期刊
CRYSTAL GROWTH & DESIGN
卷 22, 期 9, 页码 5354-5362出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.cgd.2c00459
关键词
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资金
- National Natural Science Foundation of China [52061135106, 51271055, 51071043]
This study presents a new theory that combines four types of interface kinetics with a generalized interface stability analysis, successfully describing the kinetics of dendrite growth in binary alloy solidification. The theory is validated by quantitative agreement with experimental results and shows a universal capability in describing dendrite growth in other alloy systems.
Crystals often grow into a dendrite-like morphology after nucleation from an undercooled liquid. There are many theories about the kinetics of dendrite growth in undercooled alloys, but quantitative agreement with experiment is rare. We present a new theory that combines four types of interface kinetics with a generalized interface stability analysis for a description of dendrite growth kinetics in binary alloy solidification. The theory was tested using in situ diagnosis of dendrite tip velocity in free solidification of a Co90Cu10 alloy with the aid of a high-speed video camera. Quantitative agreement with experiment is established over a broad range of bath undercoolings, validating the four types of interface kinetics. The theory is also consistent with literature data of dendrite tip velocity-bath undercooling relationships in other alloys, indicating a universal capability of describing dendrite growth kinetics in solidification of binary alloy systems.
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