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Method for preparing Al/Al2O3 multifunctional coating by flame spraying

A multi-functional coating and flame spraying technology, applied in the fields of high temperature resistance, wear resistance, and improving the corrosion resistance of parts substrates, can solve the problems of high use cost, large gas consumption, and high equipment requirements, and improve the resistance to gas flow erosion. ability, the ability to improve wear resistance, the effect of good metal plasticity

Active Publication Date: 2015-12-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Al / Al 2 o 3 Ceramic rods can be directly prepared by flame spraying technology. This technology has the advantages of simple process, convenient operation, excellent coating performance, and wide application area. High cost, complex process parameters, complex operation, low equipment portability and other defects
In addition, flame spraying of ceramic rods is a newly developed high-tech. At present, there is no research on flame spraying Al / Al 2 o 3 Related research on ceramic rods

Method used

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  • Method for preparing Al/Al2O3 multifunctional coating by flame spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of flame spraying of the present invention prepares Al / Al 2 o 3 The method for multifunctional coating, it comprises the steps:

[0036] (1) Preparation of uniform Al / Al by ball milling 2 o 3 Composite coating powder, ball milling and mixing for 8 hours;

[0037] Said Al / Al 2 o 3 Composite coating powder includes the following components:

[0038] Al, the mass percentage is 45%;

[0039] Al 2 o 3 , the mass percentage is 50%;

[0040] B 2 o 3 , the mass percentage is 3%;

[0041] SiO 2 , the mass percentage is 1%;

[0042] Si, the mass percentage is 1%;

[0043] The Al, Al 2 o 3 , SiO 2 , B 2 o 3 Powder, average purity >99%, particle size 1-2 μm.

[0044] (2) the Al / Al of step (1) 2 o 3 Composite coating powder, PVA (polyvinyl alcohol) and PEG (polyethylene glycol) mixed solution, glycerin, and liquid paraffin are mixed in a vacuum mixer until a mud mass is formed, and the mud mass is extruded to form a green body;

[0045] Said Al / Al 2 o...

Embodiment 2

[0058] A kind of flame spraying of the present invention prepares Al / Al 2 o 3 The method for multifunctional coating, it comprises the steps:

[0059] (1) Preparation of uniform Al / Al by ball milling 2 o 3 Composite coating powder, ball milling and mixing for 8 hours;

[0060] Said Al / Al 2 o 3 Composite coating powder includes the following components:

[0061] Al, the mass percentage is 1%;

[0062] Al 2 o 3 , the mass percentage is 95%;

[0063] B 2 o 3 , the mass percentage is 4%;

[0064] The Al, Al 2 o 3 , B 2 o 3 Powder, average purity >99%, particle size 4-5μm.

[0065] (2) the Al / Al of step (1) 2 o 3 Composite coating powder, PVA (polyvinyl alcohol) and PEG (polyethylene glycol) mixed solution, glycerin, and liquid paraffin are mixed in a vacuum mixer until a mud mass is formed, and the mud mass is extruded to form a green body;

[0066] Said Al / Al 2 o 3 The proportioning of composite coating powder, PVA (polyvinyl alcohol) and PEG (polyethylene g...

Embodiment 3

[0077] A kind of flame spraying of the present invention prepares Al / Al 2 o 3 The method for multifunctional coating, it comprises the steps:

[0078] (1) Preparation of uniform Al / Al by ball milling 2 o 3 Composite coating powder, ball milling and mixing for 8 hours;

[0079] Said Al / Al 2 o 3 Composite coating powder includes the following components:

[0080] Al, the mass percentage is 95%;

[0081] Al 2 o 3 , the mass percentage is 1%;

[0082] B 2 o 3 , the mass percentage is 2%;

[0083] SiO 2 , the mass percentage is 1.5%;

[0084] Si, the mass percentage is 0.5%;

[0085] (2) the Al / Al of step (1) 2 o 3 Composite coating powder, PVA (polyvinyl alcohol) and PEG (polyethylene glycol) mixed solution, glycerin, and liquid paraffin are mixed in a vacuum mixer until a mud mass is formed, and the mud mass is extruded to form a green body;

[0086] Said Al / Al 2 o 3 The proportioning of composite coating powder, PVA (polyvinyl alcohol) and PEG (polyethylene g...

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Abstract

The invention provides a method for preparing Al / Al2O3 multifunctional coating by flame spraying. The method comprises the following steps: (1) mixing by adopting a ball-milling method to prepare uniform Al / Al2O3 composite coating powder; (2) mixing the Al / Al2O3 composite coating powder, a polyvinyl alcohol and polyethylene glycol mixed solution, glycerol and liquid paraffin in a vacuum mixer until a mud pie is formed, extruding and forming the mud pie to form a green body; (3) sintering the green body, firstly preserving the temperature of the green body for 1-3 hours at 400-600 DEG C, then, preserving the temperature of the green body for 5-7 hours at 1600-2000 DEG C, and finally forming an Al / Al2O3 composite ceramic rod as a spraying raw material; (4) pre-heating a base body to be repaired or processed, and controlling the temperature of the base body to 100-200 DEG C; and (5) preparing a composite multifunctional ceramic coating material on the base body by adopting a flame spraying method. The composite ceramic coating prepared by the method disclosed by the invention has comprehensive performances of good corrosion resistance, wear resistance and high temperature resistance, and has bonding strength greater than 20MPa.

Description

technical field [0001] The invention belongs to the coating field of metal materials, and in particular relates to a method for improving the corrosion resistance, wear resistance and high temperature resistance of parts (steel, aluminum) substrates. Background technique [0002] Aiming at the problem of parts being worn and corroded during use, thermal spraying technology is used to repair the defective parts of the parts during use (and it can also be repaired repeatedly), which can greatly reduce the cost of the entire part. Replacement costs greatly save raw materials and reduce costs. In addition, compared with the original unpainted parts, the service life of the repaired parts can be doubled, which greatly improves the production efficiency. Before the parts are put into use, spraying and processing them can double the service life of the parts, greatly reduce the production cost, and significantly improve the economic benefits. [0003] Al has good atmospheric corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12
Inventor 文波倪立勇马康智杨震晓吴朝军杨杰
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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