Preparation method of near-eutectic nb-si-mo alloy with lamellar structure orientation arrangement characteristics
A directional arrangement and lamellar technology, which is applied in the field of high temperature structural material preparation, can solve the problems of complex preparation process, affect the stability of material structure, coarse structure, etc., achieve simple preparation process, ensure structure stability, and eliminate component segregation. Effect
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[0035] Preparation method of near-eutectic Nb-18Si-10Mo alloy with lamellar structure orientation
[0036] (1) commercially available pure Nb powder, pure Si powder and pure Mo powder are sieved by a metal sieve to obtain the pure Nb powder with an average particle size of 80 μm, pure Si powder and pure Mo powder;
[0037] (2) According to the composition of the Nb-18Si-10Mo alloy in atomic percentage, the pure Nb powder of 80 μm obtained in the step (1), pure Si powder and pure Mo powder are weighed by an electronic balance, and then planetary Mix in a ball mill for 2 hours without adding any balls during the mixing process to obtain a mixed powder;
[0038] (3) Put the mixed powder obtained in step (2) in the powder feeder of the laser rapid prototyping system, use high-purity argon as the powder feeding airflow, the powder-carrying airflow is: 8L / min, and use argon as the shielding gas , the protective gas flow rate is: 20L / min;
[0039] (4) DZ125 alloy with a size of 300...
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