Method for quick-speed preparing carbon/carbon composite material using heat gradient chemical gas phase infiltration

A chemical vapor infiltration and composite material technology, which is applied in the field of rapid preparation of composite materials, can solve problems such as difficult interpretation and calculation, atmospheric pressure exceeding positive pressure, danger, etc., and achieve the effects of reducing equipment investment, improving utilization rate, and saving electric energy
CN1766153AInactive Publication Date: 2006-05-03XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2006-05-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method to quick prepare C / C composite material by heat-gradient chemical gas phase permeation, which comprises: using two upper-lower independent graphite heaters on heat-gradient chemical gas phase permeation device to realize boil and gasify the liquid predecessor and provide high-active carbon source for cracking reaction by lower heater; locating the prefabricated body and upper heater on top of predecessor liquid surface by supporting bar and hole-contain supporting board to realize heat the prefabricated body and form heat gradient along its thickness orientation by upper heater; passing long-path convection and diffusion, the gasified carbon source enters the prefabricated body to crack and generate deposition for 4~10h, and obtaining the product with density as 1.6~1.8g / cm3. This invention needs simple devices, has technical parameters easy to regulate, reduces energy greatly, and has wide application.
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Description

technical field

[0001] The invention relates to a rapid preparation of composite materials, in particular to a method for rapid preparation of carbon / carbon (C / C) composite materials by thermal gradient chemical vapor infiltration using liquid precursor gasification as a carbon source. Background technique

[0002] Carbon / carbon (C / C) composite materials have high specific strength, high specific stiffness, high strength at high temperature, good ablation performance, friction performance and good thermal shock resistance, as well as the designability of composite materials. In the aviation field, especially as an aircraft brake material, it has broad application prospects. At present, isothermal chemical vapor infiltration (Chemical vapor infiltration, CVI) is the main method for preparing C / C composites. Although this process has certain advantages, its disadvantages are that the preparation process cycle is too long and the utilization rate of raw...

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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