Effects of yttrium on wettability and interactions between molten superalloy and SiO2-based ceramic core

doi:10.1016/j.ceramint.2019.11.228

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	Effects of yttrium on wettability and interactions between molten superalloy and SiO2-based ceramic core
	Zi, Yun 4,5; Meng, Jie 5; Zou, Mingke 5; Xu, Wei 2,3; Li, Jinguo 5; Xu, Ke 4,5; Zhou, Yizhou 5; Ding, Yutian 1
	2020-04-15
关键词	Alumina Aluminum oxide Hafnium oxides Silica Silicon Superalloys Wetting Yttrium Yttrium aluminum garnet ZirconiaHigh quality High temperature Interface reactions SiO2-based ceramic core Superalloy castings Wetting angle Y3Al5O12
卷号	46
期号	6
DOI	10.1016/j.ceramint.2019.11.228
页码	7324-7335
英文摘要	In order to obtain high-quality superalloy castings, the wettability and interactions between superalloy melts with various Y contents and SiO2-based ceramic cores were investigated at 1823 K. The results indicated that the wettability and interface reactions were affected by the content of Y in the alloy. For the alloys with Y content less than 0.011 wt%, no Y-oxide was found at the interface, but HfO2, Al2O3 and ZrO2 phases were formed, and the wetting angle dropped slightly. However, different Y-oxides precipitated at the alloy-ceramic interface for the alloys with Y content more than 0.017 wt%, and the wetting angle dropped sharply. When the content of Y was 0.017 and 0.025 wt%, Al2O3, Y3Al2(AlO4)3, HfO2 and ZrO2 phases were formed at the interface. When the content of Y was 0.1 wt%, YAlO3, Y3Al5O12, Y4Al2O9, HfO2 and ZrO2 phases were formed. The formation of different reaction products was mainly caused by the change of Y activity (aY) in the alloy. The reaction between Y and SiO2 could improve the wettability of the system apparently. © 2019 Elsevier Ltd and Techna Group S.r.l.
会议录	Ceramics International
会议录出版者	Elsevier Ltd
语种	英语
ISSN号	02728842
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132689]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China 2.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang; 110819, China; 3.Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, Delft; 2629HS, Netherlands; 4.Department of Materials Science and Engineering, University of Science and Technology of China, Hefei; 230026, China; 5.Institute of Metal Research, Chinese Academy of Sciences, Shenyang; 110016, China;
推荐引用方式 GB/T 7714	Zi, Yun,Meng, Jie,Zou, Mingke,et al. Effects of yttrium on wettability and interactions between molten superalloy and SiO2-based ceramic core[C]. 见:.