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Zirconia ceramic coating and preparation method thereof

A zirconia ceramic and zirconia technology, which is applied in the field of ion arc spraying, can solve the problems of inability to deposit and form dense coatings, blockage of spray gun conveying pipelines, and large specific surface area.

Pending Publication Date: 2019-03-08
陈涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its small mass and large specific surface area, zirconia nanoparticles have poor feeding performance, and the viscosity of the plasma gas is relatively high. During the spraying process, the nanoparticles are easy to block the delivery pipe of the spray gun.
In addition, the accelerated particles have a small momentum and cannot be deposited on the substrate to form a dense coating, so they cannot be directly used for spraying

Method used

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  • Zirconia ceramic coating and preparation method thereof
  • Zirconia ceramic coating and preparation method thereof
  • Zirconia ceramic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The present invention proposes a method for preparing zirconia liquid ceramics with high hardness, high wear resistance and high safety, such as Image 6 As shown, the main steps are as follows:

[0076] (1) Select the substrate:

[0077] The selection of the substrate should choose materials with wide material sources, low cost, low cutting difficulty and high strength. If necessary, materials that can still maintain certain plasticity, wear resistance and toughness after high temperature and high heat treatment should be selected. Here we give examples including wood, bamboo, metal materials, cement materials, resin materials, glass materials, carbon fiber materials and other substrates.

[0078] (2) Pretreatment of the substrate: sandblasting or frosting:

[0079] In order to allow the ceramic coating raw material and the substrate to be more closely combined, the substrate needs to be sandblasted or frosted. This step greatly increases the roughness of the substr...

Embodiment 2

[0104] A method for preparing zirconia liquid ceramics, comprising the steps of:

[0105] (1) Select the substrate:

[0106] Determine the substrate prepared by zirconia liquid ceramics. The selection of the substrate should be based on a wide range of materials, suitable for cost, low cutting difficulty and high strength. If necessary, it should still maintain a certain degree of plasticity, Abrasion-resistant and tough material.

[0107] (2) Pretreatment of the substrate: sandblasting (frosting) treatment.

[0108] Described blasting treatment refers to:

[0109] Use compressed air to beat the sand to the surface of the substrate in a sandblasting machine, and the pressure of the compressed air is about 0.7MPa. When sandblasting is used to treat the surface of the substrate, the spray gun nozzle and the substrate form an angle of 45 degrees, and move at a constant speed from one end of the substrate to the other end. After sandblasting, use compressed air to clean the sur...

Embodiment 3

[0127] All the steps are the same as in Example 1 or Example 2, the difference is that the zirconia raw material powder is obtained by the following steps:

[0128] Dissolve quantitative urea and zirconium nitrate in deionized water to prepare a zirconium nitrate mixture; add 1 part of Span-80 to a container containing 10 parts of xylene, and use electric stirring during the addition of Span-80 Stir the xylene mixed solution in the container, and when the xylene mixed solution in the container becomes uniform, add 1 part of the prepared zirconium nitrate mixed solution to the container, and obtain a white emulsion after emulsification for half an hour. Pour the emulsion into the reaction kettle, seal the reaction kettle and put it in an oven at 120 degrees Celsius for reaction. After 15 hours of reaction, take out the reaction kettle and wait for it to cool to room temperature, then open the reaction kettle to take samples to obtain white crystals; white crystals After filteri...

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Abstract

The invention belongs to the technical field of plasma arc spraying and particularly relates to a zirconia ceramic coating with high hardness, wear resistance, toughness and extensibility and a preparation method of the zirconia ceramic coating. The method comprises the following steps: (1.1) selecting a substrate; (1.2) performing sand blast or frosted pretreatment on the substrate; (1.3) preparing zirconia raw material powder; (1.4) heating the sintered zirconia nano-powder to a molten state; (1.5) spraying a liquid zirconia nanomaterial to form the liquid zirconia ceramic coating. The corestep lies in melting before spraying of the liquid zirconia nanomaterial, in the traditional alumina spraying technology, alumina nanoparticles are directly placed into a spray gun for heating spraying, however, a combination effect cannot meet demands for sufficient strength and adhesion. In the method, the sintered powder is molten into the molten state before spray gun charging, the defect is overcome, and comprehensive parameters such as strength, hardness and toughness of the ceramic coating are obviously better than those in the common spraying technology.

Description

technical field [0001] The invention belongs to the technical field of plasma arc spraying, and in particular relates to a zirconia ceramic coating with high hardness, high wear resistance, high toughness and high ductility and a preparation method thereof. Background technique [0002] In the field of industrial manufacturing and daily production, the surfaces and contact surfaces of most parts are the parts that are most likely to be damaged by friction and scratching, which will cause the function of the parts to fail, and eventually lead to the shutdown and scrapping of the entire device. With the leapfrog development of the second revolution of the global manufacturing industry, various production and processing equipment, assembled parts and other devices have higher and higher requirements for surface wear resistance, slip resistance, and scratch resistance. Obviously, if all the parts of a device as a whole use materials with excellent performance to improve the surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/653
CPCC04B35/48C04B35/62222C04B35/653C04B2235/3217
Inventor 陈涛
Owner 陈涛
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