Study on segregation solidification and homogenization behavior of Cu–16Sn–0.3Ti alloy powders

Lin Shi; Juntao Zou; Jing Chen; Hangyu Xue; Junsheng Cheng; Yuxuan Wang; Lixing Sun; Dazhuo Song; Zhiwei Zhang; Yihui Jiang

Journal of Materials Research and Technology (Mar 2023)

Study on segregation solidification and homogenization behavior of Cu–16Sn–0.3Ti alloy powders

Lin Shi,
Juntao Zou,
Jing Chen,
Hangyu Xue,
Junsheng Cheng,
Yuxuan Wang,
Lixing Sun,
Dazhuo Song,
Zhiwei Zhang,
Yihui Jiang

Affiliations

Lin Shi: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Juntao Zou: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China; Corresponding author.
Jing Chen: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Hangyu Xue: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Junsheng Cheng: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
Yuxuan Wang: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Lixing Sun: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Dazhuo Song: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Zhiwei Zhang: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Yihui Jiang: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China

Journal volume & issue: Vol. 23
pp. 5547 – 5558

Abstract

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Low-segregation Cu–16Sn–0.3Ti alloy is the key raw material for the preparation of Nb3Sn superconducting wires. In this work, the non-segregation Cu–16Sn–0.3Ti alloy powders were successfully prepared by using vacuum induction melting inert gas atomization (VIGA) method and homogenization treatment in vacuum. The segregated solidification behavior of atomized Cu–16Sn–0.3Ti alloy droplets during gas atomization, the interface segregation and atomic diffusion behavior of alloy powders during homogenization were investigated. The results show that the segregated solidification of atomized droplets occurs in the form of twinned spherical segment. A critical morphological transition from cellular to dendritic structure occurs when the powder diameter is in the range of 44.1–86.0 μm. With the decreasing of the powder diameter, the lattice distortion in the α phases increases, and the δ phase volume fraction decreases. Increasing the cooling rate of atomized Cu–16Sn–0.3Ti alloy droplets is an important measure to limit the segregation of Sn. The homogenization condition of 550 °C for 96 h is not only conducive to the dissolution of δ phases, but also conducive to inhibiting the significant segregation of δ phases at the powder boundaries. The results provide guidance for the preparation of low-segregation Cu–16Sn–0.3Ti alloys.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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