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Hydration Damage Mechanism of BaZrO3/Al2O3 Composite Mold and Its Effect on Directionally Solidified TiAl Alloy
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Fuhao XIONG1, Guangyao CHEN1, 2, Baohua DUAN1, Lu MAO1, Xuexian ZHANG1, Xingli ZOU1, Chonghe LI1, 2
Journal of the Chinese Ceramic Society | 2022, 50(3) : 819 - 827
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Journal of the Chinese Ceramic Society | 2022, 50(3): 819-827
• Research Articles •
Hydration Damage Mechanism of BaZrO3/Al2O3 Composite Mold and Its Effect on Directionally Solidified TiAl Alloy
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Fuhao XIONG1, Guangyao CHEN1, 2, Baohua DUAN1, Lu MAO1, Xuexian ZHANG1, Xingli ZOU1, Chonghe LI1, 2
Affiliations
  • 1.State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
  • 2.Shanghai Special Casting Engineering Technology Research Center, Shanghai 201605, China

    • XIONG Fuhao (1994-), Male, Master candidate. E-mail:

About Author:

XIONG Fuhao (1994-), Male, Master candidate. E-mail:

Published: 2022-03-20 doi: 10.14062/j.issn.0454-5648.20210485
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BaZrO3/Al2O3 composite molds were prepared via sintering at 1 600 ℃ for 8 h with BaZrO3 as a surface coating material and Al2O3 as a backup coating material. The phase composition and microstructure of the interfacial bonding layer between the face and back layers before and after hydration were investigated by optical microscopy, X-ray diffraction, and scanning electron microscopy with energy dispersive spectroscopy. The hydration process and damage mechanism of the interfacial bonding layer in the mold were analyzed. The effect of mold damage on the directional solidification of TiAl alloy was also investigated via directional solidification tests. The results show that BaZrO3 and Al2O3 generate BaAl2O4 at BaZrO3/Al2O3 interface during the high-temperature sintering process; and BaAl2O4 generates Ba(AlO(OH)2)2, Ba2Al4(OH)16 and Ba3(Al(OH)6)2 after hydration, leading to the grain volume change to destroy the intergranular bonding force, the generation of cracks in the mold and the failure of the mold. In the directional solidification process, the generated cracks become a channel for melt penetration of TiAl alloy, resulting in a melt leakage from the mold and the appearance of heterogeneous crystals in the directionally solidified TiAl alloy castings.

barium zirconate/alumina composite mold  /  barium aluminate  /  hydration  /  titanium aluminium alloy  /  directional solidification
熊富豪, 陈光耀, 段保华, 毛露, 张学贤, 邹星礼, 李重河. BaZrO3/Al2O3复合模壳水化损毁机理及其对定向凝固TiAl合金的影响. 硅酸盐学报, 2022 , 50 (3) : 819 -827 . DOI: 10.14062/j.issn.0454-5648.20210485
Fuhao XIONG, Guangyao CHEN, Baohua DUAN, Lu MAO, Xuexian ZHANG, Xingli ZOU, Chonghe LI. Hydration Damage Mechanism of BaZrO3/Al2O3 Composite Mold and Its Effect on Directionally Solidified TiAl Alloy[J]. Journal of the Chinese Ceramic Society, 2022 , 50 (3) : 819 -827 . DOI: 10.14062/j.issn.0454-5648.20210485
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Year 2022 volume 50 Issue 3
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Article Info
doi: 10.14062/j.issn.0454-5648.20210485
  • Receive Date：2021-06-15
  • Online Date：2026-10-22
  • Published：2022-03-20
Article Data
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History
  • Received：2021-06-15
  • Revised：2021-09-20
Funding
Affiliations
    1.State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
    2.Shanghai Special Casting Engineering Technology Research Center, Shanghai 201605, China

Corresponding:

CHEN Guangyao (1987-), Male, Ph.D., Lecturer; E-mail:
LI Chonghe (1962-), Male, Ph.D., Professor.
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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