Composite oxide coating and its preparation method and application

A composite oxide and coating technology, which is applied in textiles, papermaking, fiber treatment, etc., can solve the problems of easy cracks and peeling of coatings, achieve the effects of not easy to fall off, easy to obtain, and improve high temperature oxidation resistance

Active Publication Date: 2021-02-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to provide a composite oxide coating, which has the advantage of not only preserving the internal structure of the coated material, enhancing the mechanical properties of the coated material, but also solving the problem that the coating is prone to appear. Cracks, easy peeling and other problems, improve the high temperature oxidation resistance of the coated material, and broaden the scope of use of materials

Method used

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  • Composite oxide coating and its preparation method and application
  • Composite oxide coating and its preparation method and application
  • Composite oxide coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of solution A: slowly add 0.7 g of lanthanum acetate powder into 8 g of deionized water, and then magnetically stir at room temperature for 30 minutes to completely dissolve the lanthanum acetate, and the solution becomes clear and transparent to obtain solution A. Preparation of solution B: slowly add 8 g of glacial acetic acid and 0.7 g of zirconium n-butoxide into 8 g of ethanol successively, and magnetically stir for 30 min at room temperature to fully mix the solution evenly to obtain solution B. Under the condition of magnetic stirring, slowly add the A solution to the B solution at a rate of 2ml / min until the A solution is added dropwise, and continue stirring for 10 minutes at room temperature to fully hydrolyze the zirconium-butoxide to obtain a stable and transparent zirconium-lanthanum composite oxide biosol.

[0038] Soak the silicon carbide fiber in the above-mentioned zirconium-lanthanum composite oxide sol and ultrasonically vibrate for 20 min...

Embodiment 2

[0041]Preparation of solution A: slowly add 0.5 g of lanthanum acetate powder into 8 g of water, stir magnetically at room temperature for 30 minutes after the addition, to completely dissolve the lanthanum acetate, and the solution becomes clear and transparent to obtain solution A. Preparation of solution B: slowly add 8 g of glacial acetic acid and 0.5 g of zirconium n-butoxide into 8 g of ethanol successively, and magnetically stir for 30 min at room temperature to fully mix the solution evenly to obtain solution B. Under the condition of magnetic stirring, slowly add solution A to solution B at a rate of 1ml / min until solution A is added dropwise, and continue to stir for 10 minutes at room temperature to fully hydrolyze zirconium-butoxide to obtain a stable and transparent zirconium-lanthanum composite oxide sol.

[0042] Soak the silicon carbide fiber in the above-mentioned zirconium-lanthanum composite oxide sol and ultrasonically vibrate for 20 minutes, then take it o...

Embodiment 3

[0044] Prepare four parts of A solution: take 4 parts of 8g deionized water each, slowly add 0.3g, 0.5g, 0.7g and 0.9g of lanthanum acetate powder into 8g of deionized water, and stir magnetically at room temperature for 30min after the addition is completed, so that Lanthanum acetate was completely dissolved, and the solution became clear and transparent.

[0045] Prepare four parts of solution B: take 4 parts of the mixed solution of 8g ethanol and 8g glacial acetic acid, add 0.3g, 0.5g, 0.7g, and 0.9g of zirconium n-butoxide into the mixed solution of 8g ethanol and 8g glacial acetic acid respectively, at room temperature Under magnetic stirring for 30min, the solution is fully mixed evenly; take the A and B solutions corresponding to lanthanum acetate and zirconium n-butoxide with the same quality, and slowly add the A solution to the B solution at a speed of 5ml / min under magnetic stirring conditions. Continue to stir for 10 min at room temperature until the addition of s...

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Abstract

The invention discloses a composite oxide coating, which comprises zirconia and lanthanum oxide. The preparation method of the composite oxide coating comprises: 1) dissolving lanthanum salt in water and stirring evenly to obtain solution A; 2) dissolving the zirconium oxide Mix the precursor, alcohol and acid, and stir evenly to obtain solution B; 3) Slowly add solution A to solution B while stirring to obtain the composite oxide coating precursor sol; 4) Place the carrier in the composite oxidation Compound oxide coatings with different thicknesses can be obtained by impregnating, drying, and heat-treating in the precursor sol of the coating. The preparation process of the present invention is simple, the raw materials of the coating are easy to obtain, and it is convenient for industrialization. After layering, it can maintain the interface stability of the composite material under high temperature and long-term working conditions, and improve the high temperature oxidation resistance and high temperature alkali corrosion resistance of the fiber.

Description

technical field [0001] The invention relates to interface layer materials, in particular to a composite oxide coating and its preparation method and application. Background technique [0002] Fiber-reinforced ceramic matrix composites have been widely used in the aerospace field due to their excellent properties such as corrosion resistance and high temperature resistance. In the preparation process of fiber-reinforced composite materials, the interfacial bonding between fiber and matrix is ​​a key factor affecting the performance of composite materials. In order to realize the optimal design of the interface, it is the most effective means to coat the appropriate coating on the surface of the fiber as the interface layer between the fiber and the matrix. The interface layer material itself must have high oxidation resistance; it can prevent the external matrix from reacting with the fiber; on the premise of improving the oxidation resistance of the material, it is necessar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/45D06M11/46
CPCD06M11/45D06M11/46
Inventor 刘玉付韦静新
Owner SOUTHEAST UNIV
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