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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. The price is high; 3. The service life is low. Dozens of furnaces are used; 4. It is difficult to purchase isostatic graphite with a diameter greater than 600mm, and the price is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. 6K carbon fiber is used as reinforcement material, and the prefabricated body is prepared by weaving process;

[0015] 2. Put the prefabricated body on the graphite mold for chemical vapor deposition, the flow rate of propylene is 3.0m 3 / h, the deposition temperature is 1100°C, and the deposition time is 190 hours;

[0016] 3. Vacuum and pressure impregnation and curing treatment: use furfurone resin as the impregnating agent, first preheat the furfurone resin, the preheating temperature is 55°C, put the prefabricated body in step 1 into the impregnation tank, vacuumize, preheat Heat, 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 impregnation liquid, and then perform curing operation, the curing temperature is 220°C , curing time 8 hours;

[0017] 4. Carbonization treatment: Put the cured prefabricated body into a carbonization ...

Embodiment 2

[0022] 1. 12K carbon fiber is used as reinforcement material, and the prefabricated body is prepared by weaving process;

[0023] 2. Put the prefabricated body on the graphite mold for chemical vapor deposition, the flow rate of propylene is 2.0m 3 / h, the deposition temperature is 1000°C, and the deposition time is 140 hours;

[0024] 3. Vacuum and pressure impregnation treatment: use asphalt as the impregnating agent, first melt the asphalt, heat the temperature at 200°C, put the prefabricated body in step 1 into the impregnation tank, vacuumize, preheat, and then put it into the impregnation tank Inhale asphalt, keep the pressure at 2.5MPa for 6 hours, and fill the tank with nitrogen after the pressure is released, the pressure is 0.3MPa, return the impregnating liquid, and the product will come out of the furnace when the furnace temperature drops below 150°C;

[0025] 4. Carbonization treatment: put the asphalt-impregnated product into a carbonization furnace, and carry ...

Embodiment 3

[0030] 1. 6K carbon fiber is used as reinforcement material, and the prefabricated body is prepared by acupuncture process;

[0031] 2. Put the prefabricated body on the graphite mold for chemical vapor deposition, the flow rate of propylene is 2.5m 3 / h, the deposition temperature is 1000°C, and the deposition time is 230 hours;

[0032] 3. Vacuum and pressure impregnation treatment: use asphalt as the impregnating agent, first melt the asphalt, heat the temperature at 200°C, put the product deposited in step 1 into the impregnation tank, vacuumize, preheat, and then impregnate Asphalt is sucked into the tank, and the pressure is kept at 2.0MPa for 6 hours. After the pressure is released, nitrogen is filled into the tank at a pressure of 0.3MPa. The impregnation solution is returned, and the product is released when the furnace temperature drops below 150°C;

[0033] 4. Carbonization treatment: put the impregnated product into a carbonization furnace, and carry out carboniza...

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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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