Unlock instant, AI-driven research and patent intelligence for your innovation.

Carbon fiber toughened silicon carbide composite material plate and its preparation method and application

A composite material plate, tough silicon carbide technology, applied in the direction of brakes, railway braking systems, transportation and packaging, etc. where the braking element interacts with the track, to achieve the effects of high strength, improved mechanical properties, and improved bonding force

Active Publication Date: 2017-10-24
TONGJI UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the reports on materials for maglev train skids are about high-speed maglev train skids, and the key component material is carbon fiber composite material plate. There are basically no reports on materials for low- and medium-speed maglev train skids.

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

[0031] The carbon fiber adopts T700-12K continuous carbon fiber and PAN fiber produced by Toray Corporation of Japan. First, the surface of the carbon fiber is degummed and activated: ultrasonic treatment in deionized water at 60°C for 1.5h; soaking in concentrated nitric acid at 60°C for 1h; and Ultrasonic treatment with 60% concentrated nitric acid (chemically pure) at 60°C for 1.5h to remove the colloid and organic binder on the surface of the fiber. After the treatment, the carbon fiber was cleaned to neutral, and then dried under vacuum at 80°C until the quality was constant.

[0032] Perform 3D weaving on the T700-12K continuous carbon fiber after surface treatment, introduce Z-direction fiber, and weave it into a fiber braided block with a thickness of 20mm; chop the PAN fiber into short carbon fibers with a length of 3mm; put the 3D carbon fiber braided body into 1000 ℃ in the deposition furnace for 2h, after 2h, with 1m 3 The speed of / h is passed into propane for vap...

Embodiment 2

[0035] The carbon fiber adopts T700-12K continuous fiber and PAN fiber produced by Toray Corporation of Japan. First, the carbon fiber is subjected to surface degumming and activation treatment: ultrasonic treatment in 60°C deionized water for 1.5h; soaking in concentrated nitric acid at 60°C for 1h; and Ultrasonic treatment with 60% concentrated nitric acid (chemically pure) at 60°C for 1.5h to remove the colloid and organic binder on the surface of the fiber. After the treatment, the carbon fiber was cleaned to neutral, and then dried under vacuum at 80°C until the quality was constant.

[0036] Perform 3D weaving on the T700-12K continuous carbon fiber after surface treatment, introduce Z-direction fiber, and weave it into a fiber braided block with a thickness of 20mm; chop the PAN fiber into short carbon fibers with a length of 3mm; put the 3D carbon fiber braided body into 1050 ℃ in the deposition furnace for 2.5h, after 2.5h, with 1.25m 3 The speed of / h is passed into ...

Embodiment 3

[0039] The carbon fiber adopts T700-12K continuous fiber and PAN fiber produced by Toray Corporation of Japan. First, the carbon fiber is subjected to surface degumming and activation treatment: ultrasonic treatment in 60°C deionized water for 1.5h; soaking in concentrated nitric acid at 60°C for 1h; and Ultrasonic treatment with 60% concentrated nitric acid (chemically pure) at 60°C for 1.5h to remove the colloid and organic binder on the surface of the fiber. After the treatment, the carbon fiber was cleaned to neutral, and then dried under vacuum at 80°C until the quality was constant.

[0040] Perform 3D weaving on the T700-12K continuous carbon fiber after surface treatment, introduce Z-direction fiber, and weave it into a fiber braided block with a thickness of 20mm; chop the PAN fiber into short carbon fibers with a length of 3mm; put the 3D carbon fiber braided body into 1100 ℃ in the deposition furnace for 3 hours, after 3 hours, with 1.5m 3 The speed of / h is passed ...

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
compressive strengthaaaaaaaaaa
shear strengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a carbon fiber toughened silicon carbide composite material plate and a preparation method and an application thereof, wherein the carbon fiber toughened silicon carbide composite material plate is prepared by the steps of activated carbon fiber surface degumming and activating, 3D fiber weaving, surface pyrolysis and carbon deposition, dipping colloid preparation, dipping and cracking, reaction sintering and the like. Compared with the prior art, long carbon fibers are subjected to 3D weaving, Z-direction fibers are introduced to overcome the disadvantage of low interlayer performance of a 2D composite material, and the mechanical properties in the thickness direction are increased; pyrolytic carbon formed on the carbon fiber surface by vapor deposition is used as a composite material interface, the pyrolytic carbon interface layer is used for transferring the stress of the whole material and other information and plays roles of 'bridge' and 'linkage'; short carbon fibers are added in a dipping colloid solution, so that the binding force of the composite material interface is increased, and the strength of the composite material is higher.

Description

technical field [0001] The invention relates to carbon fiber composite materials, in particular to a carbon fiber toughened silicon carbide composite material plate and its preparation method and application. Background technique [0002] As a new type of transportation system, the maglev train has attracted attention from various countries around the world due to its high speed and convenience. However, considering cost, transportation capacity, energy consumption, etc., medium and low-speed maglev trains are the best choice for urban transportation. The maglev train is different from the traditional rail train, it levitates, guides and drives the train through magnetic force, so when running, it produces little noise, little vibration and good comfort. As the cost of urban rail transit routes increases gradually, the advantages of medium and low-speed maglev trains are gradually emerging. [0003] The maglev train is driven by magnetic force, so there is no traditional w...

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): C04B35/80C04B35/565C04B35/622B61H7/04
Inventor 何国球刘晓山佘萌樊康乐沈月田丹丹吕世泉林国斌任敬东高定刚
Owner TONGJI UNIV