| Autor: |
SAMOKHIN, A.V., ALEKSEEV, N.V., DOROFEEV, A.A., FADEEV, A.A., SINAYSKIY, M.A., ZAVERTIAEV, I.D., GRIGORIEV, Y.V. |
| Zdroj: |
Transactions of Nonferrous Metals Society of China; February 2024, Vol. 34 Issue: 2 p592-603, 12p |
| Abstrakt: |
The possibility to obtain composite micropowders of the W−Cu system with spherical particles having sub-microscale/nanoscale internal structure was confirmed and studied using the complex multistage approach. Composite W−Cu nanoparticles with core–shell structure (W cores and Cu shells) were produced in plasmochemical synthesis in the first stage. Further spray-drying of the aqueous suspension of the W−Cu nanopowder with sucrose enabled the formation of 25−63 μm microgranules with a yield of 50%. The last step was the treatment of the nanopowder microgranules by a thermal plasma jet, which ensured the production of dense spherical W−Cu particles. The final powder had a spheroidization degree of 90%−95%, a bulk density of up to 8.1 g/cm3and a flowability of 12 s/50 g. The contents of impurities in the resulting spherical micropowder were 0.7 wt.% O, 0.02−0.2 wt.% C and 0.03−0.05 wt.% H. |
| Databáze: |
Supplemental Index |
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