| Iridium crucible has excellent properties, such as excellent high temperature mechanical property, durability, temperature field uniformity, as well as oxidation resistance, thermal shock resistance, and so on. The large diameter iridium crucible was successfully fabricated by high frequency smelting, hot casting and hot processing. The iridium prepared crucible has excellent properties, such as fine crystal grain, homogeneity of structure and dense, good processing performance. And it significantly improved high temperature properties, thermal stability and long life times. The microstructure and Vickers hardness of iridium samples treated at different temperature were analyzed. The results show that the appropriate annealing temperature could reduce the hardness and improve plastic deformation and processing performance. The suitable temperature parameter to fabricate the large diameter iridium crucible is 1300~1500℃, and the pass deformation is 10%~15%. |
