Method for coating chromium carbide on diamond micro powder surface
A diamond micropowder and diamond technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of difficult settlement and separation, expensive equipment, high production cost, etc., and achieve the effect of reducing the generation temperature and high plating efficiency
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Embodiment 1
[0023] a. Put 2g of M4 / 8 diamond micropowder into 50ml of 30% sodium hydroxide and cook for 20 minutes, then wash it, then add it to 50ml of 30% nitric acid solution, cook for 30 minutes, wash it, put 50ml of mass fraction is 25% chromic acid washing solution soaked for 20 minutes and then washed;
[0024] b. Add 2g of ammonium dichromate and 0.5g of fluorite to 50ml of water and stir to dissolve. After obtaining the solution, add the diamond powder treated in step a, stir evenly and put it in an oven at 220°C for 2 hours to obtain the precursor powder;
[0025] c. Place the precursor powder obtained in step b in a corundum crucible, put the corundum crucible with the precursor powder into a high-temperature microwave oven, and replace the cavity of the high-temperature microwave oven with argon to fill it with argon, and then the flow rate is about 0.7 Under the flowing argon atmosphere of L / min, heat to 800°C and hold for 60 minutes, then cool to room temperature with the fu...
Embodiment 2
[0028] a. Put 4g of M5 / 10 diamond micropowder into 100ml of 30% sodium hydroxide and cook for 20 minutes, then add it to 100ml of 30% nitric acid solution and cook for 30 minutes, then put it in 50ml of mass fraction is 25% chromic acid washing solution soaked for 20 minutes and then washed;
[0029] b. Add 6g of ammonium dichromate, 2g of fluorite and 8g of sodium chloride into 100ml of water and stir to dissolve. After obtaining the solution, add the diamond powder treated in step a. Stir evenly and put it in an oven at 200°C for 3 hours to obtain a precursor powder ;
[0030] c. Place the precursor powder obtained in step b in a corundum crucible, put the corundum crucible with the precursor powder into a high-temperature microwave oven, and replace the cavity of the high-temperature microwave oven with argon to fill it with argon, and then the flow rate is about 0.7 Under the flowing argon atmosphere of L / min, heat to 850°C and hold for 60 minutes, then cool to room tempe...
Embodiment 3
[0033] a. Put 4g of M5 / 10 diamond micropowder into 100ml of 30% sodium hydroxide and cook for 20 minutes, then add it to 100ml of 30% nitric acid solution and cook for 30 minutes, then put it in 50ml of mass fraction is 25% chromic acid washing solution soaked for 20 minutes and then washed;
[0034] b. Add 6g of ammonium dichromate into 100ml of water and stir to dissolve. After obtaining the solution, add the diamond micropowder treated in step a, stir evenly, put it in an oven and keep it warm at 200°C for 2.5h to obtain the precursor powder;
[0035] c. Place the precursor powder obtained in step b in a corundum crucible, put the corundum crucible with the precursor powder into a high-temperature microwave oven, and replace the cavity of the high-temperature microwave oven with argon to fill it with argon, and then the flow rate is about 0.7 Under the flowing argon atmosphere of L / min, heat to 800°C and hold for 60 minutes, then cool to room temperature with the furnace; ...
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