Liquid migration and peritectic transformation: Investigation on their contributions to growth of peritectic phase in interrupted directional solidification

doi:10.1016/j.icheatmasstransfer.2020.104888

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	Liquid migration and peritectic transformation: Investigation on their contributions to growth of peritectic phase in interrupted directional solidification
	Peng, Peng 1,2,4; Zhang, Xudong 2,4; Xu, Yuanli 2,4; Li, Yuandong 3; Yang, Jieren 1; Zhang, Anqiao 2,4; Yue, Jinmian 2,4
	2020-11-01
关键词	Binary alloys Liquids SolidificationAlpha/beta interface Diffusion controlled Direct precipitation Directional growth Interface migration Peritectic alloys Peritectic reaction Peritectic transformation
卷号	118
DOI	10.1016/j.icheatmasstransfer.2020.104888
英文摘要	The microstructure of peritectic alloys of important applications determines the final properties of them. The growth of peritectic β phase which greatly influences the structure of peritectic systems is divided into three different types: peritectic reaction at TP: L + α → β, then solid-state peritectic transformation α → β and direct precipitation L → β. In addition to transparent organic systems, peritectic transformation was always analyzed using interrupted directional solidification during which the sample is kept stationary after experiencing a distance of directional growth. Then, the growth of β phase through peritectic transformation is accompanied with the migration of the α/β interface towards α phase below TP. However, it is found in Sn[sbnd]Ni peritectic system (L + Ni3Sn2 → Ni3Sn4) that the migration rate of Ni3Sn2/Ni3Sn4 interface is much larger than that of peritectic transformation. Further examination shows that this interface migration can also be induced by the diffusion-controlled liquid migration initiating at the Ni3Sn2/Ni3Sn4 interface. Based on the model describing the liquid migration process, the migration of the Ni3Sn2/Ni3Sn4 interface through liquid migration is predicted, which matches well with the experimental measurement. This shows that the diffusion-controlled liquid migration is dominant during the growth of β phase. Thus, the application of interrupted directional solidification should be further examined. © 2020
会议录	International Communications in Heat and Mass Transfer
会议录出版者	Elsevier Ltd
语种	英语
ISSN号	07351933
WOS研究方向	Thermodynamics ; Mechanics
WOS记录号	WOS:000589864800059
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132644]
专题	兰州理工大学
作者单位	1.School of Materials Science and Engineering, Northwestern Polytechnical University, China; 2.Northwest Rare Metal Materials Research Institute, Shizuishan, China; 3.School of Materials Science and Engineering, Lanzhou University of Technology, China 4.School of Physical Science and Technology, Lanzhou University, Lanzhou, China;
推荐引用方式 GB/T 7714	Peng, Peng,Zhang, Xudong,Xu, Yuanli,et al. Liquid migration and peritectic transformation: Investigation on their contributions to growth of peritectic phase in interrupted directional solidification[C]. 见:.