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Preparation method of nano CeO2 reinforced NiCoCrAlY coating

A kind of coating and nanotechnology, applied in the field of new material preparation, can solve the problems of poor wear resistance, easy oxidation, limited use, etc., achieve excellent anti-friction and anti-wear performance, and improve the effect of friction and wear performance

Inactive Publication Date: 2020-03-27
CHANGZHOU UNIV
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  • Description
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  • Application Information

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Problems solved by technology

However, its own disadvantages such as poor wear resistance, low hardness and easy oxidation limit its use in friction conditions.

Method used

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  • Preparation method of nano CeO2 reinforced NiCoCrAlY coating
  • Preparation method of nano CeO2 reinforced NiCoCrAlY coating
  • Preparation method of nano CeO2 reinforced NiCoCrAlY coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] (1) After the substrate is ground, polished and sandblasted, it is cleaned with ethanol for use.

[0018] (2) figure 1 For the nano-CeO used 2 Enhanced NiCoCrAlY powder XRD phase. The powder is mainly composed of Ni, Co, Cr and Al, the content of Y is low, and no obvious peak is found.

[0019] (3) figure 2 For the prepared nano-CeO 2 Enhanced surface morphology of NiCoCrAlY coating. When nano-CeO 2 When the mass fraction was 2%, the dendrites on the coating surface increased, and a small amount of cellular crystals were dispersed around the dendrites. When nano-CeO 2 When the mass fraction is 4%, the surface of the coating is covered with coarse dendrites, the cellular crystals basically disappear, and the surface grains are coarsened. When nano-CeO 2 When the mass fraction was 6%, the coarse dendrites on the coating surface were broken, and the cellular crystals increased, mainly short dendrites and cellular crystals.

[0020] (4) image 3 For the prepared...

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Abstract

The invention relates to the field of surface modification treatment of TC4 alloy, and discloses a preparation method of a laser-cladding nano CeO2 reinforced NiCoCrAlY coating on the surface of TC4 alloy. The problems of poor wear resistance and cracks of the NiCoCrAlY coating are solved. The nano CeO2 added in the invention improves the microstructure of the coating, the friction factor and thewear rate are reduced along with the increase of the content of the nano CeO2, and excellent friction reduction performance is shown. The addition of the nano CeO2 promotes the formation of a reinforcing phase, improves the high-temperature friction and wear performance of a matrix, and is mainly suitable for being applied to a high-temperature friction-wear environment.

Description

technical field [0001] The present invention relates to a kind of nano CeO 2 The preparation method of reinforced NiCoCrAlY coating is mainly applied to the surface modification treatment of TC4 titanium alloy and belongs to the field of new material preparation. Background technique [0002] TC4 alloy has the characteristics of low density, high specific strength and corrosion resistance. It is one of the most widely used titanium alloys in the world, and its usage has exceeded 50% of the total titanium alloys. However, its own disadvantages such as poor wear resistance, low hardness and easy oxidation limit its use in friction conditions. [0003] MCrAlY (M is Ni, Co or a mixture of both) coatings, as an excellent thermal barrier coating, have been widely used in the high-temperature wear environment of titanium alloys. Rare earth (RE) materials have excellent physical and chemical properties, special electronic structures and large atomic radii, which can improve the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/123
CPCC23C4/06C23C4/123
Inventor 孔德军李嘉兴赵文张伟
Owner CHANGZHOU UNIV
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