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Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
Preparation of Sr2CeZrO6 Refractory and Its Interaction with TiAl Alloy
Fuli Bian1, Zheyu Cai2, Jian Liu2
1Fire Research Institute of Shanghai of MEM, Shanghai 200032, China.
None:
Vacuum induction melting in a refractory crucible is an economical method to produce TiAl-based alloys, aiming to reduce the preparation cost. In this paper, a Sr2CeZrO6 refractory was synthesized by a solid-state reaction method using SrCO3, CeO2 and ZrO2 as raw materials, and its interaction with TiAl alloy melt was investigated. The results showed that a single-phase Sr2CeZrO6 refractory could be fabricated at 1400 °C for 12 h, and its space group was Pnma with a = 5.9742(3) Å, b = 8.3910(5) Å and c = 5.9069(5) Å. An interaction layer with a 40μm thickness and dense structure could be observed in Sr2CeZrO6 crucible after melting TiAl alloy. Additionally, the interaction mechanism showed that the Sr2CeZrO6 refractory dissolved in the alloy melt, resulting in the generation of Sr3Zr2O7, SrAl2O4 and CeO2-x, which attached to the surface of the crucible.
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