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Ceramic/metal gradient high-temperature composite coating on titanium alloy surface and preparation method thereof

A composite coating and titanium alloy technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problem of inability to reflect the long-term stability information of the coating, limited high-temperature oxidation resistance, failure At the same time, taking into account the problems of room temperature and high temperature friction and wear properties, to achieve the effects of excellent high temperature oxidation resistance, good macroscopic quality, and good dry sliding friction and wear resistance

Active Publication Date: 2018-02-23
QINGDAO BINHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of alloyed layer mainly focuses on high-temperature oxidation resistance, and fails to take into account both room temperature and high temperature friction and wear properties.
In addition, the effect of a single alloying coating on improving the high-temperature oxidation resistance of titanium alloys is limited, and the research time on the high-temperature oxidation resistance of the above-mentioned coatings is mostly concentrated in 0-100h, which cannot reflect the long-term stability information of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A ceramic / metal gradient high-temperature composite coating on the surface of titanium alloy is carried out in the arc glow ion metal infiltration equipment. The specific steps are as follows: first, the arc glow plasma technology is used to prepare aluminum-rich Ti-Al on the surface of the titanium alloy. -Nb-Si multi-element alloying layer, the preparation conditions are: the mass ratio of the alloy target is Al:Nb:Si=10:3:1, the argon pressure is 30Pa, the titanium alloy substrate sample is used as the cathode, the titanium alloy and the target The distance is 22mm, the cathode voltage is 900V, the arc target current is 60A, the metal penetration time is 70min, and the temperature of the titanium alloy sample is 1000°C. Then, the multi-component alloyed sample prepared above is subjected to a double-layer glow ion nitriding process under the atmosphere of nitrogen and argon, so that a ceramic layer mainly composed of titanium aluminum nitride is formed on the surface ...

Embodiment 2

[0029] A ceramic / metal gradient high-temperature composite coating on the surface of titanium alloy is carried out in the arc glow ion metal infiltration equipment. The specific steps are as follows: first, the arc glow plasma technology is used to prepare aluminum-rich Ti-Al on the surface of the titanium alloy. -Nb-Si multi-element alloyed layer, the preparation conditions are: the mass ratio of the alloy target is Al:Nb:Si=10:2:1, the argon pressure is 25Pa, the titanium alloy substrate sample is used as the cathode, the titanium alloy and the target The distance is 25mm, the cathode voltage is 850V, the arc target current is 60A, the metal penetration time is 60min, the temperature of the titanium alloy sample is 950°C, and then the multi-element alloyed sample prepared above is subjected to double-layer glow in the atmosphere of nitrogen and argon. The ion nitriding process forms a ceramic layer mainly composed of titanium aluminum nitride on the surface of the alloying la...

Embodiment 3

[0035]A ceramic / metal gradient high-temperature composite coating on the surface of titanium alloy is carried out in the arc glow ion metal infiltration equipment. The specific steps are as follows: first, the arc glow plasma technology is used to prepare aluminum-rich Ti-Al on the surface of the titanium alloy. -Nb-Si multi-element alloying layer, the preparation conditions are: the mass ratio of the alloy target is Al:Nb:Si=10:2:2, the argon pressure is 30Pa, the titanium alloy substrate sample is used as the cathode, the titanium alloy and the target The distance is 22mm, the cathode voltage is 900V, the arc target current is 60A, the metal penetration time is 70min, and the temperature of the titanium alloy sample is 1000°C. Then, the multi-component alloyed sample prepared above is subjected to a double-layer glow ion nitriding process under the atmosphere of nitrogen and argon, so that a ceramic layer mainly composed of titanium aluminum nitride is formed on the surface o...

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Abstract

The invention relates to a ceramic / metal gradient high-temperature composite coating on the surface of a titanium alloy and a preparation method thereof. The titanium alloy is used as a substrate, an Al-Nb-Si alloy is used as a target material, and the gradient high-temperature composite coating is prepared by arc glow plasma. The coating consists of two parts, the inner layer of the coating is an aluminum-rich Ti-Al-Nb-Si multi-alloyed metal layer with excellent high-temperature oxidation resistance and good thermophysical properties matching with the substrate, and the outer layer of the coating is an excellent Titanium-aluminum nitride-based ceramic layer with high temperature oxidation resistance and friction and wear performance, and the chemical composition of the coating is gradually changed. The gradient high-temperature composite coating of the present invention not only has excellent high-temperature oxidation resistance, but also has good room temperature and high-temperature dry sliding friction and wear resistance, and the coating and the titanium alloy substrate are in a typical metallurgical bond, and the bond is firm.

Description

technical field [0001] The invention relates to a ceramic / metal gradient high-temperature composite coating on the surface of a titanium alloy and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] The principle of arc-added glow ion infiltration technology is to introduce a cold cathode arc source into the double-layer glow ion infiltration metal device, set an auxiliary source around the workpiece to be processed, and use the hollow cathode effect of glow discharge to rapidly heat up the workpiece. It is both The heating source is also an auxiliary supply source of the elements to be infiltrated. At the same time, one or more metal cathode arc target sources are set on the wall of the vacuum container, and the arc source is ignited by vacuum arc discharge to continuously emit a flow of high-energy, high-current density, and high-ionization-rate metal ions to be infiltrated on the workpiece. Under the action...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/52C23C8/36C23C12/00
CPCC23C8/36C23C10/52C23C12/00
Inventor 戴景杰翟明戈侯顺强朱季云李守英庄蕾张丰云王阿敏
Owner QINGDAO BINHAI UNIV
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