Preparation of carbon/carbon mould for hot-pressed sintering furnace

A hot-press sintering furnace and mold technology, which is applied in the field of hot-press sintering furnace molds, can solve the problems of isostatic graphite source and quantity instability, isostatic graphite is difficult to purchase, and service life is low, so as to achieve effective expansion The effect of using space, shortening the production cycle, and improving production efficiency

Inactive Publication Date: 2010-06-23
王占双
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, isostatic graphite is mostly used as the mold in the hot-press sintering furnace. The disadvantages are: 1. The source and quantity of isostatic graphite are unstable; 2. T

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example one:

[0014] 1. Using 6K carbon fiber as the reinforcing material, the preform is prepared by the weaving process;

[0015] 2. Put the preform on the graphite mold for chemical vapor deposition, the propylene flow rate is 3.0m 3 / h, deposition temperature 1100℃, deposition time 190 hours;

[0016] 3. Vacuum and pressure impregnation curing treatment: using furfurone resin as the impregnant, first preheat the furfurone resin, the preheating temperature is 55℃, and put the preform in step 1 into the impregnation tank, vacuum and preheat Heat, and then suck the resin into the impregnation tank, keep the pressure at 2.0MPa for 6 hours, fill the tank with nitrogen after the pressure is released, the pressure is 0.2MPa, return the impregnating liquid, and then proceed to curing operation, curing temperature 220 ℃ , Curing time 8 hours;

[0017] 4. Carbonization treatment: Put the solidified preform into a carbonization furnace, and carry out carbonization treatment under th...

Example Embodiment

[0021] Embodiment two:

[0022] 1. Use 12K carbon fiber as reinforcement material, and use weaving process to prepare preform;

[0023] 2. Put the preform on the graphite mold for chemical vapor deposition, the propylene flow rate is 2.0m 3 / h, deposition temperature is 1000℃, deposition time is 140 hours;

[0024] 3. Vacuum and pressure impregnation treatment: use asphalt as the impregnant, first melt the asphalt, heating temperature is 200 ℃, put the preform of step 1 into the impregnation tank, vacuum, preheat, and then put it into the impregnation tank Inhale the bitumen and keep the pressure at 2.5MPa for 6 hours. After releasing the pressure, fill the tank with nitrogen at a pressure of 0.3MPa and return the impregnating liquid. The product will be released when the furnace temperature drops below 150°C;

[0025] 4. Carbonization treatment: Put the bitumen-impregnated product into the carbonization furnace, and carry out carbonization treatment under the protection of high-purit...

Example Embodiment

[0029] Embodiment three:

[0030] 1. Using 6K carbon fiber as reinforcement material, the preform is prepared by acupuncture process;

[0031] 2. Put the preform on the graphite mold for chemical vapor deposition, the propylene flow rate is 2.5m 3 / h, deposition temperature is 1000℃, deposition time is 230 hours;

[0032] 3. Vacuum and pressure impregnation treatment: use asphalt as impregnant, first melt the asphalt, heating temperature is 200℃, and put the deposited product in step 1 into the impregnation tank, vacuum, preheat, and then impregnate Inhale bitumen into the tank, keep the pressure at 2.0MPa for 6 hours, fill the tank with nitrogen after releasing the pressure, the pressure is 0.3MPa, return the impregnation liquid, and the product will be released when the furnace temperature drops below 150℃;

[0033] 4. Carbonization treatment: Put the impregnated product into a carbonization furnace, and carry out carbonization treatment under the protection of high-purity nitrogen....

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PUM

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Abstract

The invention discloses the preparation of a carbon/carbon mould for a hot-pressed sintering furnace, wherein the material of the mould is selected from carbon/carbon composite material and is prepared by steps as follows: 1, producing preform; 2, chemically vapor-depositing; 3, impregnating asphalt or resin to pressurize, impregnating and curing: 4, carbonizing; 5, repeating operation steps 3 and 4; and 6, processing at high temperature. The mould prepared in the invention has high intensity, long service life, light weight, energy conservation and high cost performance, therefore the carbon/carbon mould is suitable for high-temperature and high-pressure environment.

Description

technical field [0001] The invention relates to the field of molds for hot-pressing sintering furnaces, in particular to the preparation of a carbon / carbon mold for hot-pressing sintering furnaces. Background technique [0002] Superhard materials such as boron nitride and titanium nitride are widely used in the manufacture of evaporation boats for vacuum evaporation, screw reinforcement and other fields. Now the hot pressing sintering technology is widely used, that is, the method of high temperature and high pressure to manufacture evaporation boats. The working temperature is generally above 2000 ° C, and the pressure of the pressure head is generally 15-30 MPa. At present, isostatic graphite is mostly used as the mold in the hot-press sintering furnace. The disadvantages are: 1. The source and quantity of isostatic graphite are unstable; 2. The price is high; 3. The service life is low. Dozens of furnaces are used; 4. It is difficult to purchase isostatic graphite with ...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/622
Inventor 王占双
Owner 王占双
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