Study of the deuterated titanium Ti2Hx sample by using nuclear reaction analysis and material analysis methods

Titanium is one of the best hydrogen loading material. The pre dicted maximum loading ratio of hydrogen in titanium may reach to 2.0. In this work, a titanium layer on molybdenum substrate was deuterated with the atomic ratio X =2H/Ti>1.6. The change of the surface topography and microstructure of the sample before and after loading was observed by using Scan Electron Microscopy (SEM). The surface segregation of the samples after deuteron bombardment was also observed. A fiuctuatingly-incrcasing trend of the deuterium density in titanium target was detected in the deuteron implantation experiments. which indicated a suddenly explosion (segregation) or fast diffusion of deuterium in the titanium. Significant amount of nitrogen contamination was found in the Ti2Hx sample by nuclear reaction analysis (NRA), which indicated that the Ti2Hx structure might have the feature to trap nitrogen from air. The nitrogen contamination in Ti2Hx significantly affects the increase of the atomic ratio X =2H/Ti.