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Process for producing nano-carbon tube reinforced porous oil-retaining bearing

A technology of carbon nanotubes and bearings, which is applied in the field of preparation of porous oil-containing bearings, can solve the problems of no carbon nanotubes, etc., and achieve the effects of long service life, increased oil content, and expanded use range

Inactive Publication Date: 2009-12-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is no report of carbon nanotubes used in porous oil-impregnated bearings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of carbon nanotube reinforced copper-tin-based porous oil-impregnated bearing comprises the following steps:

[0028] (1) Treatment of carbon nanotube surface:

[0029] a oxidation purification: put 2g carbon nanotubes into 250ml concentrated HNO 3 Boil at 140°C for 2 hours, then soak at room temperature for 24 hours.

[0030] b sensitization: the carbon nanotubes after the above-mentioned oxidative purification at a concentration of 0.1MSnCl 2 Sensitized in 250ml solution for 60min.

[0031] c activation: the above-mentioned carbon nanotubes after sensitization at a concentration of 0.0024M PdCl 2 Activated in 250ml of solution for 60min.

[0032] d Surface copper plating: put the activated carbon nanotubes into the prepared plating solution, and plate copper at a temperature of 70°C.

[0033] (2) Preparation of carbon nanotube reinforced porous oil bearing

[0034] a Mixed powder: 0.5wt% of the copper-plated carbon nanotubes and 99.5wt% of...

Embodiment 2

[0038] The preparation method of carbon nanotube reinforced iron-copper-based porous oil-impregnated bearing comprises the following steps:

[0039] (1) Treatment of carbon nanotube surface:

[0040] a Oxidation purification: put 750ml concentrated HNO into 6g carbon nanotubes 3 , boiled at a temperature of 140°C for 3h, then soaked at room temperature for 36h,

[0041] b sensitization: the carbon nanotubes after the above oxidation purification were treated at a concentration of 0.1M SnCl 2 Sensitized in 750ml of solution for 90min,

[0042] c activation: the above-mentioned carbon nanotubes after sensitization at a concentration of 0.0024M PdCl 2 750ml of the solution activated for 90min,

[0043] d Surface copper plating: put the activated carbon nanotubes into the prepared plating solution, and plate copper at a temperature of 70°C.

[0044] (2) Preparation of carbon nanotube reinforced porous oil bearing

[0045] a Mixing and powder making: 1.0wt% of carbon nanotube...

Embodiment 3

[0049] The preparation method of carbon nanotube reinforced iron-copper-based porous oil-impregnated bearing comprises the following steps:

[0050] (1) Treatment of carbon nanotube surface:

[0051] a Oxidation purification: put 750ml concentrated HNO into 6g carbon nanotubes 3 Boil at 150°C for 3 hours, then soak at room temperature for 36 hours.

[0052] b sensitization: the carbon nanotubes after the above oxidation purification were treated at a concentration of 0.1M SnCl 2 Sensitize in 750ml mixed solution of +0.1M HCl for 60min.

[0053] c activation: the above-mentioned carbon nanotubes after sensitization at a concentration of 0.0024M PdCl 2 +0.25M HCl mixed solution 750ml activation 60min.

[0054] d Surface copper plating: put the activated carbon nanotubes into the prepared plating solution, and plate copper at a temperature of 70°C.

[0055] (2) Preparation of carbon nanotube reinforced porous oil bearing

[0056] a mixed powder: the above-mentioned copper-p...

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Abstract

The invention discloses a preparation method of carbon nanotube reinforced porous oil bearing, which is characterized in that 0.5-5.0wt% of surface-treated carbon nanotubes, 99.5-95.0wt% of metal powder and an appropriate amount of dispersant are mixed in a mortar Grind by hand or ball mill in a ball mill to mix evenly, dry in an oven, fill the mixed powder into a molding mold, press it into a preform under a pressure of 0.8-1.0T, and then put it into a sintering furnace and decompose it in an NH3 atmosphere The sintering temperature is 760-890°C, and the sintering time is 2-3 hours; then the sintered bearing is finished under a pressure of 0.8-1.0T, and immersed in oil for 15-30 minutes to obtain carbon nanotube reinforcement. Porous oil-impregnated bearings.

Description

technical field [0001] The invention relates to a preparation method of a carbon nanotube reinforced porous oil-containing bearing, in particular to a preparation method of a carbon nanotube reinforced copper-tin-based, iron-copper-based or copper-coated iron-based porous oil-containing bearing, belonging to the field of preparation of porous oil-containing bearings. Background technique [0002] Porous oil-impregnated bearings are bearings that can directly store lubricating oil to achieve self-lubrication. Its matrix is ​​processed into a porous structure with a certain degree of permeability. After it is made, it is impregnated with lubricating oil, so that the lubricating oil can be filled into the pores of the matrix and stored. When the bearing is running, the lubricating oil seeps out from the pores to lubricate the working surface; when it stops running, the lubricant returns to the porous matrix for storage. During work, the loss of lubricant is very small, so ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16F16C33/12
Inventor 刘颖杨雪娟李梦李军连利仙涂铭旌
Owner SICHUAN UNIV