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A carbon nano onion lubricating phase tin x Base self-lubricating composite material and preparation method thereof

A composite material and carbon nano-onion technology, applied in the field of composite materials, can solve the problems of inability to large-scale promotion, high cost, and failure of lubrication mechanism.

Active Publication Date: 2020-12-29
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the working parts of aerospace equipment are in extreme environments such as ultra-high and ultra-low temperature, vacuum, high speed, and corrosive media. Under such extreme conditions, conventional lubricants are very easy to evaporate, causing the lubrication mechanism to fail; Suitable for low-speed, low-load, low-temperature conditions; metal-based self-lubricating composite materials have superior mechanical properties of the base metal, but cannot cope with extreme conditions such as high and low temperature heavy loads, radiation, special medium corrosion, and thermal shock; superalloy materials , such as Ni-based and Co-based composite materials, are expensive and cannot be popularized on a large scale. Therefore, it is of practical significance to study a self-lubricating composite material suitable for extreme working conditions in space.

Method used

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  • A carbon nano onion lubricating phase tin <sub>x</sub> Base self-lubricating composite material and preparation method thereof
  • A carbon nano onion lubricating phase tin <sub>x</sub> Base self-lubricating composite material and preparation method thereof
  • A carbon nano onion lubricating phase tin <sub>x</sub> Base self-lubricating composite material and preparation method thereof

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Experimental program
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preparation example Construction

[0027] The carbon nano-onion lubricating phase TiN x The preparation method of base self-lubricating composite material comprises:

[0028] Step S1: annealing the detonation nano-diamond powder, vacuum degree 1~1.0×10 -2 Pa, the annealing temperature is 900-1800°C, and the temperature is kept for 0-2 hours to obtain OLC with a particle size of about 5nm.

[0029] Further, in a preferred embodiment of the present invention, the average grain size of the nano-diamond powder is 3-7nm, and the purity is greater than 98%.

[0030] Step S2: mix OLC and TiN by weight percentage x , carry out ball mill mixing, the mass ratio of ball and material is 5-10:1, the ball mill speed is 250-350r / min, the ball mill is 4-8h, each revolution is 20-40min, stop for 10-20min to dissipate heat, and obtain OLC-TiN x mixture;

[0031] Mix OLC and TiN by ball milling x , through mechanical alloying during the mixing process, the two components in the matrix diffuse each other to form a more active...

Embodiment 1

[0045] This embodiment provides a carbon nano onion lubricating phase TiN x Based self-lubricating composite material, its raw material formula and preparation method are as follows:

[0046] The weighing of the raw material formula is carried out according to the following percentages:

[0047] Table 2 raw material formula table (45g)

[0048]

[0049] S1. After putting the raw material powder composed of 3.17g of urea and 16.83g of titanium powder into a cemented carbide tank, add industrial ethanol as a dispersant, the ratio of ball to material is 10:1, and the ball milling medium is 8mm and 5mm in diameter. Carbide balls are repeatedly washed in the transition chamber of the glove box and then put into the operating cavity of the ball mill. The gas used is argon, and the sealing cover is covered to ensure that the tube is taken out and put into the ball mill under the argon environment. The gas used is Argon gas, cover the sealing cap, ensure that the tube is taken ou...

Embodiment 2

[0056] The weighing of the raw material formula is carried out according to the following percentages:

[0057] Table 4 raw material formula table (45g)

[0058]

[0059] S1. After putting the raw material powder composed of 4.01g of urea and 15.99g of titanium powder into a cemented carbide tank, add industrial ethanol as a dispersant, the ratio of ball to material is 20:1, and the ball milling medium is 8mm and 5mm in diameter. Carbide balls are repeatedly washed in the transition chamber of the glove box and then put into the operating cavity of the ball mill. The gas used is argon, and the sealing cover is covered to ensure that the tube is taken out and put into the ball mill under the argon environment. The gas used is Argon gas, cover the sealing cap, and ensure that the pipe is taken out under the argon gas environment and put into the ball mill. The ball milling speed is 350r / min, every revolution is 2h, and the machine is stopped for 30min to dissipate heat. After...

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Abstract

The invention provides a carbon nano onion lubricating phase Ti (C,N) base self-lubricating composite material and a preparing method thereof, and belongs to the technical field of composite materials. The composite material comprises, by weight percent, 10%-20% of OLC and 80%-90% of TiNx, wherein X in TiCx is larger than or equal to 0.4 and smaller than or equal to 0.9 or is equal to 1.1-1.3. According to the self-lubricating composite material, TiNx and OLC powder which are prepared through a mechanical alloying method and are in a non-stoichiometric ratio are mixed, hot pressing sintering is adopted for preparing the OLC lubricating phase Ti (C,N) base self-lubricating composite material, by utilization of the vacancy in TiNx, the sintering temperature can be reduced, and sintering is promoted. On the basis, the OLC lubricating phase Ti (C,N) base self-lubricating composite material is formed through composite sintering with OLC, the defect of lubricating failures of a traditional lubricating material in the extreme condition is overcome, and meanwhile hardness and fracture toughness of the OLC lubricating phase Ti (C,N) base self-lubricating composite material are improved.

Description

technical field [0001] The invention relates to the technical field of composite materials, and relates to a carbon nano-onion lubricating phase TiN x Base self-lubricating composite material and preparation method thereof. Background technique [0002] Most of the working parts of aerospace equipment are in extreme environments such as ultra-high and ultra-low temperature, vacuum, high speed, and corrosive media. Under such extreme conditions, conventional lubricants are very easy to evaporate, causing the lubrication mechanism to fail; Suitable for low-speed, low-load, low-temperature conditions; metal-based self-lubricating composite materials have superior mechanical properties of the base metal, but cannot cope with extreme conditions such as high and low temperature heavy loads, radiation, special medium corrosion, and thermal shock; superalloy materials , such as Ni-based and Co-based composite materials, are expensive and cannot be popularized on a large scale. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C26/00C22C29/04C22C1/05
CPCC22C1/058C22C26/00
Inventor 邹芹李艳国卢晓乾焦子剑代利峰娄志超王志伟赵亮陈伟东
Owner YANSHAN UNIV
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