Preparation of Y_2O_3 Doped SrZrO_3 Refractory and Study on Its Interface Reaction with Molten TiNi Alloys

摘要

Y_2O_3 doped SrZrO_3 (SZY) powders were prepared according to a solid-state reaction method, which the raw materials contains SrCO_3, ZrO_2 and doped with 5 mol% Y_2O_3. And then the powders were used to make a green crucible shape by cold isostatic pressing. After that, the crucible was used to melt with TiNi alloy in the vacuum induction furnace with biscuit firing temperature of 900癈, and sintering temperature of 1750癈. The x-ray diffraction analysis(XRD), scanning electron microscope(SEM), and energy dispersive X-ray spectroscopy(EDS) were used to analysis the characterization of the Y_2O_3 doped SrZrO_3 power;;microstructure of the crucible at different holding time under the 1750癈 and the interfacial reaction between the crucible and the TiNi alloy. The results showed that the powders of Y_2O_3 doped SrZrO_3 were synthesized at 1200癈, and there was no obvious reaction layer and elements diffusion between the crucible and TiNi alloy. The ingot is easy to separate from the crucible after smelting.