Deuterium retention of boron-titanium and reduction of deuterium retention after helium ion irradiations

作者：Hino T^*; Hashiba Y; Yamauchi Y; Nishimura K; Ashikawa N; Sagara A; Noda N; Komori A; Motojima O

来源：Fusion Engineering and Design, 2010, 85(5): 655-660.

DOI：10.1016/j.fusengdes.2010.03.008

• Boron-titanium
• Titanium-boroid
• Boron
• Titanium
• Deuterium retention
• Desorption temperature
• Crystal structure
• Amorphous

Deuterium ion irradiations with an ion with energy of 1.7 key were conducted for boron-titanium (B-Ti) film prepared by electron beam evaporation and hot pressed titanium-boride, TiB(2). The amount of retained deuterium was measured for these materials using a technique of thermal desorption spectroscopy. The amount of deuterium retained in TiB(2) was comparable with that in B-Ti. Desorption peaks of deuterium in B-Ti were 470 K and 620K, corresponding to a desorption in the low temperature regime observed in boron (B) and a desorption in titanium (Ti), respectively. The desorption peaks in TiB(2) were 620 K and 750K, which correspond to the desorption in Ti and that in the high temperature regime in B, respectively. The desorption temperature in B-Ti was approximately 100 K lower than that in TiB(2). This difference is discussed based upon chemical bindings and amorphous/crystal structures of B-Ti and TiB(2). Irradiation of helium ion with energy of 5 key was conducted for B-Ti after the deuterium ion irradiation. The amount of retained deuterium decreased and the desorption temperature shifted to the lower temperature regime, as the helium ion fluence increased. The shift to the low temperature regime is due to the enhancement of amorphous structure of B in B-Ti.

• 出版日期2010-8