SiO2-mullite-Al2O3 multi-component gradient anti-oxidation coating and preparation method thereof

A multi-component, anti-oxidation technology, applied in coating, metal material coating process, superimposed layer plating, etc., can solve problems such as composition, uneven thickness, poor coating adhesion, easy peeling, etc., to achieve Reduced weight gain, improved antioxidant performance, and low cost effects

Pending Publication Date: 2022-04-26
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coatings prepared by these processes have problems such as but not limited to uneven composition and thickness, high cost, not suitable for large or complex parts, poor coating adhesion, and easy peeling.

Method used

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  • SiO2-mullite-Al2O3 multi-component gradient anti-oxidation coating and preparation method thereof
  • SiO2-mullite-Al2O3 multi-component gradient anti-oxidation coating and preparation method thereof
  • SiO2-mullite-Al2O3 multi-component gradient anti-oxidation coating and preparation method thereof

Examples

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preparation example Construction

[0034] The present invention relates to a SiO 2 -Mullite-Al 2 o 3 The multi-component gradient anti-oxidation coating and its preparation method are specifically implemented according to the following steps:

[0035] Step 1, the titanium alloy substrate is polished with 500#, 1000#, 1500#, 2000# sandpaper in sequence, and polished with abrasive paste;

[0036] Step 2, ultrasonically cleaning the titanium alloy substrate obtained in step 1 using absolute ethanol and deionized water in sequence, and the cleaning time is 10 to 20 minutes;

[0037] Step 3, drying the titanium alloy substrate obtained in step 2 in a blast drying oven, the drying temperature is 60-90° C., and the drying time is 60-80 minutes;

[0038] Step 4, place the substrate obtained in step 3 on the sample stage of the magnetron sputtering instrument, install the Si target on the target base, and coat the Si single substance layer on the surface of the titanium alloy by DC sputtering. The purity is 99.99%, an...

Embodiment example 1

[0044] Step 1, the titanium alloy substrate is polished with 500#, 1000#, 1500#, 2000# sandpaper in sequence, and polished with abrasive paste;

[0045] Step 2, ultrasonically cleaning the titanium alloy substrate obtained in step 1 using absolute ethanol and deionized water in sequence, and the cleaning time is 10 minutes;

[0046] Step 3, drying the titanium alloy substrate obtained in step 2 in a blast drying oven, the drying temperature is 60°C, and the drying time is 60 minutes;

[0047] Step 4, place the substrate obtained in step 3 on the sample stage of the magnetron sputtering instrument, install the Si target on the target base, and coat the Si single substance layer on the surface of the titanium alloy by DC sputtering. The purity is 99.99%, and the background vacuum is about 3×10 -4 Pa, the deposition temperature is 300°C, and the chamber pressure is 10 -3 Pa, the bias voltage is 200V, the argon flow rate is 15mL / min, and the continuous sputtering time is 60min; ...

Embodiment example 2

[0053] Step 1, the titanium alloy substrate is polished with 500#, 1000#, 1500#, 2000# sandpaper in sequence, and polished with abrasive paste;

[0054] Step 2, ultrasonically cleaning the titanium alloy substrate obtained in step 1 using absolute ethanol and deionized water in sequence, and the cleaning time is 20 minutes;

[0055] Step 3, drying the titanium alloy substrate obtained in step 2 in a blast drying oven, the drying temperature is 90°C, and the drying time is 80 minutes;

[0056] Step 4, place the substrate obtained in step 3 on the sample stage of the magnetron sputtering instrument, install the Si target on the target base, and coat the Si single substance layer on the surface of the titanium alloy by DC sputtering. The purity is 99.99%, and the background vacuum is about 3×10 -4 Pa, the deposition temperature is 500°C, and the chamber pressure is 10 -2 Pa, the bias voltage is 300V, the argon flow rate is 25mL / min, and the continuous sputtering time is 120min;...

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Abstract

The invention relates to a SiO2-mullite-Al2O3 multi-component gradient anti-oxidation coating and a preparation method thereof. The preparation method comprises the following steps: firstly, mechanically grinding a titanium alloy matrix, and then carrying out polishing treatment and ultrasonic cleaning; the cleaned titanium alloy matrix is dried in an air dry oven; plating a Si elementary substance layer on the surface of the titanium alloy by adopting a direct current sputtering mode on the dried substrate; carrying out oxidation treatment on the Si-plated substrate at a high temperature; taking out the titanium alloy substrate, and uniformly laying a layer of aluminum foil on the surface; placing the titanium alloy substrate in a vacuum furnace, preserving heat at high temperature to completely melt the titanium alloy substrate, and uniformly coating the titanium alloy substrate on the surface of the titanium alloy substrate; a titanium alloy substrate is subjected to oxidation treatment in air to obtain SiO2 and Al2O3, a mullite phase is generated through the reaction between the SiO2 and the Al2O3, and the SiO2-mullite-Al2O3 multi-component gradient anti-oxidation coating is obtained. According to the method, the oxidation resistance of the titanium alloy matrix can be improved.

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal materials, in particular to a SiO 2 - Mullite (3Al 2 o 3 2SiO2 2 )-Al 2 o 3 Multi-component gradient anti-oxidation coating and its preparation method. Background technique [0002] Titanium alloys have become important structural materials in aerospace and industrial fields due to their low density, high specific strength, and high specific modulus. However, the weakness of titanium alloy in oxidation resistance at high temperature greatly limits its application in high temperature conditions. Anti-oxidation coating is a common method to improve the performance of high-temperature structural parts. By coating the surface of the workpiece with an oxide coating with good high-temperature stability (such as SiO 2 、Cr 2 o 3 、Al 2 o 3 etc.) is an effective way to prolong the life of the workpiece. [0003] SiO 2 、Cr 2 o 3 、Al 2 o 3 Equal oxide coatings have been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/58C23C26/02C23C28/04C04B35/10C04B35/14C04B35/185C04B35/622C23C14/10
CPCC23C14/35C23C14/10C23C14/5853C23C26/02C23C28/04C04B35/14C04B35/185C04B35/10C04B35/62222
Inventor 崔雄华张磊曹海涛杨哲一崔锦文王弘喆
Owner XIAN THERMAL POWER RES INST CO LTD
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