0.35)alloys were investigated based on the experiments and kinetic function calculations. The results show that with the increase of vanadium content
the microstructure transforms from primary single Laves phase into Laves phase and low V body center cubic(BCC)solid solution double phases
and high V BCC solid solution single phase finally. Correspondingly
the kinetic mechanisms of hydrogen absorption in these alloys are found to be controlled firstly by a chemical reaction mechanism
then by a nucleation and growth mechanism
and a 3-dimensional diffusion mechanism. An apparent correspondence between phase structure and hydrogen absorption mechanism is observed - the alterant kinetic mechanisms often obviously change the kinetic reaction rate espec
ially
for the faster chemical reaction mechanism and slower 3-dimensional diffusion mechanism.
关键词
Keywords
references
SEO C Y, KIM J H, Lee P S, et al. Hydrogen storage properties of vanadium-based bcc solid solution metal hydrides [J]. J Alloys Comp, 2003, 348(1/2): 252-257.
OKADA M, KURIIWA T, TAMURA T, et al. Ti-V-Cr bcc alloys with high protium content [J]. J Alloys Comp, 2002, 330/332: 511-516.
CHO S W, HAN C S, PARK C N, et al. The hydrogen storage characteristics of Ti-Cr-V alloys [J]. J Alloys Comp, 1999,288(1/2):294-298.
ARASHIMA H, TAKAHASHI F, EBISAWA T, et al. Correlation between hydrogen absorption properties and homogeneity of Ti-Cr-V alloys [J]. J Alloys Comp, 2003, 356/357:405-408.
王常珍. 冶金物理化学研究方法 [M]. 北京:冶金工业出版社, 2002: 428-454.
MARTIN M, GOMMEL C, FROMM E, et al. Absorption and desorption kinetics of hydrogen storage alloys [J]. J Alloys Comp, 1996, 238(1/2):193-201.
LI Q, CHOU K C, JIANG L J, et al. Hydrogen absorption and desorption kinetics of Ag-Mg-Ni alloys [J]. Int J Hydrogen Energy, 2004,29(8): 843-849.