Preparation method of in-situ synthesized dispersively distributed carbide whisker preform
A technology of dispersive distribution and in-situ self-generation, applied in the field of whiskers, can solve the problems of difficulty in dispersion of powder whiskers, limited introduction amount, etc., and achieve the effects of being conducive to large-scale production, low cost, and uniform growth
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[0028] The present invention is a method for preparing an in-situ self-generated diffusely distributed carbide whisker prefabricated body, the steps are as follows:
[0029] Step 1) After mixing absolute ethanol and phenolic resin, stir with a magnetic stirrer until completely dissolved to obtain A solution;
[0030] In step 1), the mass ratio of absolute ethanol to phenolic resin is 10-15:10.
[0031] Step 2) adding oxide ceramic powder into solution A, and stirring evenly with a magnetic stirrer to obtain solution B;
[0032] In step 2), the amount of oxide ceramic powder added is 30%-120% of the mass of solution A, and the oxide ceramic powder is titanium dioxide, hafnium dioxide, zirconium dioxide or silicon dioxide.
[0033] Step 3) adding hexahydrate, nickel nitrate and chloride to the B solution, stirring evenly with a magnetic stirrer to obtain the C solution;
[0034] In step 3), the molar ratio of hexahydrate, nickel nitrate and chloride is 1:10, the amount of hexa...
Embodiment 1
[0043] A method for preparing an in-situ self-generated and dispersed carbide whisker preform, specifically as follows:
[0044]After mixing 23.7g of absolute ethanol and 18g of phenolic resin, stir with a magnetic stirrer until completely dissolved to obtain A solution. Add 17.1 g of titanium dioxide into solution A, and stir evenly with a magnetic stirrer to obtain solution B. Add 3.0 g of hexahydrate, nickel nitrate and 7.6 g of potassium chloride to solution B, and stir evenly with a magnetic stirrer to obtain solution C. Pour the C solution into the mold, put it into a blast drying oven and dry it at 80°C for 12 hours, then at 120°C for 3 hours, then at 150°C for 1 hour, and finally at 180°C for 3 hours to obtain a block precursor. Put the cured bulk precursor into the corundum tube of the tube furnace, and pass through argon gas for protection. Throughout the process, keep the pressure steady. Raise the temperature to 560°C at a heating rate of 5°C / min and keep it war...
Embodiment 2
[0046] A method for preparing an in-situ self-generated and dispersed carbide whisker preform, specifically as follows:
[0047] (increase the content of hexahydrate and nickel nitrate and Repone K, all the other processes are exactly the same as embodiment 1)
[0048] After mixing 23.7g of absolute ethanol and 18g of phenolic resin, stir with a magnetic stirrer until completely dissolved to obtain A solution. Add 17.1 g of titanium dioxide into solution A, and stir evenly with a magnetic stirrer to obtain solution B. Add 4.9g of hexahydrate, nickel nitrate and 12.7g of potassium chloride to solution B, and stir evenly with a magnetic stirrer to obtain solution C. Pour the C solution into the mold, put it into a blast drying oven and dry it at 80°C for 12 hours, then dry it at 120°C for 3 hours, then dry it at 150°C for 1 hour, and finally dry it at 180°C for 3 hours to obtain a block precursor . Put the cured bulk precursor into the corundum tube of the tube furnace, and p...
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