A kind of preparation method of oxide/oxide ceramic matrix composite material containing elastic structure interface
A technology of oxide ceramics and elastic structure, which is applied in the field of preparation of oxide/oxide ceramic matrix composite materials, can solve the problems of low compressive strength and insufficient toughness, achieve enhanced strength, ensure effective transmission of layout and load, and improve The effect of fracture toughness
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Embodiment 1
[0033] 1. Prepare a polyvinyl alcohol solution with a concentration of 2wt.%. Under the action of magnetic stirring, evenly mix SiC nanowires with a diameter of 15nm and a length <50μm into the polyvinyl alcohol solution until the SiC nanowires are in the polyvinyl alcohol solution. The concentration in the solution is 5wt.%, and then ball milled for 0.5 hours to obtain an elastic structure interface solution;
[0034] 2. Immerse the oxide fiber cloth in the elastic structure interface solution prepared in step 1 for 0.5 hours, then take it out, layer it in the mold and fix it, cure it in a vacuum furnace at 250°C and pyrolyze it at 600°C, so that A pyrolytic carbon interface containing nanowires is formed on the surface of oxide fibers;
[0035] 3. Repeat step 2 3 times to obtain an oxide fiber prefabricated body containing nanowire pyrolytic carbon with an interface thickness of 150 nm;
[0036] 4. impregnating the oxide fiber preform obtained in step 3 in an alumina sol wi...
Embodiment 2
[0042] 1. Prepare a polyvinyl alcohol solution with a concentration of 5wt.%. Under the action of magnetic stirring, evenly mix SiC nanowires with a diameter of 15nm and a length <50μm into the polyvinyl alcohol solution until the SiC nanowires are in the polyvinyl alcohol solution. The concentration in the solution is 10wt.%, and then ball milled for 1 hour to obtain an elastic structure interface solution;
[0043] 2. Immerse the oxide fiber cloth in the elastic structure interface solution prepared in step 1 for 0.5 hours, then take it out, layer it in the mold and fix it, cure it in a vacuum furnace at 300°C and pyrolyze it at 800°C, so that A pyrolytic carbon interface containing nanowires is formed on the surface of oxide fibers;
[0044] 3. Repeat step 2 for 3 times to obtain an oxide fiber prefabricated body containing nanowire pyrolytic carbon with an interface thickness of 180 nm;
[0045] 4. impregnating the oxide fiber preform obtained in step 3 in an alumina sol ...
Embodiment 3
[0051] 1. Prepare a polyvinyl alcohol solution with a concentration of 10wt.%. Under the action of magnetic stirring, evenly mix SiC nanowires with a diameter of 15nm and a length <50μm into the polyvinyl alcohol solution until the SiC nanowires are in the polyvinyl alcohol solution. The concentration in the solution is 15wt.%, and then ball milled for 1 hour to obtain an elastic structure interface solution;
[0052] 2. Immerse the oxide fiber cloth in the elastic structure interface solution prepared in step 1 for 1 hour, then take it out, layer it in the mold and fix it, cure it in a vacuum furnace at 400°C and pyrolyze it at 1000°C, so that A pyrolytic carbon interface containing nanowires is formed on the surface of oxide fibers;
[0053]3. Repeat step 2 4 times to obtain an oxide fiber preform with a nanowire pyrolytic carbon interface thickness of 200 nm;
[0054] 4. impregnating the oxide fiber preform obtained in step 3 in an alumina sol with a solid content of 25% a...
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