Preparation method of in situ c-sio2 composite coating on the surface of continuous sic fiber

A composite coating, fiber surface technology, applied in the direction of fiber type, fiber treatment, inorganic raw material rayon, etc. and other problems, to achieve the effect of good ability to absorb radar waves, moderate bonding strength, and low preparation temperature
CN107740266BActive Publication Date: 2019-05-17XIAMEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAMEN UNIV
Publication Date
2019-05-17

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Abstract

The invention provides a method for preparing a surface in-situ C-SiO2 composite coating of continuous SiC fibers and relates to continuous SiC fibers. The method comprises the steps: placing SiC fibers in a muffle furnace, carrying out heating in an air atmosphere, and then, carrying out furnace cooling until the temperature is room temperature in the air atmosphere, so as to obtain a degummed SiC fiber sample A; placing the degummed SiC fiber sample A in a porous graphite boat, placing the graphite boat in a heating-up tubular furnace, introducing an inert atmosphere at room temperature, andexhausting air in the tubular furnace; heating the obtained degummed SiC fiber sample A under the protection of an inert atmosphere, then, closing a N2 gas valve, opening a Cl2 gas valve, adjusting chlorine gas flow-rate, carrying out heat preservation, forming the C-SiO2 composite coating on the surface of the SiC fibers in situ through regulating and controlling a process, carrying out heat preservation, then, closing Cl2 gas, and carrying out furnace cooling until the temperature is room temperature under the protection of an inert atmosphere, thereby obtaining the surface in-situ C-SiO2 composite coating of the continuous SiC fibers.
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Description

technical field

[0001] The present invention relates to continuous SiC fiber, especially relates to a kind of in-situ C-SiO on the surface of continuous SiC fiber that can be used for electromagnetic wave absorption 2 Composite coating preparation method. Background technique

[0002] The development of electronic information technology has increased the demand for civilian anti-radiation technology and military stealth technology, and also put forward an urgent demand for microwave-absorbing materials (D.D.L.Chung. Electromagnetic interference shielding effectiveness of carbon materials[J].Carbon.2001,39:279- 285). Absorbing materials can be divided into coating type and structural type according to the molding process. Coated materials have the disadvantages of heavy weight and easy to fall off, while structural absorbing materials can have the advantages of both absorbing and bearing (Mu Wudi. Preparation and performance research of high temperature resistant absorbing ...

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
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