A STUDY OF THERMAL DESORPTION OF HELIUM FROM HIGH-PURE $\alpha$-Ti AND HYDROGENATED Ti SAMPLES
GOU CHENG-LING (芶成玲)a, WANG PEI-XUAN (王佩璇)a, YAO YU-QIN (姚玉琴)a, FANG ZHENG-ZHI (方正知)a, ZHU PEI-RAN (朱沛然)b
a Department of Meterials Physics, Beijing University of Science and Technology, Beijing 100083, China; b Institute of physics, Academia Sinica, Beijing 100080, China
Abstract Helium ions have been implanted into highly pure $\alpha$-Ti and hydrogenated Ti samples with energy of 140keV and at dose of 5.2×1017He·cm-2. The retained amount and depth pro-files of helium in the samples were determined by means of proton-enhanced-backscattering (PEBS) at room temperature. The changes of He peaks during isochronical annealing at 100, 200, 300℃,… were monitored in-situ by PEBS for groups of samples. The process of temperature ramping was not stopped until He peaks almost disappeared and hence the release curves were obtained. It was found that ～ 60% of helium was released at 200℃ for high-pure $\alpha$-Ti samples, whereas massive release occurred at 300℃ for the samples with H/Ti=0.9 and at 350℃ for the samples with H/Ti=0.2. The mechanism of He release and the effect of hydrogen were also discussed.
Fund: Project supported by the National Natural Science Foundation of China
Cite this article:
GOU CHENG-LING (芶成玲), WANG PEI-XUAN (王佩璇), YAO YU-QIN (姚玉琴), FANG ZHENG-ZHI (方正知), ZHU PEI-RAN (朱沛然) A STUDY OF THERMAL DESORPTION OF HELIUM FROM HIGH-PURE $\alpha$-Ti AND HYDROGENATED Ti SAMPLES 1995 Acta Physica Sinica (Overseas Edition) 4 380
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