Electrochemical hydrogenation after mechanical activated near equiatomic Ti-Ni powder

International Scientific and Technical Youth Conference "Perspective Materials of Constructional and Medical Purpose"

材料科学;医药卫生

Abdulmenova, E.^1 ; Vaulina, O.^1 ; Kulkov, S.^1^2

National Research Tomsk Polytechnic University, Tomsk, Russia^1

Institute of Strength Physics and Materials Science, SBRAS, Tomsk, Russia^2

关键词: Amorphous state;    Average particle size;    Electrochemical hydrogenation;    Incubation time;    Mechanical activation;    Ni powder;    Phase based;    Planetary ball milling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/511/1/012009/pdf
DOI  :  10.1088/1757-899X/511/1/012009

来源: IOP

【 摘 要 】

It has been studied an effect of mechanical activation in a planetary ball milling on the electrochemical hydrogenation of Ti-Ni powder near equiatomic content. It has been shown that average particle sizes measured by scanning electron microscope decreased from 11.1 to 7.8 μm up to 30 s mechanical activation, then increased to 33.2 μm for 300 s activation. Beside, with an increase in the time of mechanical activation was formed state with small the coherently diffracting domain which correspond to quasi-amorphous state of material. It has been shown that after hydrogenation, the particle size distribution did not change. There is an incubation time hydrogenation for mechanical activation, when hydrogenation is not occurring. Mechanical activation for more than 30 s leads to the formation of the Ti2NiHx phase based on the Ti2Ni and 50 s activation is sufficient to form the Ti2NiH0.5 stoichiometry. For a longer mechanical activation a phase with the stoichiometry Ti2NiH0.85 was formed and to obtain the Ti2NiH stoichiometry it is necessary to carry out activation for 4.5 hours.