Three-dimensional network through-hole composite and preparation thereof
A technology of three-dimensional network and composite materials, which is applied in the field of three-dimensional network through-hole composite materials and their preparation, and achieves the effects of low processing temperature, excellent mechanical properties and good thermal conductivity.
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example 1
[0051] step one
[0052] According to the mass ratio, beryllium-containing polycarbosilane:xylene=1:1, mix them uniformly to obtain the precursor impregnation solution. In the polycarbosilane containing beryllium, the mass percentage of beryllium is 0.2%, and its molecular weight is 11000.
[0053] step two
[0054] A structural member with a pore size of 1.5mm and a porosity of 40% was prepared with resin.
[0055] step three
[0056] Combining the resin structure prepared in step 2 with the pretreated (temperature 500°C; time 2h) continuous fiber weave three-dimensional mesh braid, and immerse it in the precursor solution in step 1, put In a vacuum drying oven, heat to 60°C, the vacuum degree is -0.05MPa, and the time is 12h, to obtain the preform;
[0057] step four
[0058] Place the preform prepared in Step 3 in a muffle furnace and heat it to 260° C., and keep it warm for 3 hours to remove the resin skeleton.
[0059] step five
[0060] Put the prefabricated part ...
example 2
[0066] step one
[0067] According to the mass ratio, beryllium-containing polycarbosilane:xylene=1:3, mix them uniformly to obtain the precursor impregnation solution. In the polycarbosilane containing beryllium, the mass percentage of beryllium is 0.5%, and its molecular weight is 10000.
[0068] step two
[0069] A structural member with a pore size of 3mm and a porosity of 50% was prepared with resin.
[0070] step three
[0071] Combining the resin structure prepared in step 2 with the pretreated (temperature 600°C; time 2h) continuous carbon fiber woven three-dimensional mesh braid, and immersing it in the precursor solution in step 1, putting it into In a vacuum drying oven, heat to 60°C, the vacuum degree is -0.09MPa, and the time is 48h to obtain the preform;
[0072] step four
[0073] Place the preform prepared in Step 3 in a muffle furnace and heat it to 330° C., and keep it warm for 6 hours to remove the resin skeleton.
[0074] step five
[0075] Put the p...
example 3
[0081] step one
[0082] According to the mass ratio, beryllium-containing polycarbosilane:xylene=1:2, mix them uniformly to obtain the precursor impregnation solution. In the polycarbosilane containing beryllium, the mass percentage of beryllium is 0.8%, and its molecular weight is 12000.
[0083] step two
[0084] A structural member with a pore size of 2mm and a porosity of 55% was prepared with resin.
[0085] step three
[0086] Combining the resin structure prepared in step 2 with the pretreated (temperature 500°C; time 1h) continuous carbon fiber woven three-dimensional mesh woven piece, and immersing it in the precursor solution in step 1, putting it into In a vacuum drying oven, heat to 60°C, the vacuum degree is -0.07MPa, and the time is 24h to obtain the preform;
[0087] step four
[0088] Place the preform prepared in Step 3 in a muffle furnace and heat it to 300° C., and keep it warm for 4 hours to remove the resin skeleton.
[0089] step five
[0090] Put...
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