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

A method for preparing high-performance aluminum-based silicon carbide

A technology of aluminum-based silicon carbide and silicon carbide, applied in metal processing equipment, nanotechnology for materials and surface science, transportation and packaging, etc., can solve problems such as uneven distribution and uneven density distribution of green compacts, and achieve Excellent comprehensive performance, low production cost and high density

Active Publication Date: 2019-12-24
NORTHEASTERN UNIV LIAONING
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the uneven distribution of the aluminum-based silicon carbide powder obtained by mixing, there is a problem of uneven compact density distribution after pressing.

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
  • A method for preparing high-performance aluminum-based silicon carbide
  • A method for preparing high-performance aluminum-based silicon carbide
  • A method for preparing high-performance aluminum-based silicon carbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) 18g of phenolic resin and 1.8g of nickel nitrate were dissolved in 60ml of absolute ethanol and stirred, then added 60ml of tetraethyl orthosilicate; after the above solution was fully mixed, 5g of surfactant sodium lauryl sulfate was added, and then Add 10ml of oxalic acid for hydrolysis, and then add 4mL of methyltetramine to accelerate the gelation. After the gel is formed, it is aged for 22 hours to obtain silicon carbide powder. Put 10g of the prepared silicon carbide powder into a test tube, add 5ml of acetone, and disperse it by ultrasonication for 15 minutes, then add 2ml of coupling agent KH-550 (γ-aminopropyltriethoxysilane), and continue ultrasonication After 40 minutes, reflux in an oil bath at 85°C for 12 hours. The oil bath is made of silicone oil. After sufficient centrifugation, it is washed with acetone, dried and baked at 70°C to obtain surface-modified silicon carbide.

[0036] (2) Measure 300mL of distilled water into a 500mL three-neck flask, he...

Embodiment 2

[0042] When embodiment 2Al and SiC content are different, the impact on compaction density and temperature

[0043] On the basis of Example 1, by controlling Al(C 3 h 7 O) 3 / HNO 3 The precipitation solution and the pH value can be used to obtain core-shell structure composite particles of aluminum nanoshells coated with silicon carbide with core (SiC) shell (Al) size ratios of 5:1, 5:2, and 2:1. During the reaction process, the more precipitation solution, the more Al ions in the solution. When pH3 h 7 O) 3 / HNO 3 The thickness of the shell is controlled by the precipitation solution and the pH value, thereby adjusting the size ratio of the core to the shell.

[0044] Aluminum-based silicon carbide particles with the same mass and particle size of core (SiC) shell (Al) size ratios of 5:1, 4:1, 5:2, and 2:1 were put into the mold, and then pressed at high speed. Press every 80MPa, the pressure range is 0-2000MPa, measure the relative density and the temperature of the ...

Embodiment 3

[0046] Embodiment 3 The impact of pressing speed on green compact density and temperature

[0047] Put the aluminum-based silicon carbide particles with the same mass and the same content and particle size into the mold, wherein the core (SiC) shell (Al) size ratio of the aluminum-based silicon carbide particles is 4:1, which can be prepared according to Example 1, and the hammerhead is controlled The speeds are 10m / s, 20m / s, 30m / s, 40m / s and 50m / s respectively, samples are taken every 100MPa, the pressure range is 0-2000MPa, and the influence of the pressing speed on the pressing process is observed. The result is as Figure 6 shown. It shows that the higher the pressing speed, the greater the temperature rise, but the compact density is relatively low.

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

No PUM Login to View More

Abstract

The invention relates to a method for preparing high-performance aluminum-based silicon carbide. The method is S1, adding a coupling agent to silicon carbide to obtain surface-modified silicon carbide; S2, hydrolyzing aluminum isopropoxide to obtain aluminum sol; S3 , adding the surface-modified silicon carbide obtained in step S1 into Al(C 3 h 7 O) 3 / HNO 3 In the sinking liquid, mix with the aluminum sol obtained in step S2, stir and distill to obtain the core-shell structure composite particle powder of aluminum nanoshell coated silicon carbide; S4, the aluminum nanoshell coated silicon carbide core shell obtained in step S3 The structural composite particle powder is loaded into a mold and pressed at a high speed to obtain a compact of aluminum-based silicon carbide. The green compact manufactured by the invention has the characteristics of high density, uniform density and excellent comprehensive performance; and the production cost is low and the production efficiency is high.

Description

technical field [0001] The invention relates to a method for preparing high-performance aluminum-based silicon carbide, which belongs to the technical field of powder metallurgy forming. Background technique [0002] Aluminum-based silicon carbide, as a lightweight structural composite material, has excellent mechanical and physical properties such as high specific strength, specific modulus, good high temperature performance, wear resistance, fatigue resistance, low density, and good dimensional stability. . In addition, compared with continuous fiber-reinforced composite materials, it has a significant low-cost advantage. The material is isotropic, easy to process, and flexible and diverse in preparation. It can meet the material performance requirements of modern science and technology, especially aerospace, "energy" ocean engineering and transportation technology. Therefore, the preparation of this aluminum-based silicon carbide composite material is very important. ...

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): B22F9/24B22F1/00B22F3/02B82Y30/00
CPCB82Y30/00B22F3/02B22F9/24B22F1/054
Inventor 安希忠王艳东贾倩张光健付海涛杨晓红张浩
Owner NORTHEASTERN UNIV LIAONING
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