Microstructure formation of rapidly/sub-rapidly solidified Gd-Co-Ti immiscible alloys

doi:10.1016/j.jmrt.2024.09.024

IMR OpenIR

	Microstructure formation of rapidly/sub-rapidly solidified Gd-Co-Ti immiscible alloys
	Sun, Hao 1,2; Jiang, Hongxiang 1,2; Ma, Haobo 1,2; Han, Binghao 1,2; Zhang, Lili 1,2; He, Jie 1,2; Zhao, Jiuzhou 1,2
通讯作者	Jiang, Hongxiang(hxjiang@imr.ac.cn) ; Zhao, Jiuzhou(jzzhao@imr.ac.cn)
	2024-11-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	33 页码:28-38
摘要	Solidification experiments were conducted for ternary Gd-Co-Ti immiscible alloys by copper mold casting. The impacts of the composition and cooling rate on the microstructure features and the properties were investigated. The samples with a composite microstructure were acquired, in which the subglobose TiCo-rich particles homogeneously distribute in the Gd matrix. The microhardness of Gd-Co-Ti alloys increases with the content of Co and Ti and the cooling rate during solidification. To describe the microstructure formation of Gd-Co-Ti immiscible alloys during rapid/sub-rapid solidification, a theoretical model was proposed, and it takes into consideration the comprehensive effects of the nucleation, diffusional growth and spatial motions of the TiCo-rich phase droplets. The solidification microstructure evolution was simulated. The numerical results are well consistent with the experimental data, which verifies the validity of the developed model. Calculations demonstrate that the nucleation of the TiCo-rich droplets only takes place in the liquid-liquid transformation stage, and no nucleation events of the TiCo-rich droplets occurs in the liquid-liquid-solid three-phase transformation stage. The number density (N) and maximum nucleation rate (I-max) of the TiCo-rich droplets/particles is exponentially associated with the cooling rate (T-nuc) of the alloy during the nucleation period of the TiCo-rich droplets. Besides, the Ostwald coarsening of TiCo-rich phase droplets can be ignored under the current cooling conditions.
关键词	Immiscible alloy Composite microstructure Solidification process Liquid-liquid phase separation Modeling and simulation
资助者	China's Manned Space Station Project, China ; National Key Research and Development Program of China, China ; Na-tional Natural Science Foundation of China, China ; Space Utilization System of China Manned Space Engineering, China ; Natural Science Foundation of Liaoning Province, China
DOI	10.1016/j.jmrt.2024.09.024
收录类别	SCI
语种	英语
资助项目	China's Manned Space Station Project, China ; National Key Research and Development Program of China, China[2021YFA0716303] ; Na-tional Natural Science Foundation of China, China[52174380] ; Space Utilization System of China Manned Space Engineering, China[KJZ-YY-NCL06] ; Natural Science Foundation of Liaoning Province, China[2023-MS-023]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001314892000001
出版者	ELSEVIER
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189884
专题	中国科学院金属研究所
通讯作者	Jiang, Hongxiang; Zhao, Jiuzhou
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Sun, Hao,Jiang, Hongxiang,Ma, Haobo,et al. Microstructure formation of rapidly/sub-rapidly solidified Gd-Co-Ti immiscible alloys[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,33:28-38.
APA	Sun, Hao.,Jiang, Hongxiang.,Ma, Haobo.,Han, Binghao.,Zhang, Lili.,...&Zhao, Jiuzhou.(2024).Microstructure formation of rapidly/sub-rapidly solidified Gd-Co-Ti immiscible alloys.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,33,28-38.
MLA	Sun, Hao,et al."Microstructure formation of rapidly/sub-rapidly solidified Gd-Co-Ti immiscible alloys".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 33(2024):28-38.