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Preparation method for porous zirconium oxide thermal barrier coating

A technology of thermal barrier coating and zirconia, applied in coating, metal material coating process, fusion spraying, etc., can solve the problems of difficult preparation of thick coating, strict equipment requirements, high thermal conductivity of coating, etc., to achieve Effective control of porosity, stable mechanical and chemical properties, and abundant raw material resources

Inactive Publication Date: 2018-02-16
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of electron beam physical vapor deposition to prepare coatings are: 1) the deposition rate is low, the process is cumbersome, the production efficiency is low, and it is difficult to prepare thick coatings; 2) the requirements for equipment are strict, the equipment is complicated and expensive, and the implementation cost 3) The deposited coating has a relatively dense columnar crystal structure, and the thermal conductivity of the coating is still high, which is unfavorable for thermal barrier coatings
CN101307424A discloses a preparation process of zirconia coating, which uses arc ion plating technology to reactively deposit zirconia coating. The zirconia coating has a dense structure, so the coating has high thermal conductivity and poor heat insulation performance

Method used

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  • Preparation method for porous zirconium oxide thermal barrier coating
  • Preparation method for porous zirconium oxide thermal barrier coating
  • Preparation method for porous zirconium oxide thermal barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The first step is to prepare the zirconia-based composite powder for thermal spraying:

[0044] Using nano-zirconia powder stabilized by 8% (mass percentage) yttrium oxide, the above-mentioned nano-zirconia powder with a particle size range of 0.001 to 0.1 microns and polyether ether ketone with a particle size range of 1 to 50 microns are used to make pores Agent powder is evenly mixed into a composite powder, wherein the above-mentioned nano-zirconia powder accounts for 75% by mass of the total mass of the composite powder, and the mass percent of the polyetheretherketone pore-forming agent powder accounts for the total mass of the composite powder is 25%, and then Uniformly mix into binder polyvinyl alcohol, the weight ratio of polyvinyl alcohol consumption is above-mentioned composite powder: polyvinyl alcohol=100: 0.1, is formulated into the zirconia base composite powder that is used for thermal spraying thus;

[0045] The second step, metal matrix material pretre...

Embodiment 2

[0056] The first step is to prepare the zirconia-based composite powder for thermal spraying:

[0057] Using nano-zirconia powder stabilized by 8% (mass percentage) yttrium oxide, the above-mentioned nano-zirconia powder with a particle size range of 0.001 to 0.1 microns and medium-density polyethylene with a particle size range of 1 to 50 microns are used to make pores Agent powder is uniformly mixed into a composite powder, wherein the above-mentioned nano-zirconia powder accounts for 90% by mass of the total mass of the composite powder, and the mass percent of the medium-density polyethylene pore-forming agent powder accounts for the total mass of the composite powder is 10%, and then Evenly mix into binder methylcellulose, the weight ratio of methylcellulose consumption is above-mentioned composite powder: methylcellulose=100: 1, is formulated into the zirconia-based composite powder that is used for thermal spraying thus;

[0058] The second step, metal matrix material p...

Embodiment 3

[0065] The first step is to prepare the zirconia-based composite powder for thermal spraying:

[0066] Using nano-zirconia powder stabilized by 8% (mass percentage) yttrium oxide, the above-mentioned nano-zirconia powder with a particle size ranging from 0.001 to 0.1 microns and ethylene-tetrafluoroethylene with a particle size ranging from 1 to 50 microns are copolymerized The material pore-forming agent powder is uniformly mixed into a composite powder, wherein the above-mentioned nano-zirconia powder accounts for 60% by mass of the total mass of the composite powder, and the mass percent of the organic pore-former powder accounts for the total mass of the composite powder is 40%, and then Evenly mix into binder methylcellulose, the weight ratio of methylcellulose consumption is above-mentioned composite powder: methylcellulose=100: 2, thus be mixed with the zirconia-based composite powder that is used for thermal spraying;

[0067] The second step, metal matrix material pre...

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Abstract

The invention discloses a preparation method for a porous zirconium oxide thermal barrier coating, and relates to coating of metal materials by oxides. The method for preparing the porous zirconium oxide thermal barrier coating by combining a thermal spraying technology with thermal treatment comprises the following steps of: uniformly mixing nano zirconium oxide powder stabilized by 8% (in percentage by mass) of yttrium oxide and high-molecular polymer pore-forming agent powder to obtain a mixture, uniformly mixing a binder to prepare zirconium oxide based composite powder used for thermal spraying; pre-treating a metal matrix material; preparing a porous zirconium oxide coating through a thermal spraying method; and thermally treating the porous zirconium oxide coating, thereby preparingthe porous zirconium oxide thermal barrier coating on the surface of the metal matrix material. According to the preparation method disclosed by the invention, effective control on porosity can be realized by regulating components and adding amount of the pore-forming agent, so that porosity is obviously improved, and therefore, heat insulation of the coating is also improved. The preparation method overcomes various defects of electron beam physical vapor deposition in the prior art for preparing the porous zirconium oxide thermal barrier coating.

Description

technical field [0001] The technical scheme of the invention relates to the coating of metal materials with oxides, in particular to the preparation method of the porous zirconia thermal barrier coating. Background technique [0002] With the advancement of science and technology, the development of aerospace and civil vehicles, the temperature requirements for the hot end parts are getting higher and higher. The current superalloy materials and single crystal materials can no longer meet the requirements for the use of hot end parts. Thermal barrier coatings combine the high strength and toughness of metals with the high temperature resistance of ceramics. It has good heat insulation, thermal fatigue resistance, high temperature oxidation resistance and corrosion resistance. It has been used in combustion Materials for hot-end parts such as steam turbines and turbine blades have been widely used, and the service life of hot-end parts at high temperatures has been effectivel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/11C23C4/134C23C4/129C23C4/126C23C4/18
CPCC23C4/11C23C4/126C23C4/129C23C4/134C23C4/18
Inventor 杨勇张晨赵策策高鹏悦褚振华陈学广王磊董艳春张建新阎殿然
Owner HEBEI UNIV OF TECH
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