材料科学技术(英文版)2021，Vol.66Issue(7) ：21-27.

Distribution control and formation mechanism of gas inclusions in directionally solidified Al2O3-Er3Al5O12-ZrO2 ternary eutectic ceramic by laser floating zone melting

Haijun Su Yuan Liu Qun Ren Zhonglin Shen Haifang Liu Di Zhao Guangrao Fan Min Guo Jun Zhang Lin Liu Hengzhi Fu
材料科学技术(英文版)2021，Vol.66Issue(7) ：21-27.
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  • NSTL
  • 维普
  • 万方数据

Distribution control and formation mechanism of gas inclusions in directionally solidified Al2O3-Er3Al5O12-ZrO2 ternary eutectic ceramic by laser floating zone melting

Haijun Su 1Yuan Liu 2Qun Ren 2Zhonglin Shen 2Haifang Liu 1Di Zhao 1Guangrao Fan 2Min Guo 2Jun Zhang 2Lin Liu 2Hengzhi Fu2
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作者信息

  • 1. Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, China;State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China
  • 2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China
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Abstract

Distribution control and formation mechanism of gas inclusions formed in directionally solidified Al2O3-Er3AlsO12-ZrO2 eutectic ceramic rods are explored during laser floating zone melting.In atmospheric environment,highly-dense bubble-free eutectic rods are well fabricated at low solidification rate (＜25 μm/s).Gas inclusions form intermittently when the solidification rate is in the range of 25-50 μm/s,but produce continuously at higher solidification rates (100-200 μm/s).The gas inclusions exhibit an elongated finger-like pattern along the growth direction,which of the maximum value of diameter first increases and then decreases with increasing the solidification rate.Meanwhile,the volume fraction of gas inclusions increased gradually with the solidification rate.Based on the effect of surface tension gradient,heterogeneous nucleation of gas bubbles is evaluated to be the primary formation mechanism of gas inclusions.

Key words

Directional solidification/Gas inclusions/Eutectic oxide/Laser floating zone melting/Formation mechanism

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基金项目

This work was supported financially by the Science,Technology and Innovation Commission of Shenzhen Municipality(JCYJ20180306171121424)

National Key R&D Program of China(2018YFB1106600)

National Key R&D Program of China(2017YFB1103500)

National Natural Science Foundation of China(51822405)

National Natural Science Foundation of China(51472200)

Aeronautics Power Foundation(6141 B09050337)

Research Fund of Equipment Development Department(61409230402)

Key R&D Program of ShaanXi Province(2018ZDCXL-GY-09-04)

Innovation Fund of the Zhejiang Kechuang New Materials Research Institute(ZKN-18-P04)

Research Fund of the State Key Laboratory of Solidification Processing (NPU)(2019-QZ-02)

出版年

2021
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量48
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