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Composite powder composition for ceramic coating and ceramic coating, and preparation method thereof

A ceramic coating and composite powder technology, applied in the field of wear-resistant coatings, can solve the problems of insufficient wear resistance of pure-phase ceramic coatings, unsatisfactory friction performance, and increased friction coefficient, so as to inhibit the initiation of cracks And expand, improve brittleness and wear resistance, improve the effect of wear resistance

Inactive Publication Date: 2015-06-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the fact that the wear resistance of the pure-phase ceramic coating in the prior art cannot reach higher and higher requirements for use, while carbon nanotubes (CNT) are used in ceramic composite coatings, and the friction performance is not ideal (mainly manifested as friction Coefficient increase) and high cost technical problems, one of the purposes is to provide a composite powder composition for ceramic coating, the composition not only includes yttria-stabilized zirconia powder, but also includes graphene nano Slices (GNs)

Method used

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  • Composite powder composition for ceramic coating and ceramic coating, and preparation method thereof
  • Composite powder composition for ceramic coating and ceramic coating, and preparation method thereof
  • Composite powder composition for ceramic coating and ceramic coating, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A. Preparation of composite powder composition by mechanical ball milling

[0025] Graphene nanosheets (GNs), yttria-stabilized zirconia powder (ZrO 2 :Y 2 o 3 The molar ratio is 1:3.2%), zirconia grinding balls (ZrO 2 :Y 2 o 3 The molar ratio is 1:3%) mixed according to the mass ratio of 1:99:200, put into a polytetrafluoroethylene grinding tank, and perform ball milling in a planetary ball mill, the ball milling speed is 400r / min, and the ball milling time is 300min. After passing through a 40-mesh sieve and drying at 110°C to obtain a composite powder composition, the XRD pattern is as follows: figure 1 Shown in a.

[0026] B. Preparation of ceramic coating by plasma spraying process

[0027] The surface of the titanium alloy (Ti-6Al-4V) was sandblasted (pressure 0.3 MPa), then ultrasonically cleaned twice in anhydrous ethanol solution for 4 minutes each time, and then dried at 110°C for 1.5 hours for later use.

[0028] Using the plasma spraying process, th...

Embodiment 2

[0046] A. Preparation of composite powder composition by mechanical ball milling

[0047] Graphene nanosheets (GNs), yttria-stabilized zirconia powder (ZrO 2 :Y 2 o 3 The molar ratio is 1:3.2%), zirconia grinding balls (ZrO 2 :Y 2 o 3 The molar ratio is 1:3%) mixed according to the mass ratio of 0.5:99.5:100, put into a polytetrafluoroethylene grinding tank, and perform ball milling in a planetary ball mill, the ball milling speed is 500r / min, and the ball milling time is 60min. After that, pass through a 40-mesh sieve, and dry at 100° C. for 1 hour to obtain a composite powder composition.

[0048] B. Preparation of ceramic coating by plasma spraying process

[0049] The surface of stainless steel (316L) was sandblasted (pressure 0.5MPa), then ultrasonically cleaned twice in anhydrous ethanol solution for 4 minutes each time, and then dried at 110°C for 1.5 hours before use.

[0050] Using the plasma spraying process, the composite powder composition is sprayed onto th...

Embodiment 3

[0064] A. Preparation of composite powder composition by mechanical ball milling

[0065] Graphene nanosheets (GNs), yttria-stabilized zirconia powder (ZrO 2 :Y 2 o 3 The molar ratio is 1:3.2%), zirconia grinding balls (ZrO 2 :Y 2 o 3 The molar ratio is 1:3%) mixed according to the mass ratio of 1.5:98.5:300, put into a polytetrafluoroethylene grinding tank, and perform ball milling in a planetary ball mill, the ball milling speed is 500r / min, and the ball milling time is 120min. Then pass through a 40-mesh sieve and dry at 120° C. to obtain a composite powder composition.

[0066] B. Preparation of ceramic coating by plasma spraying process

[0067] The surface of the titanium alloy (Ti-6Al-4V) was sandblasted (pressure 0.3MPa), then ultrasonically cleaned twice in anhydrous ethanol solution for 4min each time, and then dried at 100°C for 1 hour for later use.

[0068] Using the plasma spraying process, the composite powder composition is sprayed onto the treated titan...

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Abstract

The invention discloses a composite powder composition for a ceramic coating and a ceramic coating, and a preparation method thereof. The composite powder composition comprises an yttria stable zirconia powder and graphene nanosheets. The ceramic coating, which is obtained by spraying the composite powder composition on a metal substrate, has obviously higher wear resistance than the pure-phase yttria stable zirconia coating, can obviously reduce abrasive dust generated by friction under high-load conditions, and obviously lowers the friction factor and average abrasion rate. The invention provides a feasible solution for enhancing wear resistance of the ceramic coating. Besides, the method has the advantages of high efficiency, favorable repeatability and the like, and is simple to operate and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant coatings, and in particular relates to a composite powder composition for ceramic coatings, a ceramic coating and a preparation method thereof. Background technique [0002] As we all know, except for a few precious metals, metal materials will undergo chemical and electrochemical reactions with the surrounding medium and suffer from corrosion. In addition, the wear and tear caused by various mechanical effects on the metal surface is also extremely serious, and a large number of metal components fail due to corrosion and wear, resulting in great waste and loss. Therefore, the development of metal surface protection and strengthening technology is a major topic of general concern to experts and scholars. Coating ceramic coatings on metal surfaces by plasma spraying technology is an important method for preparing metal-ceramic composite materials. By comprehensively utilizing the excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626C23C4/12C23C4/11C23C4/134
Inventor 李虹庆谢有桃黄利平赵君李恺季珩郑学斌
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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