Copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material with controllable porosity and preparation method of copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material

A composite material and wide temperature range technology, which is applied in the field of copper-based wide temperature range liquid-solid synergistic self-lubricating composite materials and its preparation, can solve the problems of poor bonding between ferrous sulfide and copper matrix, low mechanical strength of composite materials, and continuous matrix Improve the mechanical strength and tribological properties, improve the liquid-solid synergistic lubrication performance, and improve the lubrication effect

Active Publication Date: 2022-12-02
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the shortcomings of the above-mentioned prior art, the present invention provides a copper-based wide temperature range liquid-solid synergistic self-lubricating composite material with controllable porosity and a preparation method thereof to solve the problem of poor bonding between ferrous sulfide and copper matrix, The addition of FeS leads to the decrease of matrix continuity, low mechanical strength and poor tribological properties of composites

Method used

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  • Copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material with controllable porosity and preparation method of copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material
  • Copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material with controllable porosity and preparation method of copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material
  • Copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material with controllable porosity and preparation method of copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The operation steps for preparing the copper-based wide temperature range liquid-solid synergistic self-lubricating composite material with controllable porosity are as follows:

[0051] 1. Preparation of ferrous sulfide powder coated with nickel nitrate with a mass fraction of 85%

[0052] Cleaning: Ultrasonic dispersion of FeS powder in absolute ethanol for 15-20 minutes, remove the absolute ethanol and put it in a drying oven at 50-80°C for 1-2 hours;

[0053] Adhesive solution preparation: take 5g of polyvinyl alcohol and add it into 95g of pure water, fully dissolve it under the condition of heating in a water bath (95°C), and prepare a polyvinyl alcohol aqueous solution with a mass fraction of 5%.

[0054] Mixed solution preparation: 10 g of nickel nitrate was added to 5% polyvinyl alcohol solution for thorough stirring and dissolution to prepare a mixed solution.

[0055] Nickel nitrate coating: Add 85g of FeS powder into the mixed solution of polyvinyl alcohol ...

Embodiment 2

[0068] The operation steps for preparing the copper-based wide temperature range liquid-solid synergistic self-lubricating composite material with controllable porosity are as follows:

[0069] 1. Preparation of ferrous sulfide powder coated with nickel nitrate with a mass fraction of 70%

[0070] Cleaning: Place 70g of FeS powder in absolute ethanol for ultrasonic dispersion for 15-20min, remove the absolute ethanol and put it in a drying oven at 50-80°C for 1-2 hours;

[0071] Adhesive solution preparation: take 5g of polyvinyl alcohol and add it into 95g of pure water, fully dissolve it under the condition of heating in a water bath (95°C), and prepare a polyvinyl alcohol aqueous solution with a mass fraction of 5%.

[0072] Mixed solution preparation: 25g of nickel nitrate was added to 5% polyvinyl alcohol solution for thorough stirring and dissolution to prepare a mixed solution.

[0073] Nickel nitrate coating: Add 70g of FeS powder into the mixed solution of polyvinyl ...

Embodiment 3

[0080] Embodiment 3: the difference with embodiment 1 is that the FeS without coating nickel nitrate is directly added

[0081] The operation steps for preparing copper-based wide temperature range liquid-solid synergistic self-lubricating composite material not coated with nickel nitrate are as follows:

[0082] 1. Add copper-tin alloy with a particle size of 200 mesh, ferrous sulfide powder with a particle size of 100 mesh, and bismuth powder with a particle size of 200 mesh into the planetary ball mill tank at a mass ratio of 85:9:6, and grind it at a low speed in an argon atmosphere. After ball milling for 6 hours, the rotating speed of the ball milling tank was 150r / min, and the ball-to-material ratio was 10:1 to obtain a mixed powder in which nickel nitrate-coated FeS and Bi powder were uniformly dispersed and embedded on flaky CuSn10 flakes.

[0083] The mixed powder was subjected to high-speed ball milling (450 rpm) for 1 h again to obtain a layered granular mixed powd...

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Abstract

The invention discloses a porosity-controllable copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material and a preparation method thereof. The copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material is obtained by processing components including a copper alloy matrix, a solid lubricant, a liquid lubricant and the like. According to the method, nickel nitrate has a high decomposition temperature, firstly, FeS is subjected to nickel nitrate coating treatment and in-situ reaction in green body sintering to generate nickel-coated FeS, bonding of FeS and a copper alloy matrix is improved, high-temperature continuous reaction in the material sintering process can be met, gas is generated, uniform through holes are formed in the material, and the through holes are uniformly formed in the material; the porosity of the material can be regulated and controlled, the oil storage capacity can be improved, and the through holes are more beneficial to conveying lubricating oil to a friction interface so as to achieve better lubricating and antifriction effects. According to the method, the service conditions of the copper-based composite material are greatly widened, and a new scheme and thought are provided for research and development of a novel controllable-porosity copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material.

Description

technical field [0001] The invention relates to a copper-based wide temperature range liquid-solid synergistic self-lubricating composite material with controllable porosity and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] Copper-based self-lubricating composite material is a promising solid lubricating material to solve lubrication problems in high-tech fields. Therefore, it is widely used in the motion system of mechanical equipment, such as seal rings, bushes, bearings and guide rails. With the continuous development of aerospace industry technology, the service environment of mechanical equipment has become more and more harsh. In order to enable the equipment to adapt to work tasks under different conditions and perform well, the performance requirements for copper-based self-lubricating composite materials are also increasing. higher. This requires that copper-based self-lubricating composite materials not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/02C22C9/00C22C32/00C22C1/05B22F9/04B22F3/11B22F3/26B22F1/105
CPCC22C9/02C22C9/00C22C32/0089C22C1/05B22F9/04B22F3/1007B22F3/001B22F3/1143B22F3/1134B22F3/26B22F2009/043Y02P10/25
Inventor 尹延国刘聪吴玉程李蓉蓉郑海飞
Owner HEFEI UNIV OF TECH
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