium carbide-silicon carbide composite powder material 1#

[0054] Zirconium oxychloride (ZrOCl 2 ·8H 2 O), tetraethyl orthosilicate (TEOS), and glucose were added to 100ml of deionized water respectively, stirred and dissolved to make them evenly mixed; wherein the molar ratio of Zr:Si element was 1:1; (Zr+Si):(C) element ratio It is 1:2.5; the total molar concentration of (Zr+Si) elements in the solution is 0.2mol / L. Put the above solution in a reactor and carry out hydrothermal reaction treatment, the reaction temperature is 220°C, and the reaction time is 24 hours; the hydrothermal product is washed with deionized water until the pH value is neutral, and vacuum dried at 80°C for 12 hours to obtain coordination polymerization A homogeneous hydrothermal precursor that is solidified and has a certain degree of carbonization of carbohydrates; the resulting precursor is calcined at 900°C in a nitrogen atmosphere for 2 hours to obtain a pyr...

Embodiment 2

[0055] Example 2 Preparation of zirconium carbide-silicon carbide composite powder material 2#

[0056] Zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 O), tetraethyl orthosilicate (TEOS), and sucrose were added to 100ml of deionized water, stirred and dissolved to make them evenly mixed; wherein, the molar ratio of Zr:Si element was 1:2; (Zr+Si):(C) element The ratio is 1:3.5; the total molar concentration of (Zr+Si) elements in the solution is 0.5mol / L. Put the above solution in a reactor, and carry out hydrothermal reaction treatment, the reaction temperature is 200°C, and the reaction time is 36 hours; the hydrothermal product is washed with deionized water until the pH value is neutral, and vacuum-dried at 100°C for 10 hours to obtain the complex A homogeneous hydrothermal precursor that is polymerized and solidified and has a certain degree of carbohydrate carbonization; the obtained precursor is calcined at 900°C in a nitrogen atmosphere for 2 hours to obtain a pyrolysis precur...

Embodiment 3

[0057] Example 3 Preparation of zirconium carbide-silicon carbide composite powder material 3#

[0058] Zirconium sulfate (Zr(SO 4 ) 2 4H 2 O), tetraethyl orthosilicate (TEOS), and soluble starch were respectively added to 100ml of deionized water, stirred and dissolved to make them evenly mixed, wherein the molar ratio of Zr:Si element was 2:1; (Zr+Si):(C) element The ratio is 1:4.5; the total molar concentration of (Zr+Si) elements in the solution is 0.8mol / L. Put the above solution in a reactor and carry out hydrothermal reaction treatment, the reaction temperature is 180°C, and the reaction time is 48 hours; the hydrothermal product is washed with deionized water until the pH value is neutral, and freeze-dried for 8 hours to obtain coordination polymerization solidification And a homogeneous hydrothermal precursor with a certain degree of carbonization of carbohydrates; the obtained precursor is calcined at 900 ° C in a nitrogen atmosphere for 2 hours to obtain a pyroly...

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Abstract

The application discloses a zirconium carbide-silicon carbide composite powder material, wherein a molar ratio of components in the zirconium carbide-silicon carbide composite powder material satisfies ZrC:SiC=1:0.1-1:10; a preparation process is easy, the cost is low, and the process is easy to control; and the obtained zirconium carbide-silicon carbide composite powder material has the advantages of submicron level, uniform composition and high purity.

Description

technical field [0001] The application relates to a zirconium carbide-silicon carbide composite powder material and a preparation method thereof, belonging to the field of inorganic non-metallic materials. Background technique [0002] Carbide ceramics are excellent structural ceramic materials. They can still maintain good mechanical properties under extreme conditions such as high temperature, corrosion, and radiation. They can be used in aerospace, nuclear reactors, cemented carbide processing, high-temperature structural parts, etc. . Single-phase carbide has low fracture toughness and poor high-temperature oxidation resistance, which greatly limits its application. In recent years, based on the characteristics of two-phase materials, it has become a research hotspot to realize the performance summation and complementarity of composite materials. Zirconium carbide-silicon carbide composite materials can combine the excellent high temperature resistance and radiation re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/571C04B35/626
CPCC04B35/5622C04B35/571C04B35/62605
Inventor 许文涛周有福王志光卢帅
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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