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Preparing method of high-temperature low-friction nano gamma-Fe2O3/SiO2 composite coating on steel base body

A composite coating, low-friction technology, applied in the coating, metal material coating process, liquid chemical plating and other directions, can solve problems such as poor coating performance, and achieve the effect of low processing cost and simple process equipment requirements

Active Publication Date: 2018-06-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor coating performance of the above-mentioned high-temperature and low-friction nanocomposite coating due to insufficient control of the gelation evaporation area-to-volume ratio parameter, the present invention provides a high-temperature and low-friction nano-γ-Fe coating on a steel substrate. 2 o 3 / SiO 2 The preparation method of the composite coating is aimed at the sol-gel process of the nano-composite coating, especially the control of the area-to-volume ratio of the gelation evaporation, which can effectively improve the anti-friction performance of the coating obtained by the sol-gel method at high temperature

Method used

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  • Preparing method of high-temperature low-friction nano gamma-Fe2O3/SiO2 composite coating on steel base body
  • Preparing method of high-temperature low-friction nano gamma-Fe2O3/SiO2 composite coating on steel base body
  • Preparing method of high-temperature low-friction nano gamma-Fe2O3/SiO2 composite coating on steel base body

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Experimental program
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Effect test

Embodiment 1

[0014] The production technology of present embodiment is realized like this:

[0015] The first step is to prepare the sol: take 10.261g (0.0254mol) ferric nitrate nonahydrate lavender crystal and 10ml (0.044mol) ethyl tetrasilicate colorless liquid, pour them into a beaker in turn, then add 45ml ethanol solution, and use a glass rod After stirring to make it evenly mixed, hydrochloric acid was added dropwise to make the solution pH=0.9. Place the beaker on a magnetic stirrer and stir for 2 h to form a transparent sol.

[0016] The second step is to prepare the wet gel: transfer the sol to a Teflon tube (S / V=0.02) with a diameter of 36 mm and a volume of 100 ml, and then place it in a drying oven to dry at 50° C. for 8 days to produce a wet gel.

[0017] The third step of high-speed steel substrate treatment: use a large amount of deionized water to rinse the high-speed steel plate with a diameter of 30 mm to remove large particle pollutants attached to the surface of the hi...

Embodiment 2

[0024] The production technology of present embodiment is realized like this:

[0025] The first step is to prepare the sol: take 10.261g (0.0254mol) ferric nitrate nonahydrate lavender crystal and 10ml (0.044mol) ethyl tetrasilicate colorless liquid, pour them into a beaker in turn, then add 45ml ethanol solution, and use a glass rod After stirring to make it evenly mixed, hydrochloric acid was added dropwise to make the solution pH=0.9. Place the beaker on a magnetic stirrer and stir for 2 h to form a transparent sol.

[0026] The second step is to prepare the wet gel: transfer the sol to a Teflon tube (S / V=0.01) with a diameter of 18 mm and a volume of 100 ml, and then place it in a drying oven to dry at 80° C. for 5 days to produce a wet gel.

[0027] The third step of high-speed steel substrate treatment: use a large amount of deionized water to rinse the high-speed steel plate with a diameter of 30 mm to remove large particle pollutants attached to the surface of the hi...

Embodiment 3

[0032] The production technology of present embodiment is realized like this:

[0033]The first step is to prepare the sol: take 10.261g (0.0254mol) ferric nitrate nonahydrate lavender crystal and 10ml (0.044mol) ethyl tetrasilicate colorless liquid, pour them into a beaker in turn, then add 45ml ethanol solution, and use a glass rod After stirring to make it evenly mixed, hydrochloric acid was added dropwise to make the solution pH=0.9. Place the beaker on a magnetic stirrer and stir for 2 h to form a transparent sol.

[0034] The second step is to prepare the wet gel: transfer the sol to a Teflon tube (S / V=0.02) with a diameter of 36 mm and a volume of 100 ml, and then place it in a drying oven to dry at 80° C. for 5 days to produce a wet gel.

[0035] The third step of high-speed steel substrate treatment: use a large amount of deionized water to rinse the high-speed steel plate with a diameter of 30 mm to remove large particle pollutants attached to the surface of the hig...

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Abstract

The invention discloses a preparing method of a high-temperature low-friction nano gamma-Fe2O3 / SiO2 composite coating on a steel base body. A sol-gel method is adopted, through a hydrolytic polycondensation reaction of a precursor, sol is formed, sol is subject to standing for several days, wet gel is formed, the surface of the high-speed steel base body is coated with the wet gel, and through heat treatment, the nano gamma-Fe2O3 / SiO2 composite coating is obtained. The obtained nano gamma-Fe2O3 / SiO2 composite coating has the nuclear shell structure, and under the high-temperature environment,low friction smaller than 0.1 can be achieved.

Description

technical field [0001] The invention relates to a preparation method of a composite coating, in particular to a low-friction nanometer γ-Fe on a steel substrate under high temperature conditions 2 o 3 / SiO 2 The preparation method of the composite coating, according to the ratio of the evaporation area of ​​the container to the volume of the sol when the sol transforms into a gel, controls the nano-γ-Fe 2 o 3 / SiO 2 The particle size distribution of the composite controls the high temperature tribological properties of the composite coating. Background technique [0002] Nanocomposite coating refers to adding nanomaterials to the substrate surface coating or directly making nanomaterials into a coating through a specific process. Nano-coating has the characteristics of high hardness, high wear resistance, good toughness, oxidation resistance and high temperature resistance, so nano-composite coating is an effective solution to high-temperature friction problems. [000...

Claims

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Application Information

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IPC IPC(8): C23C18/12
Inventor 曾群锋蔡双利李双江陈通陈萱
Owner XI AN JIAOTONG UNIV
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