Presentation Information
[1C01【女子大学院生優秀賞2025】]The effect of oxide layer and ball milling atmosphere on the performance of ball-milled TiH2
*Mei Yuan1, Takahiro Kondo2,3 (1. Degree Programs in Pure and Applied Sciences, Graduate School of Science and Technology, University of Tsukuba, 2. Institute of Pure and Applied Sciences, University of Tsukuba, 3. Advanced Institute for Materials Research (WPI-AIMR), Tohoku University)
Titanium hydrides (TiH2) are reported as hydrogen storage materials because of their high affinity to hydrogen and widely applied as catalysts for other solid-state hydrogen storage materials. Ball milling is one of effective and direct mechanical approaches to reduce the size of TiH2. We investigated the effects of various ball milling parameters on the properties of TiH2, with a particular focus on milling time and milling atmosphere. The results indicate that the performance of ball-milled samples is significantly enhanced, primarily due to the reduction in crystallite/grain size, while the formation of a surface oxide layer serves as a secondary factor. Moreover, the ball-milling atmosphere plays a critical role in determining the final products of milled TiH2, potentially leading to the formation of entirely new phases or compounds.