Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gradient diamond/graphite composite self-lubricating anti-friction engineering ceramic coating and its preparation method

A technology of diamond coating and engineering ceramics, which is applied in the direction of metal material coating process, coating, gaseous chemical plating, etc., can solve the problems of toughness, hardness and insufficient bonding force, and achieve high internal toughness, improve growth quality, and internal Effect of high toughness and surface hardness

Active Publication Date: 2021-05-14
SHENYANG JIANZHU UNIVERSITY
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to improve and overcome the deficiencies of the prior art, to solve the problems of low surface hardness and non-uniform coating internal structure of the existing self-lubricating coatings that lead to insufficient toughness, hardness, and bonding force, and to provide A gradient diamond / graphite composite self-lubricating anti-friction engineering ceramic coating and its preparation method is a micron / submicron / nanometer diamond / graphite composite self-lubricating anti-friction coating on the surface of engineering ceramics and its preparation method. Composite self-lubricating anti-friction engineering ceramic coating presents a micron / submicron / nano-diamond / graphite coating with a step change or a multi-level gradient change, which improves the internal toughness and surface hardness of the coating, and strengthens the graphite and diamond coating, diamond coating Bonding strength of layer to engineered ceramic substrate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gradient diamond/graphite composite self-lubricating anti-friction engineering ceramic coating and its preparation method
  • Gradient diamond/graphite composite self-lubricating anti-friction engineering ceramic coating and its preparation method
  • Gradient diamond/graphite composite self-lubricating anti-friction engineering ceramic coating and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] In this embodiment, silicon nitride (Si 3 N 4 ) ceramics as an example, a composite self-lubricating anti-friction engineering ceramic coating is deposited on the surface of the silicon nitride ceramic substrate, the diameter of the silicon nitride ceramic substrate is 100mm, and the thickness is 10mm;

[0060] In this example:

[0061] In the micro-roughening treatment, the grade of abrasive paste used is W0.5;

[0062] In the chemical pretreatment, the composition of the prepared mixed acid solution is: sulfuric acid (H 2 SO 4 ) and hydrogen peroxide (H 2 o 2 ), its volume ratio is: H 2 SO 4 :H 2 o 2 =1:5;

[0063] Parameters of the nano-diamond particle suspension: in the nano-diamond particle suspension, the nano-diamond particle accounts for 10-15% of the total mass of the nano-diamond particle suspension.

[0064] A gradient diamond / graphite composite self-lubricating and anti-friction engineering ceramic coating, the self-lubricating and anti-friction ...

Embodiment 2

[0088] In this example, zirconia (ZrO 2 ) ceramics as an example, a composite self-lubricating anti-friction engineering ceramic coating is deposited on the surface of the zirconia ceramic substrate, the diameter of the zirconia ceramic substrate is 100mm, and the thickness is 10mm;

[0089] In this example:

[0090] In the micro-roughening treatment, the grade of abrasive paste used is W0.5;

[0091] In the chemical pretreatment, the composition of the prepared mixed acid solution is: sulfuric acid (H 2 SO 4 ) and hydrogen peroxide (H 2 o 2 ), its volume ratio is: H 2 SO 4 :H 2 o 2 =1:5;

[0092] Parameters of the nano-diamond particle suspension: in the nano-diamond particle suspension, the nano-diamond particle accounts for 10-15% of the total mass of the nano-diamond particle suspension.

[0093] A gradient diamond / graphite composite self-lubricating and anti-friction engineering ceramic coating, the self-lubricating and anti-friction engineering ceramic coating ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a gradient diamond / graphite composite self-lubricating antifriction engineering ceramic coating and a preparation method thereof, which belong to the field of self-lubricating and wear-resistant coatings for full ceramic bearings. The coating is successively multi-level size progressive diamond coating and multi-layer graphite coating from the surface of the engineering ceramic substrate; each level of size progressive diamond coating includes several layers of micro-crystalline diamond coating, several layers of sub-micro-crystalline Diamond coating, several layers of nanocrystalline diamond coating; the grain size of the diamond in the adjacent diamond coating presents a stepwise decrease from the surface of the engineering ceramic substrate to the outside. It is prepared by hot wire chemical vapor deposition. The coating presents a micron / submicron / nano-diamond / graphite coating with a step change or a multi-level gradient change, which improves the internal toughness and surface hardness of the coating, and enhances the adhesion between graphite and diamond coating, diamond coating and engineering ceramic substrate. Bond strength. It has good durability under extreme working conditions and stable self-lubricating performance.

Description

technical field [0001] The invention belongs to the technical field of self-lubricating and wear-resistant coatings for full ceramic bearings, and in particular relates to a gradient diamond / graphite composite self-lubricating and wear-reducing engineering ceramic coating and a preparation method thereof. Background technique [0002] All-ceramic bearings have excellent characteristics such as high temperature resistance, cold resistance, wear resistance, corrosion resistance, anti-magnetic and electrical insulation, oil-free self-lubrication, etc., and can be widely used in extremely harsh environments and special conditions such as aviation, aerospace, navigation, petroleum, and chemical industry , has gradually become an indispensable part of high-end equipment. However, the stability of the service performance of ceramic self-lubricating friction pairs has become a hot issue in related research fields for all-ceramic bearings under harsh working conditions such as hard d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/27C23C16/02C23C16/56
CPCC23C16/0227C23C16/029C23C16/271C23C16/56
Inventor 吴玉厚闫广宇王贺赵德宏陆峰
Owner SHENYANG JIANZHU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com