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A kind of carbon fiber-carbon nanotube reinforced nial base self-lubricating composite material and preparation method thereof

A composite material, carbon nanotube technology, applied in the field of materials, can solve the problems of weak surface binding force of CF-CNTs, CNTs falling off, etc., and achieve the effect of improving binding ability, enhancing surface binding force, and surface binding firmly

Inactive Publication Date: 2019-08-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface binding force of CF-CNTs prepared by CVD method is weak, and CNTs are easy to fall off from the CF surface.

Method used

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  • A kind of carbon fiber-carbon nanotube reinforced nial base self-lubricating composite material and preparation method thereof
  • A kind of carbon fiber-carbon nanotube reinforced nial base self-lubricating composite material and preparation method thereof

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preparation example Construction

[0028] In the following examples, the CF-CNTs reinforced NiAl-based self-lubricating composite material is prepared from CF-CNTs plated with silver and NiAl powder containing Ag. The present invention provides a specific preparation method, but does not limit its preparation method. CNTs grown on the CF surface and CF-CNTs reinforced NiAl-Ag self-lubricating composite materials prepared by other methods that meet the requirements of the present invention also belong to the protection scope of the present invention .

[0029] The invention provides a method for preparing CF-CNTs reinforced NiAl-based self-lubricating composite material, comprising the following steps:

[0030] 1) First remove the gel on CF: place CF in a muffle furnace and burn it in the air at 400°C for 15-20 minutes; then use electrochemical anodic oxidation to modify the surface of CF after degumming, Namely choose 5wt.% NH 4 HCO 4 The solution is used as an electrolyte solution, the modification time is ...

Embodiment 1

[0036] A self-lubricating composite material is composed of a matrix material, a lubricating phase and a reinforcing phase, and is a NiAl-based self-lubricating composite material with Ag as the lubricating phase and CF-CNTs as the reinforcing phase. The mass of the lubricating phase Ag is 5.0wt.% of the mass of the matrix material, and the reinforcing phase CF-CNTs is 3vol.% of the raw material volume of the matrix material. The matrix material includes elements Al, Mo, Nb, B, Cr and Ni, and the mass ratio of elements Al, Mo, Nb, B, Cr and Ni is: 30.0:2.0:1.5:0.5:2.0:64.0.

[0037] The preparation method of the above-mentioned self-lubricating composite material comprises the following steps:

[0038] 1) First, remove the gel on the CF: put the CF in a muffle furnace and burn it in the air at 400°C for 15 minutes; then use the electrochemical anodic oxidation method to modify the surface of the CF after the gel removal. Use 5wt.% NH 4 HCO 4 The solution is used as an elect...

Embodiment 2

[0046] A self-lubricating composite material is composed of a matrix material, a lubricating phase and a reinforcing phase, and is a NiAl-based self-lubricating composite material with Ag as the lubricating phase and CF-CNTs as the reinforcing phase. The mass of the lubricating phase Ag is 7.5wt.% of the mass of the matrix material, and the reinforcing phase CF-CNTs is 4vol.% of the raw material volume of the matrix material. The matrix material includes elements Al, Mo, Nb, B, Cr and Ni, and the mass ratio of elements Al, Mo, Nb, B, Cr and Ni is: 30.0:2.0:1.5:0.5:2.0:64.0.

[0047] The preparation method of the above-mentioned self-lubricating composite material comprises the following steps:

[0048] 1) First, remove the gel on the CF: put the CF in a muffle furnace and burn it in the air at 400°C for 15 minutes; then use the electrochemical anodic oxidation method to modify the surface of the CF after the gel removal. Use 5wt.% NH 4 HCO 4 The solution is used as an elect...

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Abstract

The invention relates to a method for preparing a CF (carbon fiber)-CNTs (carbon nanotubes) enhanced NiAl (nickel and aluminum)-based self-lubricating composite material. The self-lubricating composite material is a novel NiAl-based self-lubricating composite material using Ag (silver) as a lubricating phase and CF-CNTS as an enhancing phase. The method comprises the following steps of growing CNTs on the CF surface by a CVD (chemical vapor deposition) method; utilizing a solid-phase method or a liquid-phase method to prepare the CF-CNTs enhanced metal-based self-lubricating composite material. The prepared CF-CNTs enhanced NiAl-based self-lubricating composite material has the advantages that the CNTS are firmly bonded with CF; the Ag lubricating phase can quickly diffuse to the frictionsurface, the lubricating effect is realized, and the friction stage of components and parts is shortened.

Description

technical field [0001] The invention relates to a method for preparing a carbon fiber (CF)-carbon nanotube (CNTs) reinforced NiAl-based self-lubricating composite material, belonging to the field of materials. Background technique [0002] There are two ways for the solid lubricant to lubricate in the self-lubricating composite material: one is that the composite material is partially worn, and the solid lubricant in the worn material is released for lubrication; the other is solid lubrication The agent is enriched from the composite to the worn surface and only a small amount of the composite is worn. The solid lubricant silver has a large diffusion coefficient, and its lubrication mechanism is obviously the second. The prerequisite for the first type of solid lubricant to lubricate is that a part of the composite material must be worn. For the second type of solid lubricant, the running-in phase can be shortened, so increasing the speed of silver enrichment to the wear s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C49/08C22C49/14C22C47/04C22C47/14C23C16/02C23C16/26C23C16/06C22C101/10C22C121/02
Inventor 史晓亮邓骁斌闫昭刘锡尧黄玉春卢冠辰陈远
Owner WUHAN UNIV OF TECH