Degradation Properties of Hydrogen Storage Alloys and Change of Microstructure during the Degradation
Ti-Cr-V alloys with body-centered cubic (BCC) structure were investigated on hydrogen absorbing-desorbing cyclic durability by using H2 without and with several concentrations of CO (Hereafter, they are described as pure H2 and n ppm CO, respectively.). The alloy which offers the excellent durability except the early stages of cyclic absorption-desorption under pure H2 atmosphere gave good durability also in a flow of low concentration of CO. However, capacities’ degradation curves under high CO concentration reflected that duration and concentration effects competed with each other. The results suggests to be able to express each degradation by intrinsic and extrinsic factors as an aggregation of several prime functions.
Young Won Chang, Nack J. Kim and Chong Soo Lee
H. Tanaka et al., "Degradation Properties of Hydrogen Storage Alloys and Change of Microstructure during the Degradation", Materials Science Forum, Vols. 561-565, pp. 1613-1616, 2007