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Preparation Of BaZrO3/Y2O3 Composite Refractory And Its InteractionWith TiAl Alloy
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State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and Engineering,Shanghai University

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    Abstract:

    The composite refractory crucible using the fused BaZrO3 and Y2O3 was fabricated after sintering at 1650℃ for 24h, then induction melting of TiAl alloy was carried out in the crucible. By using the X-ray diffraction, scanning electron microscope combined with the energy disperse spectroscopy, inductively coupled plasma atomic emission pectrometry and O/N analyzer, the phase composition and microstructure for the composite refractory are investigated as well as the interaction between the composite crucible and TiAl alloy melt. Results reveal that the composite crucible is consisted of Y doped BaZrO3 and Y2O3(ZrO2) phases, and the introduce of Y2O3 is help to the improvement of fused BaZrO3 refractory. Dissolution-erosion is the main responsible for the interaction between the refractory and TiAl alloy melt, however, the Al2O3 in the melt reacts with the BaO leading to the generation of reactant BaAl2O4, which attaches to the inner wall of the crucible. The oxygen concentration for the prepared TiAl alloy ingot is about 0.0986wt.%, which is consistent with the calculated value for the TiAl alloy. It is also met criteria for the industrial TiAl alloy ingot, which indicates that the BaZrO3/Y2O3 composite refractory is the candidate for induction melting of TiAl alloys.

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[ZHANG Yin, CHEN Guangyao, XIAO Yubin, FENG Qisheng, LIU Xiaomei, LU Xionggang, LI Chonghe. Preparation Of BaZrO3/Y2O3 Composite Refractory And Its InteractionWith TiAl Alloy[J]. Rare Metal Materials and Engineering,2021,50(3):988~994.]
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History
  • Received:April 16,2020
  • Revised:July 02,2020
  • Adopted:July 20,2020
  • Online: April 02,2021
  • Published: