Self-sintering tantalum / charcoal carbide composite material preparation method
A carbon composite material and self-sintering technology, which is applied in the field of preparation of tantalum carbide/carbon composite materials, can solve the problems of large fluctuations in product quality, difficulty in uniform dispersion, large differences, etc., and achieve stable product quality, simple preparation process, low cost effect
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Embodiment 1
[0014] The charring residue is 80wt%, the volatile matter is 14.0wt%, and the pitch containing tantalum 2.0wt% is used as the self-sintering raw material (this raw material is made of coal tar pitch with a softening point of 68° C., and tantalum chloride in a ratio of 100:4, It was prepared by reacting at 350°C for 8 hours. For the specific method, please refer to the patent "Preparation method of a carbon-based composite material precursor containing tantalum", application number: 200410064579.4). After grinding the asphalt to a particle size d≤100μm, it is molded Compress molding at room temperature at 50 MPa on a molding machine to obtain green body material. Under the protection of an inert gas, the temperature was raised to 1200° C. at a rate of 10° C. / hour, and kept at 1200° C. for 2 hours, thereby producing a primary molded product. Thereafter, the product is placed in a graphitization furnace, and under the protection of argon, the temperature is raised to 2400 ° C at ...
Embodiment 2
[0016] The charring residue is 93wt%, the volatile matter is 9.0wt%, and the pitch containing tantalum 5.35wt% is used as the self-sintering raw material (this raw material is made of coal tar pitch and tantalum chloride with a softening point of 68° C. in a ratio of 100:10 in Prepared by reacting at 400°C for 6 hours, the specific method is similar to the method in Example 1). After the asphalt is ground to a particle size d≤10 μm, it is press-molded on a compression molding machine at room temperature at 70 MPa to obtain a green body material. Then, under the protection of an inert gas, the temperature was raised to 1300° C. at a rate of 12° C. / hour, and kept at 1300° C. for 1 hour, thereby producing a primary molded product. Thereafter, the product is placed in a graphitization furnace, and under the protection of argon, the temperature is raised to 2500 ° C at a rate of 150 ° C / hour, and the temperature is kept at 2500 ° C for 1 hour to obtain the target product. The de...
Embodiment 3
[0018] The charring residue is 85wt%, the volatile matter is 12wt%, and the pitch containing tantalum 8.48wt% is used as the self-sintering raw material (this raw material is made of coal tar pitch with a softening point of 68° C., and tantalum chloride in a ratio of 100:16 in 450 ° C for 4 hours, the specific method is similar to the method in Example 1), after grinding the pitch to a particle size d≤100 μm, press molding at 90 MPa at room temperature on a compression molding machine to obtain a green body material. Then, under the protection of an inert gas, the temperature was raised to 1200° C. at a rate of 15° C. / hour, and kept at 1200° C. for 2 hours, thereby producing a primary molded product. Thereafter, the product is placed in a graphitization furnace, and under the protection of argon, the temperature is raised to 2600 ° C at a rate of 200 ° C / hour, and the temperature is kept at 2600 ° C for 2 hours to obtain the target product. The density of this material is 1....
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