Preparation method of SiC-ZrC segmented ceramic matrix composite spray pipe
A composite material and ceramic-based technology, which is applied in the field of preparation of ceramic-based composite material nozzles, can solve the problems of lack of high-temperature ablation resistance, reduction of strength and other mechanical properties, and structural weakening, etc., to achieve short preparation cycle, Guaranteed strength and low cost effect
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Embodiment 1
[0016] (1) A two-dimensional carbon fiber prefabricated body is prepared by laminating plain weave carbon cloth;
[0017] (2) CVI is used to deposit pyrolytic C on the carbon fiber preform, and the porous C / C preform is made by high-temperature graphitization treatment;
[0018] (3) Put the porous C / C prefabricated body into anhydrous ethanol for ultrasonic vibration cleaning twice, and dry it in a blast drying oven at 100°C for 3 hours until the quality remains unchanged;
[0019] (4) Put the dried porous C / C preform into the graphite crucible;
[0020] (5) Put Si on the surface of the straight section and skirt of the porous C / C preform, embed it with SiC powder, put it into a tube furnace, and heat up to 1500 °C at a heating rate of 8 °C / min. ℃, keep warm for 2 hours and then cool with the furnace;
[0021] (6) Put Zr on the surface of the middle throat of the porous C / C preform, put it into the tube furnace, the temperature rise rate of the tube furnace is 8°C / min, heat ...
Embodiment 2
[0024] (1) A two-dimensional carbon fiber prefabricated body is prepared by laminating plain weave carbon cloth;
[0025] (2) CVI is used to deposit pyrolytic C on the carbon fiber preform, and the porous C / C preform is made by high-temperature graphitization treatment;
[0026] (3) Put the porous C / C prefabricated body into absolute ethanol for ultrasonic vibration cleaning for 3 times, and dry it in a blast drying oven at 120°C for 4 hours until the quality remains unchanged;
[0027] (4) Put the dried porous C / C preform into the graphite crucible;
[0028] (5) Put Si on the surface of the straight section and the skirt of the porous C / C preform, embed it with SiC powder, put it into a tube furnace, and heat up to 1600 °C at a heating rate of 10 °C / min. ℃, keep warm for 3 hours and then cool with the furnace;
[0029] (6) Put Zr on the surface of the middle throat of the porous C / C prefabricated body, put it into the tube furnace, the temperature rise rate of the tube furn...
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