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A kind of preparation method of bn/carbide coating composite carbon fiber electromagnetic shielding material

An electromagnetic shielding material and composite carbon fiber technology, which is applied in the fields of magnetic field/electric field shielding, coating, metal material coating technology, etc., can solve problems such as difficulty in meeting the use requirements, low electromagnetic parameters, and inability to meet the requirements of electromagnetic shielding materials at high temperatures. , to achieve good electromagnetic shielding performance, good compactness, compactness and good bonding effect

Active Publication Date: 2019-09-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the drawbacks of existing coated carbon fiber materials such as difficulty in meeting the requirements for use at high temperatures, the first purpose of the present invention is to provide a BN / carbide coating that has both excellent mechanical properties and good electromagnetic shielding properties and can be used at high temperatures. The multi-layer composite carbon fiber electromagnetic shielding material solves the problem that the existing carbon fiber used as an electromagnetic shielding material has low electromagnetic parameters and cannot meet the requirements of electromagnetic shielding materials at high temperatures.

Method used

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  • A kind of preparation method of bn/carbide coating composite carbon fiber electromagnetic shielding material
  • A kind of preparation method of bn/carbide coating composite carbon fiber electromagnetic shielding material
  • A kind of preparation method of bn/carbide coating composite carbon fiber electromagnetic shielding material

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Embodiment 1

[0037] A method for preparing a BN / carbide double-coated composite carbon fiber material with electromagnetic shielding function in this embodiment is implemented according to the following steps: 1. Put the carbon fiber in a tube furnace at 720°C for 10 minutes; Put the carbon fiber treated in step 1 into acetone and ultrasonically clean it for 15 minutes; 3. Prepare the BN coating on the surface of the carbon fiber treated in step 2 by radio frequency magnetron sputtering, which is the lower BN layer; 4. Treat the carbon fiber in step 3 The carbon fiber is prepared on the surface of the TiC coating by radio frequency magnetron sputtering, that is, the upper carbide layer, which completes the preparation of the BN / TiC coating on the surface of the carbon fiber; the purity of the BN target in step 3 is 99.999%, vacuum before sputtering The degree is 8.0×10 -4 Pa, RF sputtering power is 1500W, deposition time is 120min, distance between target and fiber is 60mm, argon gas flow ...

Embodiment 2

[0041] A method for preparing a BN / carbide coated composite carbon fiber material with electromagnetic shielding function in this embodiment is implemented according to the following steps: 1. Put the carbon fiber in a tube furnace at a temperature of 750° C. for 10 minutes; 2. Put step 1 The treated carbon fiber is put into acetone and ultrasonically cleaned for 15min; 3. The carbon fiber after step 2 is treated on the surface by radio frequency magnetron sputtering to prepare a BN coating, which is the lower BN layer; 4. The carbon fiber after step 3 is treated in the The surface adopts DC magnetron sputtering method to prepare VC coating, that is, the upper carbide layer, which completes the preparation of BN / VC coating on the carbon fiber surface; wherein the purity of the BN target in step 3 is 99.999%, and the vacuum degree before sputtering is 8.0×10 -4 Pa, the RF sputtering power is 2000W, the deposition time is 90min, the distance between the target and the fiber is 6...

Embodiment 3

[0045] A method for preparing a BN / carbide coated composite carbon fiber material with electromagnetic shielding function in this embodiment is implemented according to the following steps: 1. Put the carbon fiber in a tube furnace at a temperature of 700 ° C for 10 minutes; 2. Step 1 The treated carbon fiber is put into acetone and ultrasonically cleaned for 15min; 3. The carbon fiber treated in step 2 is prepared on the surface by DC magnetron sputtering method to prepare a BN coating, that is, the lower BN layer; 4. The carbon fiber treated in step 3 is placed on the The surface adopts radio frequency magnetron sputtering method to prepare ZrC coating, i.e. the upper carbide layer, which completes the preparation of the carbon fiber surface BN / ZrC coating; wherein the purity of the BN target in step 3 is 99.999%, and the vacuum degree before sputtering is 8.0×10 -4 Pa, the DC sputtering current is 60mA, the deposition time is 40min, the distance between the target and the f...

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Abstract

The invention discloses a composite carbon fiber electromagnetic shielding material with a BN / carbide coating and a preparation method thereof. The electromagnetic shielding material is composed of acarbon fiber matrix and the BN / carbide composite coating on the surface of the carbon fiber matrix, wherein the lower layer of the BN / carbide composite coating is a BN coating, and the upper layer ofthe BN / carbide composite coating is a coating of carbide such as TiC, VC or ZrC. The preparation method comprises the following steps of carrying out high-temperature treatment on a carbon fiber, washing the carbon fiber with acetone, and then taking the carbon fiber as the matrix and sequentially preparing the BN coating and the carbide coating on the surface of the carbon fiber through magnetronsputtering. The prepared electromagnetic shielding material has a good electromagnetic shielding effect in a very wide frequency band range, the electromagnetic parameters of the carbon fiber can beeffectively adjusted, and meanwhile, the composite fiber keeps the excellent performance of the original carbon fiber; the electromagnetic shielding material is provided with comprehensive performanceof high strength, high modulus, corrosion resistance, excellent thermal stability and the like; change of the diameter of the composite carbon fiber is small, the flexibility is good, and the composite carbon fiber can be used for spinning; and the preparation method of the electromagnetic shielding material is simple to operate, low in cost and capable of meeting the requirements of industrial production.

Description

technical field [0001] The invention relates to an electromagnetic shielding material, in particular to a BN / carbide coated composite carbon fiber electromagnetic shielding material and a preparation method thereof, belonging to the field of electromagnetic shielding materials. Background technique [0002] With the rapid development of modern electronic technology, electronic appliances and radio communications are widely used, and the electromagnetic radiation problem is becoming more and more serious. It has become another pollution after noise pollution, air pollution, water pollution and solid waste pollution. Big public nuisance. Electromagnetic waves not only interfere with the normal operation of various electronic devices and affect human health, but also cause information leakage and threaten the country's political, economic and military security. Therefore, exploring efficient electromagnetic shielding materials has become an urgent problem to be solved. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C14/35H05K9/00
Inventor 岳建岭王畅黄小忠杜作娟
Owner CENT SOUTH UNIV
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