In-situ EXAFS study on the thermal decomposition of TiH<SUB>2</SUB>

ZHOU Ying-Li; ZHENG Li-Rong; CHU Sheng-Qi; WU Min; AN Peng-Fei; ZHANG Jing; HU Tian-Dou

doi:10.1088/1674-1137/38/3/038001

Chinese Physics C> 2014, Vol. 38> Issue(3) : 038001 DOI: 10.1088/1674-1137/38/3/038001

In-situ EXAFS study on the thermal decomposition of TiH₂

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Thermal decomposition behaviors of TiH₂ powder under a owing helium atmosphere and in a low vac- uum condition have been studied using an in situ EXAFS technique. By an EXAFS analysis containing the multiple scattering paths including H atoms, the changes of the hydrogen stoichiometric ratio and the phase transformation sequence are obtained. The results demonstrate that the initial decomposition temperature is dependent on experi- mental conditions, which occurs, respectively, at about 300 and 400℃ in a low vacuum condition and under a owing helium atmosphere. During the decomposition process of TiH₂ in a low vacuum condition, the sample experiences a phase change process:δ(TiH₂)→δ (TiH_x)→δ(TiH_x)+β(TiH_x)→δ(TiH_x)+β(TiH_x)+α(Ti)→β(TiH_x)+α(Ti)→α(Ti)+β(Ti). This study o ers a way to detect the structural information of hydrogen. A detailed discussion about the decomposition process of TiH₂ is given in this paper.

References

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ZHOU Ying-Li, ZHENG Li-Rong, CHU Sheng-Qi, WU Min, AN Peng-Fei, ZHANG Jing and HU Tian-Dou. In-situ EXAFS study on the thermal decomposition of TiH₂[J]. Chinese Physics C, 2014, 38(3): 038001. doi: 10.1088/1674-1137/38/3/038001

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Received: 2013-04-22
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

In-situ EXAFS study on the thermal decomposition of TiH₂

Corresponding author: ZHOU Ying-Li,

Corresponding author: HU Tian-Dou,

Received Date: 2013-04-22

Accepted Date: 1900-01-01

Available Online: 2014-03-05

Abstract: Thermal decomposition behaviors of TiH₂ powder under a owing helium atmosphere and in a low vac- uum condition have been studied using an in situ EXAFS technique. By an EXAFS analysis containing the multiple scattering paths including H atoms, the changes of the hydrogen stoichiometric ratio and the phase transformation sequence are obtained. The results demonstrate that the initial decomposition temperature is dependent on experi- mental conditions, which occurs, respectively, at about 300 and 400℃ in a low vacuum condition and under a owing helium atmosphere. During the decomposition process of TiH₂ in a low vacuum condition, the sample experiences a phase change process:δ(TiH₂)→δ (TiH_x)→δ(TiH_x)+β(TiH_x)→δ(TiH_x)+β(TiH_x)+α(Ti)→β(TiH_x)+α(Ti)→α(Ti)+β(Ti). This study o ers a way to detect the structural information of hydrogen. A detailed discussion about the decomposition process of TiH₂ is given in this paper.

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In-situ EXAFS study on the thermal decomposition of TiH₂

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In-situ EXAFS study on the thermal decomposition of TiH₂

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In-situ EXAFS study on the thermal decomposition of TiH2

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In-situ EXAFS study on the thermal decomposition of TiH₂

In-situ EXAFS study on the thermal decomposition of TiH₂