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Method for preparing ceramic coating resistant to solid particle erosion by plasmas

A solid particle, ceramic coating technology, applied in coating, ion implantation plating, metal material coating technology and other directions, can solve the problems of increased difficulty in coating preparation, unfavorable promotion and application, etc. High bonding strength

Pending Publication Date: 2020-08-04
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of studies have shown that the design of TiN / Ti multilayer structure can make the coating achieve a certain comprehensive performance of strength and toughness, but this complex coating structure makes the preparation of the coating more difficult, which is not conducive to the promotion and application in industrial production

Method used

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  • Method for preparing ceramic coating resistant to solid particle erosion by plasmas

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] (1) Preparation of TiZr alloy transition layer: Vacuum plasma arc deposition method is adopted, and TiZr alloy is used as plasma cathodic arc evaporation source. First, TiZr alloy is assembled on the vacuum chamber wall, and placed between the TiZr alloy and the vacuum chamber wall. Ceramic isolation pad, the thickness of the ceramic isolation pad is 2±0.1mm, to avoid short-circuiting between the TiZr alloy and the furnace wall of the vacuum chamber; enter Ar gas to make the vacuum chamber pressure 1×10 -1 ~9.9×10 -1 Pa, connect the TiZr alloy evaporation source and the vacuum chamber wall to the negative and positive poles of the power supply respectively to form a state where the TiZr alloy is the cathode and the vacuum chamber wall is the anode, and the arc electrode connected to the vacuum chamber is in contact with the TiZr alloy evaporation source instantly And quickly disconnected, the surface of the TiZr alloy evaporation source generates an arc discharge, and t...

Embodiment 1

[0016] First, the TC4 titanium alloy is processed into a Φ30×8mm disc, and the titanium alloy disc is pretreated before the coating is prepared. The pretreatment steps are as follows:

[0017] The titanium alloy discs were polished step by step with water sandpaper, and then polished. The polished titanium alloy discs were ultrasonically cleaned in absolute ethanol, dried and put into sample bags for use. The titanium alloy disc sample with surface pretreatment is put into the vacuum chamber for coating treatment;

[0018] The specific test parameters and steps are as follows:

[0019] Put the titanium alloy disc with the surface pretreatment into the furnace, keep the distance between the titanium alloy test piece and the cathode evaporation source at 250-260mm, then extract the vacuum to the ultimate vacuum degree, and then pass Ar into the furnace to make the furnace The air pressure is kept at 1.1-1.2Pa; after that, the workpiece voltage is adjusted to about -300V, and th...

Embodiment 2

[0022] First, the TC4 titanium alloy is processed into a Φ30×8mm disc, and the titanium alloy disc is pretreated before the coating is prepared. The pretreatment steps are as follows:

[0023] The titanium alloy discs were polished step by step with water sandpaper, and then polished. The polished titanium alloy discs were ultrasonically cleaned in absolute ethanol, dried and put into sample bags for use. The titanium alloy disc sample with surface pretreatment is put into the vacuum chamber for coating treatment.

[0024] The specific test parameters and steps are as follows:

[0025] Put the titanium alloy disc with the surface pretreatment into the furnace, keep the distance between the titanium alloy test piece and the cathode evaporation source at 250-260mm, then extract the vacuum to the ultimate vacuum degree, and then pass Ar into the furnace to make the furnace The air pressure is kept at 1.1-1.2Pa; after that, the workpiece voltage is adjusted to about -300V, and th...

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Abstract

The invention provides a method for preparing a ceramic coating resistant to solid particle erosion by plasmas. The method comprises the following steps that the TiZrN ceramic layer is prepared on thesurface of titanium alloy by changing element components of original cathode evaporation source, namely, TiZr alloy target material is adopted, so that the ceramic coating with high strength, high toughness and excellent comprehensiveness is obtained, the anti-erosion performance of large-attack-angle solid particles on the surface of metal materials such as titanium alloy is improved, and meanwhile the excellent anti-erosion performance of small-attack-angle solid particles is achieved. According to the method, Zr atoms with good solid solubility with Ti atoms are added into a Ti target material, the TiZr alloy target material is obtained, and the ceramic coating resistant to solid particle erosion is prepared on the surface of the titanium alloy through plasma arc deposition technology,the ceramic coating resistant to solid particle erosion is high in bonding strength with the titanium alloy matrix and good in toughness and comprehensive performance.

Description

technical field [0001] The invention relates to the field of metal material surface treatment, in particular to a metal surface anti-solid particle erosion method. Background technique [0002] As the main material for manufacturing high-performance aero-engine fans, compressor discs, aircraft landing gear and fasteners, and human implant joints, titanium alloy has low density, high specific strength, excellent corrosion resistance, and good biocompatibility , high-temperature mechanical properties, etc., can significantly reduce the weight of the aircraft, and contribute to the manufacture of new high-thrust ratio engines. However, the erosion of sand and gravel during aircraft takeoff and landing can easily damage the front blades of the engine, especially the erosion damage to the turbine blades of helicopters serving in the desert is more serious, and the occurrence of erosion defects seriously threatens the safety of the engine in service. Therefore, titanium The chara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/16C23C14/02
CPCC23C14/325C23C14/0641C23C14/16C23C14/025C23C14/0021
Inventor 刘道新马阿敏何光宇
Owner NORTHWESTERN POLYTECHNICAL UNIV
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