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An Innovative Process for Production of Ti Metal Powder via TiSx from TiN

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Title: An Innovative Process for Production of Ti Metal Powder via TiSx from TiN
Authors: Ahmadi, Eltefat Browse this author
Suzuki, Ryosuke O. Browse this author →KAKEN DB
Keywords: Titanium
molten salt
titanium nitride
electrochemical reduction
Issue Date: Feb-2020
Publisher: Springer
Journal Title: Metallurgical and materials transactions B-process metallurgy and materials processing science
Volume: 51
Issue: 1
Start Page: 140
End Page: 148
Publisher DOI: 10.1007/s11663-019-01730-w
Abstract: This work presents a new processing concept for production of Ti metal powder from FeTiO(3)via TiN and TiSx. Because FeTiO3 can be converted to TiN by the carbothermal reduction and nitridation method, TiN was taken as the starting material. Ti2.45S4 and TiS2 powders were completely formed from TiN at 1473 K (1200 degrees C) in 3.6 and 10.8 ks, respectively. Either CS2 or S-2 gas could be used for the sulfurization process. The sulfides were then converted to alpha-Ti metal powders by the Ono and Suzuki (OS) process in molten CaCl2 with a small addition of CaS. Employing S-2 gas in the sulfurization step remarkably reduced the carbon contamination to 0.01 and 0.1 wt pct C after the sulfurization and reduction processes, respectively. alpha-Ti powders with spherical morphology and foil-like Ti sheets containing less than 0.15 wt pct O were obtained from the electrochemical reduction in molten CaCl2-0.5 mol pct CaS. The approach applied here offers a promising strategy to design an innovative process for production of commercial grade Ti powders via TiSx and TiN from FeTiO3 by nitridation, sulfurization, and OS processes.
Rights: This is a post-peer-review, pre-copyedit version of an article published in Metallurgical and materials transactions B. The final authenticated version is available online at:
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鈴木 亮輔

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