Preparation method of CSiNB-based multi-element integrated fiber felt material

A fiber felt and carbon fiber felt technology, which is applied in the field of fiber felt material preparation, can solve the problems of high cost, complicated process, and low output

Active Publication Date: 2021-04-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention solves the problems of complex process, low output and high cost of Si-B-C-N se

Method used

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  • Preparation method of CSiNB-based multi-element integrated fiber felt material
  • Preparation method of CSiNB-based multi-element integrated fiber felt material
  • Preparation method of CSiNB-based multi-element integrated fiber felt material

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specific Embodiment approach 1

[0022] Embodiment 1: In this embodiment, a method for preparing a CSiNB-based multi-component integrated fiber felt material is completed according to the following steps:

[0023] 1. Activation treatment of carbon fiber felt:

[0024] Immerse the carbon fiber felt in an aqueous solution of inorganic salt ions, and activate it for 0.5h to 6h at a temperature of 20°C to 80°C to obtain an activated carbon fiber felt;

[0025] The mass percent of the inorganic salt ion aqueous solution is 1% to 10%;

[0026] Second, perfusion boron powder:

[0027] Immerse the activated carbon fiber felt in the boron powder dispersion liquid, and ultrasonically disperse it for 30 minutes to 60 minutes under the condition of ultrasonic power of 35W to 50W, or perform perfusion treatment for 24h to 48h under vacuum conditions to obtain a carbon fiber felt impregnated with boron powder ;

[0028] Described boron powder dispersion liquid is the mixed liquid of boron powder and alcohol, and the vol...

specific Embodiment approach 2

[0036] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the carbon fiber felt described in step one has a unit mass of 200g / m 2 ~800g / m 2 carbon fiber mat; the thickness of the carbon fiber mat described in step 1 is 3 mm to 10 mm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the inorganic salt ion aqueous solution described in step one is sodium chloride aqueous solution, calcium chloride aqueous solution, sodium fluoride aqueous solution and calcium fluoride One or a mixture of several of them in the aqueous solution. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a CSiNB-based multi-element integrated fiber felt material, and relates to a preparation method of a fiber felt material. The invention aims to solve the problems of complex process, low yield and high cost of the SiBCN series ceramic method. The preparation method comprises the following steps: 1, activating the carbon fiber felt; 2, pouring boron powder; and 3, high-temperature sintering reaction. The preparation method is used for preparing the CSiNB-based multi-element integrated fiber felt material.

Description

technical field [0001] The invention relates to a preparation method of a fiber felt material. Background technique [0002] Ceramic fiber materials with high temperature resistance, non-ablation, high reliability and long life are an important class of high-tech new materials, which play an important role in promoting the rapid development of aviation, aerospace, metallurgy, chemical industry, and energy. According to the research on the high temperature resistant material system, it is found that a new type of Si-B-C-N ceramics has extremely high thermal stability. At present, the material system still has no obvious weight loss phenomenon at 1600 ° C or higher temperature. However, the Si-B-C-N series ceramics that have been achieved so far are all prepared based on the cracking method of organic polymers. This method has complicated process, low yield (the yield is only about 30%), and the cost of the organic precursor polyborosilazane is extremely high. Therefore, th...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/58D04H1/08C04B35/65
CPCC04B35/58C04B35/65C04B2235/3418C04B2235/421C04B2235/428C04B2235/46C04B2235/5248C04B2235/6562C04B2235/6567C04B2235/9607D04H1/08
Inventor 王志江兰晓琳
Owner HARBIN INST OF TECH
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