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Multilayered high-temperature-resistant Ti/Zr codoped diamond-like coating and preparation method thereof

A diamond coating and co-doping technology, applied in the field of coating deposition, can solve the problems of poor thermal stability, low bonding strength of film base, high internal stress of diamond-like coating, reduce internal stress, prevent peeling and cracking, The effect of reducing the accumulation of internal stress

Active Publication Date: 2018-11-02
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-layer high temperature resistant Ti / Zr co-doped diamond-like coating and its preparation method, to solve the problems of high internal stress of the diamond-like coating, low bonding strength of the film base, and poor thermal stability, and to overcome The lack of single element doping ensures that the diamond-like carbon coating can maintain good wear resistance and service life under special working conditions, and meet its practical application requirements

Method used

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  • Multilayered high-temperature-resistant Ti/Zr codoped diamond-like coating and preparation method thereof
  • Multilayered high-temperature-resistant Ti/Zr codoped diamond-like coating and preparation method thereof
  • Multilayered high-temperature-resistant Ti/Zr codoped diamond-like coating and preparation method thereof

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preparation example Construction

[0055] Another aspect of the present invention provides a method for preparing a multilayer high temperature resistant Ti / Zr co-doped diamond-like coating, the specific steps are as follows:

[0056] (a) Pretreatment of the substrate:

[0057] Use sandpaper and polishing cloth to polish the substrate to a mirror structure, and ultrasonically clean it in acetone and absolute ethanol for 5 to 15 minutes, dry it and place it on the stage of the magnetic filter cathodic vacuum arc deposition system, facing the ion source , adjust the distance between the stage and the ion source to be 5-40cm;

[0058] Preferably, the distance between the stage and the ion source is adjusted to be 15-40 cm;

[0059] (b) Sputter cleaning of substrate surface:

[0060] The magnetic filter cathodic vacuum arc deposition technology is adopted, and 99.9% titanium, zirconium, and titanium zirconium alloy are used as targets. The magnetic filter cathodic vacuum arc deposition system can work at the same...

Embodiment 1

[0080] (a) Using a magnetic filter cathodic vacuum arc deposition system, keep the vacuum chamber pressure less than or equal to 4×10 before starting the coating -3 Pa, using titanium-zirconium alloy (Ti:Zr=3:1) as the target material, turn off the gas flow, turn on the arc power supply, adjust the arc starting current to 90A, the elbow magnetic field current to 4.0A, the negative bias to -900V, and the duty cycle The ratio is 90%, and the surface of the substrate is sputtered and cleaned for 2 minutes;

[0081] (b) On the basis of step (a), adjust the negative bias voltage to -300V, the duty cycle to 80%, and deposit the TiZr bonding layer on the surface of the substrate after cleaning, and the deposition time is 5 minutes;

[0082](c) On the basis of step (b), feed acetylene gas into the vacuum chamber, and adjust the gas feed rate to be 5sccm, 10sccm, 15sccm, 20sccm to deposit the intermediate transition layer successively, at the deposition of each gas feed rate The time ...

Embodiment 2

[0087] All the experimental parameters and experimental procedures in this example are exactly the same as those in Example 1, only the Ti:Zr=3:1 of the titanium-zirconium alloy target in Example 1 needs to be changed to Ti:Zr=4:1 / 5 :1 titanium-zirconium alloy target to obtain multi-layer high temperature resistant Ti / Zr co-doped diamond-like coating.

[0088] When the titanium-zirconium alloy target material Ti:Zr=4:1, the prepared Ti / Zr co-doped diamond-like coating was tested, and it was found that the thickness of the bonding layer TiZr was 0.4 μm, and the intermediate transition layer (Ti , Zr) The thickness of C is 0.6 μm, and the thickness of surface coating Ti / Zr co-doped diamond-like carbon coating is 1.1 μ m; The content of Ti in its surface coating Ti / Zr co-doped diamond-like coating is 5.53at .%, Zr content is 1.69at.%.

[0089] When the titanium-zirconium alloy target material Ti:Zr=5:1, the prepared Ti / Zr co-doped diamond-like coating was tested, and the thickne...

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Abstract

The invention relates to a multilayered high-temperature-resistant Ti / Zr codoped diamond-like coating and a preparation method thereof. The coating structurally comprises a bonding layer, an intermediate transition layer and a surface coating, wherein the bonding layer comprises metals TiZr, the intermediate transition layer comprises (Ti, Zr)C and the surface coating comprises (Ti, Zr) / DLC. The preparation method comprises the step of successively depositing the bonding layer, the intermediate transition layer in gradient change in component and the surface coating on the surface of a substrate after pre-treatment by adopting a magnetic filtration cathode vacuum arc deposition technology. The multilayered high-temperature-resistant Ti / Zr codoped diamond-like coating prepared by means of amulti-element codoping technology, a multi-layered coating technology and the magnetic filtration cathode vacuum arc deposition technology is low in internal stress, high in hardness, excellent in film base bonding strength, high-temperature resistant and friction resistant, the service life of the diamond-like coating is prolonged, and the application field of the coating is expanded.

Description

technical field [0001] The invention belongs to the technical field of coating deposition, in particular to a multi-layer high temperature resistant Ti / Zr co-doped diamond-like coating and a preparation method thereof. Background technique [0002] Diamond-like Carbon (DLC) coatings have excellent properties such as high hardness, high elastic modulus, low friction coefficient, good corrosion resistance and chemical inertness, and are used as lubricating coatings and wear-resistant materials in the aerospace field. Very broad application prospects. [0003] However, the study found that the diamond-like carbon coating has the disadvantages of high internal stress and poor high temperature resistance: on the one hand, the internal stress generated by the DLC film during the growth process and the stress caused by the mismatch of the film base make the DLC film prone to cracks (cracks), The film-base binding force is poor, which limits the thickness and service life of the DL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/14
CPCC23C14/0605C23C14/0611C23C14/14C23C14/325C23C28/343C23C28/36
Inventor 齐福刚曹红帅欧阳晓平李贝贝罗文忠钟向丽赵镍刘应都陈静
Owner XIANGTAN UNIV
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