Preparation method of nanometer ceramic bonder type superhard material grinding wheel
A technology of ceramic bond and superhard material, which is used in manufacturing tools, metal processing equipment, grinding/polishing equipment, etc. It can solve the lack of systematic and in-depth research on nano-ceramic bonds, abnormal growth of grains, and difficulty in densification. and other problems, to achieve the effect of slow release stress concentration, simple process and low cost
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Embodiment 1
[0022] Example 1: At room temperature, acrylamide monomer, N,N'-methylenebisacrylamide and deionized water were prepared in a mass ratio of 30:10:60 to prepare a 200ml clear solution, and the mass of the premixed liquid 0.5% of the mixture was added with 1 g of sucrose, and stirred for 1 h to obtain a premix. Add 3g of zirconium oxychloride, 0.72g of aluminum nitrate, 4.4g of sodium chloride, 24g of cubic boron nitride, and 8g of PMMA microspheres to the above premixed solution, and stir for 4 hours to obtain a uniformly dispersed solution. Add 0.05ml of 20wt% tetramethylethylenediamine solution and 0.4ml of 40wt% ammonium persulfate aqueous solution to the solution successively, stir evenly, pour into the mold, and form a gel at a constant temperature of 40°C. Then the wet gel was dried for 3 days under the condition of 40° C. and humidity of 60% rh to obtain a dry gel. The obtained xerogel was heated in a muffle furnace at a rate of 0.3 °C / min to 600 °C for 4 hours, and the...
Embodiment 2
[0023] Example 2: At room temperature, acrylamide monomer, N,N'-methylenebisacrylamide and deionized water were prepared in a mass ratio of 9.5:0.5:90 to prepare 200ml of a clear solution. Add 40g of fructose to 20% of the mixture, and stir for 2 hours to obtain a premix. Add 4g of sodium chloride, 10g of aluminum nitrate, 3g of zirconium oxychloride, 18g of diamond, and 2g of carbon spheres to the above premixed solution, and stir for 3 hours to obtain a uniformly dispersed solution. Add 0.04ml of 20wt% tetramethylethylenediamine solution and 0.6ml of 40wt% ammonium persulfate aqueous solution to the solution in turn, stir evenly, pour into the mold, and form a gel at a constant temperature of 60°C. Then the wet gel was dried for 5 days under the conditions of 80° C. and humidity of 90% rh to obtain a dry gel. The obtained xerogel was heated in a muffle furnace at a rate of 2 °C / min to 300 °C for 0.5 h, continued to rise to 550 °C for 4 h, and then at a rate of 2 °C / min to 8...
Embodiment 3
[0024] Example 3: At room temperature, acrylamide monomer, N,N'-methylenebisacrylamide and deionized water were prepared into a 200ml clear solution at a mass ratio of 15:0.6:84.4. Add 20 g of glucose to 10% of the solution, stir for 1 h to obtain a premix. Add 3g of zirconium oxychloride, 0.72g of aluminum nitrate, 4.4g of potassium chloride, 10g of cubic boron nitride, 14g of diamond, and 8g of PS microspheres to the above premixed solution, and stir for 4 hours to obtain a uniformly dispersed solution. Add 0.1ml of 20wt% tetramethylethylenediamine aqueous solution and 0.2ml of 40wt% ammonium persulfate aqueous solution successively in the solution, pour into the mold after stirring evenly, form a gel at a constant temperature of 40°C, and then wet the gel at 50 ℃, humidity greater than 60% rh for 5 days, the obtained xerogel was raised to 200 ℃ for 3 hours at a heating rate of 0.5 ℃ / min in a muffle furnace, and then raised to 750 ℃ at a heating rate of 5 ℃ / min ℃, keep wa...
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