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Chloro-deoxidation Behavior of Titanium Powder with SnCl2 Addition

  • Microstructural Evolution in Powder Processing
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Abstract

Powder metallurgy (PM) offers cost-effective potential for manufacturing titanium and titanium alloys. High oxygen content on titanium powder surface is a key problem affecting the mechanical properties of PM Ti alloys. Therefore, this study proposes a chloro-deoxidation method to reduce the oxygen content of titanium powder via introducing stannous chloride (SnCl2) into titanium powder. In the sintering process, SnCl2 reacts with the surface oxide on titanium powder to remove the oxide film, and thus forms gas TiClxOy esca** from Ti matrix, resulting in the decrease of oxygen content. With ~ 2.5 wt.% SnCl2 addition, the oxygen content reduces from 0.6 wt.% to 0.5 wt.%. Accordingly, the elongation of as-sintered Ti-SnCl2 sample significantly increases from 4.8% to 11% (increasing by 129%), while the tensile strength decreases from 815 MPa to 788 MPa. After HIP treatment, the elongation increases from 11% to 13%, and the strength is about 765 MPa. Although same Sn content (5 wt.%) is added in Ti samples, Ti-SnCl2 sample shows higher elongation value of 9.4% compared to Ti-Sn sample (3.6%), due to lower oxygen content.

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Acknowledgements

This study receives the financial support from the National Natural Science Foundation of China (Nos. U21A200305, and 52004027), the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) (No. 311021013), and the Research Project on Characteristic Innovation of University Teachers in Foshan City (NO. 2021XJZZ07).

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Authors and Affiliations

  1. Institute for Advanced Materials and Technology, University of Science and Technology Bei**g, Bei**g, 100083, China

    Fang Yang, Yanli Li, Zhi Guo, Yanru Shao, Cunguang Chen & Zhimeng Guo

  2. Innovation Group of Marine Engineering Materials and Corrosion Control, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, China

    Fang Yang, Yanli Li, Zhi Guo, Yanru Shao, Cunguang Chen & Zhimeng Guo

  3. Shunde Graduate School of University of Science and Technology Bei**g, Guangzhou, 528399, China

    Fang Yang, Cunguang Chen & Zhimeng Guo

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Yang, F., Li, Y., Guo, Z. et al. Chloro-deoxidation Behavior of Titanium Powder with SnCl2 Addition. JOM 75, 2578–2589 (2023). https://doi.org/10.1007/s11837-023-05825-3

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