Preparation method for VN/Ag wide-temperature-area lubricating composite films

A composite film, wide temperature range technology, applied in the field of preparation of VN/Ag wide temperature range lubricating composite film, to achieve the effect of simple preparation process, continuous and reliable lubricity

Inactive Publication Date: 2019-04-16
LANZHOU CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the lubrication problems from low temperature to high temperature or temperature alternating environment, no solid lubricant can meet the requirements of this working condition alone

Method used

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  • Preparation method for VN/Ag wide-temperature-area lubricating composite films
  • Preparation method for VN/Ag wide-temperature-area lubricating composite films
  • Preparation method for VN/Ag wide-temperature-area lubricating composite films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of a VN / Ag wide temperature range lubricating composite film in this example uses a single-beam pulsed laser deposition technology to prepare a VN / Ag wide temperature range lubricating composite film on the substrate to be deposited with the VN / Ag composite target as the target ,Specific steps are as follows:

[0025] (1) Treatment of substrate to be deposited:

[0026] First, after removing the impurities attached to the surface of the Inconel718 alloy substrate to be deposited, ultrasonic cleaning was performed in acetone and absolute ethanol for 10 minutes, dried with nitrogen, and stored in vacuum;

[0027] (2) VN / Ag composite target:

[0028] Take the VN target and the Ag target with a purity of 99.99%, respectively, and cut the VN target and the Ag target into equal parts with a diamond wire cutting machine to obtain several VN targets with the same central angle (for example, the central angle in this embodiment is 45 degrees). Segment, A...

Embodiment 2

[0034]The preparation method of a VN / Ag wide temperature range lubricating composite film in this example uses a single-beam pulsed laser deposition technology to prepare a VN / Ag wide temperature range lubricating composite film on the substrate to be deposited with the VN / Ag composite target as the target ,Specific steps are as follows:

[0035] (1) Treatment of substrate to be deposited:

[0036] First, after removing the impurities attached to the surface of the Inconel718 alloy substrate to be deposited, ultrasonic cleaning was performed in acetone and absolute ethanol for 20 minutes, dried with nitrogen, and stored in vacuum;

[0037] (2) VN / Ag composite target:

[0038] Take the VN target and the Ag target with a purity of 99.99%, respectively, and cut the VN target and the Ag target into equal parts with a diamond wire cutting machine to obtain several VN targets with the same central angle (for example, the central angle in this embodiment is 30 degrees). segment, Ag...

Embodiment 3

[0044] The preparation method of a VN / Ag wide temperature range lubricating composite film in this example uses a single-beam pulsed laser deposition technology to prepare a VN / Ag wide temperature range lubricating composite film on the substrate to be deposited with the VN / Ag composite target as the target ,Specific steps are as follows:

[0045] (1) Treatment of substrate to be deposited:

[0046] First, after removing the impurities attached to the surface of the Inconel718 alloy substrate to be deposited, ultrasonic cleaning was performed in acetone and absolute ethanol for 16 minutes, dried with nitrogen, and stored in vacuum;

[0047] (2) VN / Ag composite target:

[0048] Take the VN target and the Ag target with a purity of 99.99%, respectively, and cut the VN target and the Ag target into equal parts with a diamond wire cutting machine to obtain several VN targets with the same central angle (for example, the central angle in this embodiment is 60 degrees). Segment, A...

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Abstract

The invention discloses a preparation method for VN/Ag wide-temperature-area lubricating composite films; and aiming at a single-beam pulse laser deposition system, VN/Ag composite films meeting a chemical metering ratio are prepared by one step through a target assembly process. The prepared composite films have uniform and compact microscopic structures; Ag particles with sizes of 10-20 nm are uniformly embedded in VN basal bodies; Ag is used as low/medium-temperature lubricating phases, and high-temperature friction chemical reaction products of vanadium oxide and silver vanadate are used as medium/high-temperature lubricating phase to realize continuous lubrication within a range from room temperature to 900 DEG C; and the friction coefficient in the range from room temperature to 900DEG C is maintained within 0.08-0.3, so that the effective anti-friction lubricating effect is achieved. The preparation method prepares the composite films with continuous and reliable lubricity; andthe preparation process is simple, and can be widely applied to wear resistance and friction reduction of mechanical parts under a wide temperature area.

Description

technical field [0001] The invention relates to the technical field of surface coatings, in particular to a preparation method of a VN / Ag wide temperature range lubricating composite film. Background technique [0002] With the rapid development of modern metal thermal processing, aerospace, nuclear energy and other industries, many mechanical parts are required to work under harsh conditions such as ultra-high temperature, high speed and special media. The temperature can reach above 650°C; the working temperature of the bearing liner of the adiabatic diesel engine reaches 600°C-1000°C; the gas inlet temperature of the advanced aero-engine has reached 1370°C. Under certain working conditions, ternary and quaternary hard films such as TiAlN and TiAlCrN are formed by adding Al and Cr alloying elements on the basis of TiN hard film, so that the working temperature of the workpiece can be increased to above 800°C to meet its oxidation resistance. performance requirements. Dop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/28C23C14/06
CPCC23C14/0688C23C14/28
Inventor 国洪建贾均红胡伟周晶晶
Owner LANZHOU CITY UNIV
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