首页|Interaction mechanism between BaZrO3/Y2O3 refractory and Ti2Ni alloy melts
Interaction mechanism between BaZrO3/Y2O3 refractory and Ti2Ni alloy melts
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The titanium alloys with highly chemical activity require stable crucible refractories that can withstand the erosion of alloy melts.The phase composition and microstructure are crucial factors that affect the stability of the refractory crucible.The effect of Y2O3 on the composition and micro structure of BaZrO3 crucible was systematically investigated,and the improved mechanism of the stability of BaZrO3/Y2O3 crucible was clarified in comparison with the BaZrO3 crucible.The results showed that the erosion layer thickness of the BaZrO3/Y2O3 crucible was only 63 μm,which was far less than that in the BaZrO3 crucible(485 μm),and the erosion layer in the BaZrO3/Y2O3 crucible also exhibited a higher density than that in the BaZrO3 crucible.During the sintering,Y2O3 could improve the densification of the BaZrO3 crucible due to the solid solution effect between Y2O3 and ZrO2,which also caused the evaporation of BaO,resulting in the generation of a Y2O3(ZrO2)film on the surface of the crucible.Furthermore,the Y2O3(ZrO2)had higher thermodynamic stability than Y2O3,confirming that the BaZrO3/Y2O3 crucible with high density exhibited a superior erosion resistance to titanium alloys.This dual-phase structure provides a strategy to design a long-life and stable refractory for melting titanium alloys.
Xiao Hou、Guang-yao Chen、Jian Liu、Ming-rui Lv、Fei-hai Yu、Qi-sheng Feng、Rong-bin Li、Xiong-gang Lu、Chong-he Li
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State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferromeallurgy and School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China
Shanghai Special Casting Engineering Technology Research Center,Shanghai 201605,China
Zhejiang Institute of Advanced Materials,Shanghai University,Jiashan 314100,Zhejiang,China
School of Materials Science and Engineering,Shanghai DianJi University,Shanghai 201306,China
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National Natural Science Foundation of ChinaScience and Technology Innovation Project of Shanghai Lingang New Area
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