The effect of interstitial elements on the hydriding-dehydriding characteristics of Ti-Mn hydrides.

The effect of carbon, nitrogen and oxygen in Ti-Mn type alloys on the hydriding-dehydriding characteristics has been investigated phenomenologically.The results obtained are as follows:(1) The hysteresis loops of hydriding-dehydriding process decreased with increasing carbon and nitrogen contents in the range of 0.1-0.4%, 0.05-0.1% respectively, while hydrogen absorption capacity remained almost unchanged.(2) The singular behavior of hysteresis loops may possibly be associated with some lattice strain induced mainly due to the configuration of interstitial solutes in alloy.(3) For TiMn1.49 N0.005 alloy, the hydriding-dehydriding process was tested over 1000 cycles but no variation in hydrogen absorption capacity was substantially observed.