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a ti 2 Preparation method of alc corrosion resistant coating

A corrosion-resistant coating, ceramic coating technology, applied in coatings, electrolytic coatings, electrophoretic plating, etc., can solve problems such as difficulty in controlling the thickness and density of coatings, oxidative decomposition of coating materials, thermal damage to substrate materials, etc. , to achieve the effect of high efficiency and fast equipment requirements, promoting interface sintering, and controlling structure and thickness

Active Publication Date: 2021-03-23
SHANGHAI JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

Preparation of Ti by plasma spraying and ultra-high velocity flame spraying 2 AlC coating: On the one hand, the base material needs to withstand high temperature, which will cause thermal damage to the base material; on the other hand, in order to obtain a thicker and dense coating, the temperature of the spraying flame must be increased, which will make the coating The material is oxidized and decomposed, which will lead to poor performance of the coating, and high temperature will cause a large thermal stress inside the coating, causing defects in the coating
In order to overcome the above shortcomings, the researchers used cold spraying technology to prepare Ti 2 AlC coating, although it overcomes the problems of substrate damage and coating material oxidative decomposition caused by high temperature, it is difficult to control the thickness and density of the coating
At the same time, magnetron sputtering and other physical vapor deposition methods prepare Ti 2 AlC coating, this method also needs to heat the substrate, and the deposition efficiency is low and the cost is high
Therefore, the researchers proposed the electrophoretic deposition method to prepare the MAX phase coating, which is not only carried out in a solution at room temperature (lower preparation temperature), but also can deposit a coating on the surface of a substrate with a complex shape, but the coating prepared by this method is relatively weak. Poor, the final target coating must be obtained after post-sintering heat treatment, which will also cause thermal damage to the base material

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  • a ti <sub>2</sub> Preparation method of alc corrosion resistant coating

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preparation example Construction

[0032] A kind of Ti 2 The preparation method of AlC corrosion-resistant coating comprises:

[0033] (1) Take titanium aluminum carbon (Ti 2 AlC) powder (100nm-2μm) is dispersed in isopropanol, prepared into a suspension with a concentration of 20-80g / L, placed in an ultrasonic generator and vibrated for 30-100min, then taken out and placed on a magnetic stirrer for stirring 6 ~ 48h, configured into a uniform suspension A;

[0034] (2) Then add elemental tellurium (Te) to the above suspension A, control the concentration of elemental tellurium to 0.1-1.0g / L, then put the suspension A into the ultrasonic generator and vibrate for 30-100min, take it out and put it Stir on a magnetic stirrer for 6-48 hours to obtain suspension B;

[0035](3) Pour the suspension B into the polytetrafluoroethylene container, then clamp the ZIRLO alloy sample (15mm×20mm) after sandblasting on the cathode clamp of the polytetrafluoroethylene container cover, and use the graphite electrode as the an...

Embodiment 1

[0047] A kind of Ti 2 The preparation method of AlC corrosion-resistant coating comprises:

[0048] (1) Take titanium aluminum carbon (Ti 2 AlC) powder (200nm) was dispersed in isopropanol, prepared into a suspension with a concentration of 30 g / L, placed in an ultrasonic generator and vibrated for 40 minutes, then placed on a magnetic stirrer and stirred for 12 hours after taking it out, and configured into a uniform Suspension A;

[0049] (2) Then add elemental tellurium (Te) to the above-mentioned suspension A, control the concentration of elemental tellurium to be 0.2g / L, then put the suspension A into the ultrasonic generator and vibrate for 40min, take it out and place it on a magnetic stirrer Stir for 12h to obtain suspension B;

[0050] (3) Pour the suspension B into the polytetrafluoroethylene container, then clamp the ZIRLO alloy sample (15mm×20mm) after sandblasting on the cathode clamp of the polytetrafluoroethylene container cover, and use the graphite electrod...

Embodiment 2

[0053] A kind of Ti 2 The preparation method of AlC corrosion-resistant coating comprises:

[0054] (1) Take titanium aluminum carbon (Ti 2 AlC) powder (500nm) is dispersed in isopropanol, prepared into a suspension with a concentration of 50 g / L, placed in an ultrasonic generator and vibrated for 50 minutes, then placed on a magnetic stirrer and stirred for 18 hours after being taken out, and configured into a uniform Suspension A;

[0055] (2) Then add elemental tellurium (Te) to the above-mentioned suspension A, control the concentration of elemental tellurium to be 0.3g / L, then put the suspension A into the ultrasonic generator and vibrate for 50min, take it out and place it on a magnetic stirrer Stir for 18h to obtain suspension B;

[0056] (3) Pour the suspension B into the polytetrafluoroethylene container, then clamp the ZIRLO alloy sample (15mm×20mm) after sandblasting on the cathode clamp of the polytetrafluoroethylene container cover, and use the graphite electro...

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Abstract

The invention relates to a Ti2AlC corrosion resisting coating preparing method. Titanium aluminum carbon powder is scattered in isopropanol to be prepared into suspension liquid, then, simple substance tellurium is added, the mixed suspension liquid is arranged in a container, a ZIRLO alloy sample obtained after sand blasting treatment is clamped on a cathode clamp of a container cover, a graphiteelectrode serves as an anode to be immersed in the mixed suspension liquid to be subjected to pulse electrophoretic deposition treatment, flash burning sintering treatment is conducted after drying,and a dense and uniform Ti2AlC ceramic coating is obtained. Compared with the prior art, the flash burning technology is adopted in the method to assist high-voltage pulse electrophoretic deposition,and the uniform and dense Ti2AlC coating with good interface bonding and controllable components and structures is prepared on the surface of a zirconium alloy base body.

Description

technical field [0001] The invention relates to a method of depositing a coating, in particular to a Ti 2 Preparation method of AlC corrosion-resistant coating. Background technique [0002] Metallic Zr has excellent nuclear properties, 0.18×10 -28 m 2 The thermal neutron absorption section coefficient is second only to beryllium (0.009×10 -28 m 2 ), magnesium (0.06×10 -28 m 2 ) and aluminum (0.22×10 -28 m 2 ), and various Zr alloys used in the nuclear industry (such as Zr-2.5Nb, Zr-4, ) neutron cross section coefficient is only 0.20~0.24×10 -28 m 2 . Using Zr alloy instead of stainless steel as the nuclear reactor core structure material can save 1 / 2 uranium fuel and has high economic benefits. And because of the good compatibility between Zr and uranium, interdiffusion will only occur when the temperature is higher than 750 °C. Zr alloys have certain corrosion resistance in high temperature and high pressure water vapor at 300-400 °C, and have excellent neut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D13/02C25D13/18
CPCC25D13/02C25D13/18
Inventor 郝巍倪娜肖巍伟赵晓峰姚尧史银春
Owner SHANGHAI JIAOTONG UNIV
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