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High-performance ceramic coating and preparing method thereof

A ceramic coating, high-performance technology, applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problems of raw materials and processes that are not very mature, difficult to meet industrialization, etc., and achieve broad application prospects and economical Benefits, high production efficiency, and low overall cost

Inactive Publication Date: 2018-07-27
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing research focuses on the preparation of micro / nano coupling coatings using a single thermal spraying method, but this method is not very mature in terms of raw materials and process control, and it is difficult to meet the needs of industrialization
The present invention proposes to prepare the micro / nano coupling coating by combining plasma spraying and flame spraying, which is relatively simple in terms of raw material processing and process control, and has good application prospects, and no relevant research has been reported.

Method used

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  • High-performance ceramic coating and preparing method thereof
  • High-performance ceramic coating and preparing method thereof
  • High-performance ceramic coating and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this embodiment, micron powder selects TiO 2 Powder (particle size about 15-80μm), nano powder choose TiO 2 Powder (particle size about 10-100nm), nano-TiO in ceramic coating 2 The proportion of powder is 4wt%, and the thickness of the coating is about 50 μm. The specific preparation method of the coating is as follows:

[0052] 1. Use deionized water and alcohol as solvent, add 1wt% sodium carbonate powder as binder, add 4000ml of solvent into a 5000ml capacity beaker, and then weigh 4g of nano-TiO 2 Powder as solute. Put the configured nano-suspension into the ultrasonic cleaner and ultrasonically disperse for 30min, so as to reduce the concentration of nano-TiO 2 The agglomeration of the powder makes a relatively uniform nano-suspension.

[0053] 2. The substrate used is stainless steel. After cleaning, degreasing and derusting the substrate before spraying, put the substrate into the box dry sandblasting machine and use the pressure sandblasting method for su...

Embodiment 2

[0074] In this example, the specific preparation method of the ceramic coating is basically the same as that in Example 1, except that the proportion of nano-ceramic powder in the ceramic coating is 7 wt%.

[0075] Carry out following performance test to the ceramic coating that above-mentioned preparation obtains:

[0076] 1. Microhardness of the coating: The average hardness of the coating measured by the coating microhardness test method is 534.1HV.

[0077] 2. Coating adhesion: Through the coating adhesion test, the measured coating adhesion is 25.5N, which is higher than conventional coatings.

[0078] 3. Coating wear rate: using the coating friction and wear test method, the measured coating wear rate is 4.72×10 -7 mm 3 / N·m, the results show that the wear resistance of the coating is better than that of the conventional coating.

Embodiment 3

[0080] In this example, the specific preparation method of the high-performance ceramic coating is basically the same as that in Example 1, except that the powders used are micron Al 2 o 3 (particle size about 50μm) and nano-Al 2 o 3 (Particle size about 30nm) powder.

[0081] Carry out following performance test to the ceramic coating that above-mentioned preparation obtains:

[0082] 1. Microhardness of the coating: The average hardness of the coating measured by the coating microhardness test method is 575.4HV.

[0083] 2. Coating adhesion: Through the coating adhesion test, the measured coating adhesion is 37.5N, which is higher than the conventional coating.

[0084] 3. Coating wear rate: using the coating friction and wear test method, the measured coating wear rate is 5.45×10 -7 mm 3 / N·m, the results show that the wear resistance of the coating is better than that of the conventional coating.

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Abstract

The invention relates to the technical field of material surface treatment, in particular to a high-performance ceramic coating and a preparing method thereof. According to the method, micron ceramicpowder and nano ceramic powder serve as raw materials, the plasma spraying and flame spraying combined manner is adopted, and a high-performance ceramic coating is formed on the surface of a base body; and according to the plasma spraying and flame spraying combined manner, plasma spraying and flame spraying are formed at a time. The high-performance ceramic coating with the micron / nano coupling effect is prepared through combination of the two spraying technologies. The high-performance ceramic coating and the preparing method thereof have the beneficial effects that a large number of holes in the micron ceramic powder coating are reduced, the holes are filled with the nano ceramic powder, and accordingly density of the coating is improved; the difficult problems that the nano ceramic powder is difficult to convey and prone to ablation are solved; due to the combination action of the micron nano powder and the nano ceramic powder, the bonding strength of the ceramic coating is enhanced; and the strength and tenacity of the coating are improved, and the purpose of improving the abrasion resisting performance of the coating is achieved.

Description

technical field [0001] The invention relates to the technical field of surface treatment of materials, in particular to a high-performance ceramic coating and a preparation method thereof. Background technique [0002] Thermal spraying is a technological technology with a long history, one of the key technologies of surface engineering, and an important means of maintenance and remanufacturing. At present, most of the parts in China are made of metal materials. Due to long-term use, the wear of the parts is very obvious. Therefore, thermal spray coatings are widely used in the surface strengthening of key parts of mechanical equipment, especially spray coating. The emergence of ceramic coating technology is widely used in the field of surface technology engineering. [0003] Ceramic coatings mainly include high-melting glass with or without addition, high-temperature ceramics mainly composed of oxides, carbides, silicides, borides or nitrides, cermets and other inorganic ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/129C23C4/10
CPCC23C4/10C23C4/129C23C4/134
Inventor 袁建辉张勇谭礼明陈晓晓
Owner SHANGHAI UNIV OF ENG SCI
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