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

Method for making gradient silicon carbide coating by electrophoresis codeposition

A gradient silicon carbide, electrophoretic co-deposition technology, applied in the direction of coating, electrolytic coating, etc., can solve the problems of difficult suspension, poor operability, complex equipment, etc., to avoid coating peeling, uniform coating, repeatability Good results

Inactive Publication Date: 2009-10-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can theoretically prepare a gradient coating, the equipment is complicated and the cost is high; and it is difficult to ensure that the suspension is uniform, resulting in poor operability

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix silicon powder, carbon black, binder polyvinyl butyral (PVB), acetone, and additive n-butylamine in a mass ratio of 10:20:15:100:1 to prepare a slurry, and prepare a stable suspension by ultrasonic treatment for 4 minutes Liquid A is ready for use; silicon powder, carbon black, PVB, acetone, and n-butylamine are mixed according to the mass ratio of 20:20:15:100:1 to prepare a slurry, and a stable suspension B is prepared by ultrasonic treatment for 4 minutes; the silicon powder, Carbon black, PVB, acetone, and additive n-butylamine were mixed in a mass ratio of 20:10:15:100:1 to prepare a slurry, and a stable suspension C was prepared by ultrasonic treatment for 4 minutes; silicon powder, carbon black, PVB, acetone, n-Butylamine was mixed at a mass ratio of 40:10:15:100:1 to prepare a slurry, and a stable suspension D was prepared by ultrasonic treatment for 4 minutes. The average particle size of silicon powder used above is 40nm, and the average particle size of c...

Embodiment 2

[0021] Mix silicon powder, carbon black, binder polyvinyl butyral (PVB), acetone, and additive n-butylamine in a mass ratio of 8:20:15:100:1 to prepare a slurry, and prepare a stable suspension by ultrasonic treatment for 4 minutes Liquid A is ready for use; silicon powder, carbon black, PVB, acetone, and n-butylamine are mixed according to the mass ratio of 18:20:15:100:1 to prepare a slurry, and a stable suspension B is prepared by ultrasonic treatment for 4 minutes; the silicon powder, Carbon black, PVB, acetone, and additive n-butylamine were mixed according to the mass ratio of 25:10:15:100:1 to prepare a slurry, and a stable suspension C was prepared by ultrasonic treatment for 4 minutes; silicon powder, carbon black, PVB, acetone, n-Butylamine was mixed at a mass ratio of 50:10:15:100:1 to prepare a slurry, and a stable suspension D was prepared by ultrasonic treatment for 4 minutes. The average particle size of silicon powder used above is 100nm, and the average partic...

Embodiment 3

[0023] Mix silicon powder, carbon black, binder polyvinyl butyral (PVB), acetone, and additive n-butylamine in a mass ratio of 12:20:15:100:1 to prepare a slurry, and prepare a stable suspension by ultrasonic treatment for 5 minutes Liquid A is ready for use; silicon powder, carbon black, PVB, acetone, and n-butylamine are mixed according to the mass ratio of 24:20:15:100:1 to prepare a slurry, and a stable suspension B is prepared by ultrasonic treatment for 5 minutes; the silicon powder, Carbon black, PVB, acetone, and additive n-butylamine were mixed according to the mass ratio of 20:10:15:100:1 to prepare a slurry, and a stable suspension C was prepared by ultrasonic treatment for 5 minutes; silicon powder, carbon black, PVB, acetone, n-Butylamine was mixed at a mass ratio of 30:10:15:100:1 to prepare a slurry, and a stable suspension D was prepared by ultrasonic treatment for 5 minutes. The average particle size of the silicon powder used above is 1 μm, and the average pa...

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 sizeaaaaaaaaaa
porosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for making gradient silicon carbide coating by electrophoresis codeposition, which includes the following steps: by ultrasonic processing, suspending liquid A is prepared by silica powder, carbon soot, caking agent polyvinyl butyral, acetone and additive n-butylamine which are mixed according to the mass proportion of 2-16:20:15:100:1; by ultrasonic processing, suspending liquid B is prepared by silica powder, carbon soot, polyvinyl butyral, acetone and n-butylamine which are mixed according to the mass proportion of 16-30:20:15:100:1; by ultrasonic processing, suspending liquid C is prepared by silica powder, carbon soot, polyvinyl butyral, acetone and n-butylamine which are mixed according to the mass proportion of 15-40:10:15:100:1; by ultrasonic processing, suspending liquid D is prepared by silica powder, carbon soot, polyvinyl butyral, acetone and n-butylamine which are mixed according to the mass proportion of 40-70:10:15:100:1; with graphite material as the anode, under a constant potential mode the suspending liquids above are deposited, dried, heated to be between 1200 DEG C and 1600 DGE C, and preserved at the temperature for 20 to 60 minutes. The invention has the advantages of simple process, good thermal-shock resistance and oxidation resistance, controllable coating thickness and uniform coating.

Description

technical field [0001] The invention relates to a carbon-graphite material surface treatment, in particular to a method for preparing a gradient silicon carbide coating by electrophoretic co-deposition. Background technique [0002] In recent years, with the rapid development of high-tech fields such as aerospace and nuclear energy, graphite materials that still have high mechanical strength at 2000 ° C have become one of the hot spots that people pay attention to. However, carbon-graphite materials react with oxidizing gases above 450 °C leading to performance degradation. Anti-oxidation coating is considered to be an effective way to solve its high temperature protection. However, due to the difference in thermal expansion coefficient between the coating and the carbon matrix material, there is a large thermal stress in the coating, which leads to the weak combination of the coating and the substrate and the existence of cracks, which makes the oxidation resistance of the...

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 Applications(China)
IPC IPC(8): C25D15/00
Inventor 史景利赵文涛郭全贵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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