A kind of preparation method of thermal spraying high temperature resistant ceramic coating

A technology of high temperature resistant ceramics and thermal spraying, applied in coating, metal material coating process, melt spraying and other directions, can solve the problems of shortening the service life of ceramic coatings at high temperature, failing to meet the requirements of use, high temperature creep, etc. Good cooling effect, reliable cooling effect, prolonging service life at high temperature

Active Publication Date: 2020-07-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The problem to be solved by the present invention is: the high-temperature phase transition or high-temperature creep occurs in the ceramic coating due to the high temperature during use, which cannot meet the use requirements and seriously shortens the high-temperature service life of the ceramic coating.

Method used

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  • A kind of preparation method of thermal spraying high temperature resistant ceramic coating

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Comparison scheme
Effect test

Embodiment 1

[0020] The raw materials and mass fractions used in the method described in this embodiment are: 60 parts by weight of high-temperature strengthening agent, 20 parts by weight of binder, 10 parts by weight of temperature control agent, and 10 parts by weight of coolant, wherein the high-temperature strengthening agent is B 4 C, the binder is NiAl, the temperature control agent is SnO 2 , the coolant is Ni.

[0021] A preparation method of thermal spraying high temperature resistant ceramic coating, specifically comprising the following steps:

[0022] (1) The surface of the substrate is roughened by sandblasting, and then the sandblasting surface is cleaned with dry air. The sand material used in the rough sandblasting process is zirconium corundum with a particle size of 15-30 μm.

[0023] (2) Weigh 60gB 4 C powder, 20g NiAl powder, 10g SnO 2 , 10g copper clad Ni powder. The material is crushed by mechanical ball milling method, and passed through a 325-mesh mechanical vi...

Embodiment 2

[0028] The raw materials and mass fractions used in the method described in this embodiment are: 50 parts by weight of high-temperature strengthening agent, 30 parts by weight of binder, 12 parts by weight of temperature control agent, and 8 parts by weight of coolant, wherein the high-temperature strengthening agent is TIC, and the bonding agent The agent is NiCr, the temperature control agent is Cu, and the coolant is Sn.

[0029] In this embodiment, thermal spraying technology prepares the preparation and application method of high temperature resistant ceramic coating, the specific method is:

[0030] (1) The surface of the substrate is roughened by sandblasting, and then the sandblasting surface is cleaned with dry air. The sand material used in the rough sandblasting process is zirconium corundum with a particle size of 15-30 μm.

[0031] (2) Weigh 50g of TIC powder, 30g of NiCr powder, 12g of Cu powder, and 8g of copper-clad Sn powder. The material is crushed by mechan...

Embodiment 3

[0036] The raw materials and mass fractions used in the method described in this embodiment are: 50 parts by weight of high-temperature strengthening agent, 25 parts by weight of binder, 20 parts by weight of temperature control agent, and 5 parts by weight of coolant, wherein the high-temperature strengthening agent is TiN powder. The binder is CoCr powder, the temperature control agent is In2O3 powder, and the coolant is copper-coated Ti powder.

[0037] The preparation and application method of thermal spraying high temperature resistant ceramic coating in this embodiment, the specific method is:

[0038] (1) The surface of the substrate is roughened by sandblasting, and then the sandblasting surface is cleaned with dry air. The sand material used in the rough sandblasting process is zirconium corundum with a particle size of 15-30 μm.

[0039] (2) Weigh 50g TiN powder, 25g CoCr powder, 20gIn 2 o 3 Powder, 5g copper-coated Ti powder. The material is crushed by mechanical...

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Abstract

The invention discloses a thermal-spraying high-temperature-resisting ceramic coating layer preparation method and belongs to the field of thermal-spraying ceramic composite materials. The method disclosed by the invention comprises the steps: performing roughening and cleaning treatment on the surface of a matrix; then sending a binding agent into a powder feeder and spraying a bonding layer on the surface to be sprayed of the matrix; respectively sending high temperature enhancer and cooling agent mixed powder and a temperature control agent into two powder feeders and performing thermal spraying on the surface which the bond layer is sprayed to of the matrix to obtain a high-temperature-resisting ceramic coating layer. The high-temperature-resisting ceramic coating layer disclosed by the invention can form a porous coating layer main body with high-melting point metal in a use process to bear load and impact, and holes are filled with low-melting-point metal. When the coating layerworks under high temperature, the low-melting-point metal can evaporate and absorb heat, so that the coating layer is cooled, the service life of the coating layer is prolonged, and the coating layercan work under higher temperature.

Description

technical field [0001] The invention relates to a preparation method of thermal spraying high temperature resistant ceramic coating, which belongs to the technical field of thermal spraying. Background technique [0002] When the rocket engine is working, the propellant burns to generate a high-temperature gas flow, with a temperature as high as 3000K. The general nickel-based and cobalt-based superalloys, and even ceramic coatings cannot fully withstand such high temperatures. The materials of the engine injector panel, combustion thrust chamber lining and other parts cannot withstand such a high temperature, which affects the service life of the entire engine and causes a great waste of resources. [0003] To solve this problem, effective cooling measures are currently being taken on the basis of superalloys, including regenerative cooling, film cooling, radiation cooling, ablation cooling, etc. The rate is relatively poor, failing to achieve the original intention of sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/08C23C4/129C23C4/134
CPCC23C4/06C23C4/08C23C4/129C23C4/134
Inventor 宋鹏李乔磊黄太红陆建生
Owner KUNMING UNIV OF SCI & TECH
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