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Metallurgical and Materials Transactions B
Erschienen in: Metallurgical and Materials Transactions B 2/2020

19.12.2019

Ultimate Deoxidation Method of Titanium Utilizing Y/YOCl/YCl3 Equilibrium

verfasst von: Akihiro Iizuka, Takanari Ouchi, Toru H. Okabe

Erschienen in: Metallurgical and Materials Transactions B | Ausgabe 2/2020

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Abstract

Deoxidation methods of titanium (Ti) scrap and Ti powder have become increasingly important in recent years. Some rare earth (RE) metals with strong deoxidizing capabilities, including Y, La, Ce, and Ho, are candidate agents for the development of a new deoxidation technology. In this study, a new method was developed to directly remove oxygen (O) from Ti using the Y/YOCl/YCl3 equilibrium. According to the calculation based on available thermodynamic data in the literature, the O concentration in β-Ti can be reduced to less than 10 ppm O at 1300 K (1027 °C) in the Y/YOCl/YCl3 equilibrium. To demonstrate the effectiveness of this method using the Y/YOCl/YCl3 equilibrium, the deoxidation limits of Ti samples using Y metal in YCl3 (l) or in YCl3-NaCl-KCl (l) at 1300 K (1027 °C) were experimentally investigated in this study. As a result, the O concentrations in the Ti samples were from 30 to 60 ppm O in YCl3 (l). This result revealed that Ti with extremely low O concentration can be reliably obtained using the RE/REOCl/RECl3 equilibrium for the first time. The establishment of this process will realize efficient recycling of Ti scrap and production of low O concentration Ti powder, which contribute to the large-scale use of Ti products.
Vorheriger Artikel Phase Equilibrium Studies of Iron Silicate Slag in the Liquid/Spinel/White Metal/Gas System for Copper Converting Process
Nächster Artikel Al-Monohydrate (Boehmite) to Al-Trihydrate (Bayerite/Gibbsite) Transformation During High-Energy Milling

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Metadaten
Titel
Ultimate Deoxidation Method of Titanium Utilizing Y/YOCl/YCl3 Equilibrium
verfasst von
Akihiro Iizuka
Takanari Ouchi
Toru H. Okabe
Publikationsdatum
19.12.2019
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions B / Ausgabe 2/2020
Print ISSN: 1073-5615
Elektronische ISSN: 1543-1916
DOI
https://doi.org/10.1007/s11663-019-01742-6

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