|About this Abstract
||Materials Science & Technology 2019
||Additive Manufacturing: Effective Production, Characterization, and Recycling of Powder Materials
||Hydrogen Assisted Magnesiothermic Reduction (HAMR) for Making Low-oxygen Ti Powder
||Pei Sun, Z. Zak Fang, Ying Zhang, Yang Xia, Hyrum Lefler, Tuoyang Zhang
|On-Site Speaker (Planned)
Hydrogen assisted magnesiothermic reduction (HAMR) is a low-cost technology for making Ti and Ti alloy powders with low oxygen. Due to the strong affinity for oxygen, making low-oxygen Ti always requires extensive and costly refining processes. Simple reactions between Mg and TiO2 cannot produce Ti metal with low oxygen content due to thermodynamic limits (Ti-O solid solutions with 1-2 wt.% O is more stable than MgO). In order to overcome the thermodynamic barrier, hydrogen is introduced to destabilize Ti-O solid solutions, thus enabling Mg, in the presence of hydrogen, to extract oxygen out from Ti solid to a very low level. HAMR process has been successfully used to produce low oxygen Ti and Ti alloy powders with O <0.15 wt.%. The principles of HAMR technology can also be utilized to recycle used Ti powders from additive manufacturing.
||Planned: At-meeting proceedings