Influence of graphite addition on the reactivity of Ti powder with H2 under ball milling.
The effect of graphite addition on the mechanism of hydrogen uptake by titanium during mechanochemical activation in hydrogen flow was studied using kinetic, structural, microscopic, and spectroscopic techniques. As was found, already a small graphite admixture of about 0.5 wt % changed the kinetics of mechanically induced H2 sorption and significantly stimulated Ti-H2 interaction. Two new types of occupation sites available for hydrogen were observed, which are characterized by low H2 desorption temperatures: about 650 and 750 K instead of 1000 K.
Borchers
C
C
Institute of Material Physics, University of Göttingen, Göttingen, Germany, Chemical Department, Lomonosov Moscow State University, Moscow, Russia.
Khomenko
T I
TI
Morozova
O S
OS
Galakhov
A V
AV
Kurmaev
E Z
EZ
McNaughton
J
J
Yabloskikh
M V
MV
Moewes
A
A