A kind of MO nanoparticle reinforced CoCRNI medium entropy alloy composite material and preparation method thereof
A nanoparticle and composite material technology, applied in the field of composite material preparation, can solve problems such as difficult to avoid oxidation or contamination of powder, and achieve good fine-grain strengthening effect, excellent mechanical properties, tensile strength and hardness.
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Embodiment 1
[0036] The present invention provides a kind of preparation method of CoCrNi medium entropy alloy composite material reinforced by Mo nanoparticles, comprising the following steps:
[0037] (1) Weigh 1.19g of ammonium tetramolybdate powder and dissolve it in 40ml of deionized water, heat and stir at 60°C until completely dissolved to obtain ammonium tetramolybdate solution;
[0038] (2) Add 63.81g of gas-atomized CoCrNi medium-entropy alloy powder into the ammonium tetramolybdate solution, and evaporate the water in the beaker while stirring at an oil bath temperature of 120°C, until the powder in the beaker is completely stirred with a glass rod until it moves, and then put it into a vacuum drying oven to dry at 60°C for 24 hours to obtain a mixed powder;
[0039] (3) Pass the mixed powder through a 80-mesh mesh sieve, and spread the sieved powder into a graphite crucible, and calcinate the powder in an argon atmosphere at a temperature of 500°C for 30 minutes to obtain a cal...
Embodiment 2
[0043] The present invention provides a kind of preparation method of CoCrNi medium entropy alloy composite material reinforced by Mo nanoparticles, comprising the following steps:
[0044] (1) Weigh 3.57g of ammonium tetramolybdate powder and dissolve it in 40ml of deionized water, heat and stir at 60°C until completely dissolved to obtain ammonium tetramolybdate solution;
[0045](2) Add 61.43g of gas-atomized CoCrNi medium-entropy alloy powder into the ammonium tetramolybdate solution, and evaporate the water in the beaker while stirring at an oil bath temperature of 120°C, until the powder in the beaker is completely stirred with a glass rod until it moves, and then put it into a vacuum drying oven to dry at 60°C for 24 hours to obtain a mixed powder;
[0046] (3) Pass the mixed powder through a 80-mesh mesh sieve, and spread the sieved powder into a graphite crucible, and calcinate the powder in an argon atmosphere at a temperature of 500°C for 30 minutes to obtain a calc...
Embodiment 3
[0050] The present invention provides a kind of preparation method of CoCrNi medium entropy alloy composite material reinforced by Mo nanoparticles, comprising the following steps:
[0051] (1) Weigh 5.97g of ammonium tetramolybdate powder and dissolve it in 40ml of deionized water, heat and stir at 60°C until completely dissolved to obtain ammonium tetramolybdate solution;
[0052] (2) Add 59.03g of gas-atomized CoCrNi medium-entropy alloy powder into the ammonium tetramolybdate solution, and evaporate the water in the beaker while stirring at an oil bath temperature of 120°C, until the powder in the beaker is completely stirred with a glass rod until it moves, and then put it into a vacuum drying oven to dry at 60°C for 24 hours to obtain a mixed powder;
[0053] (3) Pass the mixed powder through a 80-mesh mesh sieve, and spread the sieved powder into a graphite crucible, and calcinate the powder in an argon atmosphere at a temperature of 500°C for 30 minutes to obtain a cal...
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