Preparation method of doping rare earth oxide in metal powder for additive manufacturing
A rare earth oxide, metal powder technology, applied in metal processing equipment, additive processing, transportation and packaging, etc., can solve the problem of poor wettability between nanoparticles and metal matrix, poor adhesion between powder particles and matrix powder, and low economic efficiency. and other problems to avoid agglomeration and uneven mixing
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Embodiment 1
[0030] Dissolve 0.034g of yttrium nitrate hexahydrate in 10mL of distilled water, and use mechanical stirring at a speed of 400rpm and ultrasonic treatment with a power of 200W to fully dissolve the powder of yttrium nitrate hexahydrate, then add 2g of spherical tungsten powder particles into the prepared yttrium nitrate solution , and again use 100rpm mechanical stirring and ultrasonic treatment with a power of 100W to completely wet the tungsten powder particles. Put the above-mentioned solid-liquid mixture into a vacuum oven with a set temperature of 85°C and dry for 18 hours to remove excess liquid to obtain a composite powder. The composite powder was calcined in an argon gas flow at 700°C for 2.5h (the heating rate was 5°C / min, and the gas flow rate was 100mL / min), and then cooled to room temperature in an argon atmosphere to obtain a composite oxide powder. After the above-mentioned powder is manually ground for 10 minutes, a composite powder of uniformly dispersed yttr...
Embodiment 2
[0032] Dissolve 0.137g of yttrium nitrate hexahydrate in 10mL of absolute ethanol, and use 400rpm mechanical stirring and ultrasonic treatment with a power of 200W to fully dissolve the yttrium nitrate hexahydrate powder, then add 4g of spherical copper powder to the prepared yttrium nitrate solution , and again use 100rpm mechanical stirring and ultrasonic treatment with a power of 100W to completely wet the copper powder particles. Put the above-mentioned solid-liquid mixture into a vacuum drying oven with a set temperature of 70° C. for 24 h to remove excess liquid to obtain a composite powder. The composite powder was calcined in a nitrogen gas flow at 300°C for 3h (the heating rate was 5°C / min, and the gas flow was 100mL / min), and then cooled to room temperature in an argon atmosphere to obtain a composite oxide powder. The above powder is ball milled for 4 hours at a speed of 250 rad / min to obtain the following: figure 2 The uniformly dispersed yttrium oxide-wrapped sp...
Embodiment 3
[0034] Dissolve 0.357g of yttrium nitrate hexahydrate in 10mL of deionized water, and use mechanical stirring at a speed of 400rpm and ultrasonic treatment with a power of 200W to fully dissolve the powder of yttrium nitrate hexahydrate, then add 2g of spherical tungsten powder particles to the prepared yttrium nitrate solution , and again use 100rpm mechanical stirring and ultrasonic treatment with a power of 100W to completely wet the tungsten powder particles. Put the above-mentioned solid-liquid mixture into a vacuum drying oven with a set temperature of 70° C. for 24 h to remove excess liquid to obtain a composite powder. The composite powder was calcined in an argon gas flow at 400°C for 5h (the heating rate was 5°C / min, and the gas flow rate was 100mL / min), and then cooled to room temperature in an argon atmosphere to obtain a composite oxide powder. The above powder was hand-milled for 15 min to disperse the cohesive body. pass image 3According to the energy spectru...
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