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Method for preparing amorphous ceramic coating

A ceramic coating, amorphous technology, applied in the coating, metal material coating process and other directions, can solve the problem of bonding defects between the substrate and the ceramic, the ceramic coating is prone to cracks, cracks and pores, etc., and achieves high glass forming ability. , excellent wear resistance, outstanding toughness and strength effect

Active Publication Date: 2014-07-30
DANYANG JUCHEN OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large thermal expansion, thermal conductivity and other performance differences between most metals and ceramics, it is easy to cause bonding defects between the substrate and ceramics, such as cracks and pores.
In addition, the ceramic material itself is brittle, and the laser processing process has the characteristics of rapid melting and rapid cooling, which makes the ceramic coating prone to cracks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An amorphous ceramic coating, which is made of a ceramic material for laser cladding, and its main part has an amorphous structure; wherein, the components of the ceramic material for laser cladding and the weight percentages of each component are as follows:

[0022] Aluminum oxide: 38.6%;

[0023] Zirconia 19%;

[0024] Lanthanum oxide 42.4%.

[0025] The preparation method of amorphous ceramic coating is as follows:

[0026] (1) Use the above weight percentage components as raw materials, add an appropriate amount of isopropanol and alumina balls, and mix by wet ball milling for 20 hours. The mixed powder is dried and passed through a 100-mesh sieve.

[0027] (2) 304 stainless steel is used as the substrate material for coating preparation, and the substrate is sandblasted before coating cladding.

[0028] (3) Cladding the above-mentioned mixed powder on the substrate by laser equipment using a laser cladding process to form the amorphous ceramic coating. The las...

Embodiment 2

[0031] An amorphous ceramic coating, an amorphous ceramic coating, which is made of a ceramic material for laser cladding, and its main part has an amorphous structure; wherein, the components of the ceramic material for laser cladding and each group The weight percent of part is as follows:

[0032] Aluminum oxide: 43%;

[0033] Zirconia 18%;

[0034] Cerium oxide 39%.

[0035] The preparation method of amorphous ceramic coating is as follows:

[0036] (1) Use the above weight percentage components as raw materials, add an appropriate amount of isopropanol and alumina balls, and mix by wet ball milling for 20 hours. The mixed powder is dried and passed through a 100-mesh sieve.

[0037] (2) The above mixed powder is evenly sprayed onto the surface of the substrate by atmospheric plasma spraying equipment to form a preset layer. The spraying parameters are: argon gas 40 L / Min, hydrogen gas 10 L / Min, voltage 68V, current 650A, coating thickness 50μm-2mm.

[0038] (3) Scan ...

Embodiment 3

[0041] An amorphous ceramic coating, an amorphous ceramic coating, which is made of a ceramic material for laser cladding, and its main part has an amorphous structure; wherein, the components of the ceramic material for laser cladding and each group The weight percent of part is as follows:

[0042] Aluminum oxide: 55.88%;

[0043] Zirconia 15.6%;

[0044] Yttrium oxide 28.6%.

[0045] The preparation method of amorphous ceramic coating is as follows:

[0046] (1) Use the above weight percentage components as raw materials, add an appropriate amount of isopropanol and alumina balls, and mix by wet ball milling for 20 hours. The mixed powder is dried and passed through a 100-mesh sieve.

[0047] (2) The mixed powder obtained in step (1) is mixed with the binder PVB to make a paste, and evenly bonded to the surface of the substrate to form a preset layer with a thickness of 100 μm-2 mm.

[0048] (3) According to the method described in the second embodiment, the pre-set lay...

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Abstract

The invention discloses a method for preparing an amorphous ceramic coating. The method comprises the following steps: processing laser cladding into a powder by using a ceramic material, cladding the powder onto a substrate through laser equipment by a laser cladding technology to form the an amorphous ceramic coating with amorphous structure on the main part. The laser cladding ceramic material comprises the following components: a 20%-75% of aluminum oxide, 10%-40% of zirconia and 10%-60% of rare earth oxide. The method provided by the invention improves the glass forming ability, avoids the phenomenon of easy generation of cracks due to rapid melting and rapid cooling in the processing of laser, greatly improves the rate of finished products and reduces the production cost; and the amorphous ceramic coating gains significantly improved toughness and strength and has excellent wear resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a method for preparing an amorphous ceramic coating, which belongs to the technical field of coatings. Background technique [0002] Currently, oxide ceramics (ZrO 2 、Al 2 o 3 etc.) coatings are widely used in the fields of machinery, electronics, petroleum, aerospace and biomedical engineering due to their excellent properties such as high melting point, high hardness, high temperature resistance, corrosion resistance, wear resistance and good chemical stability. Thermal spraying technology is currently the most widely used technology for preparing ceramic coatings. The process is simple and mature, and it can be prepared on a large scale. However, the characteristics of thermal spraying technology determine that the coating made by this technology presents a porous lath layer structure, and the existence of a large number of defects such as unmelted particles, pores and microcracks makes the performance of thermal spraying...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C04B35/10C04B35/50C04B35/48
Inventor 薛卫昌李丰杨立梅
Owner DANYANG JUCHEN OPTOELECTRONICS TECH
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