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Microscopic defects in Ti-Mo alloy hydrides studied by small-angle X-ray scattering

Du Xiao-Ming Dong Bao-Zhong Wu Zhong-Hua Wu Er-Dong Yuan Xue-Zhong

Microscopic defects in Ti-Mo alloy hydrides studied by small-angle X-ray scattering

Du Xiao-Ming, Dong Bao-Zhong, Wu Zhong-Hua, Wu Er-Dong, Yuan Xue-Zhong
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  • Received Date:  14 December 2007
  • Accepted Date:  03 June 2008
  • Published Online:  20 September 2008

Microscopic defects in Ti-Mo alloy hydrides studied by small-angle X-ray scattering

  • 1. (1)沈阳理工大学材料科学与工程学院,沈阳 110168;中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳 110016; (2)中国科学院高能物理研究所同步辐射国家实验室,北京 100049; (3)中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳 110016; (4)中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳 110016;沈阳建筑大学理学院,沈阳 110168

Abstract: In this work,the microscopic defects in Ti-Mo alloy hydrides were studied by using small-angle X-ray scattering (SAXS) technique. The results show that the SAXS intensity measured for hydride of 5at% Mo alloy was lower than that of other hydrides in the high scattering angle range. The crystal grains and its internal sub-structures in the hydrides are the scatterers which cause SAXS. The sub-structures are induced by the large number of dislocations in the hydrides produced during hydrogenation. The crystal structure of Mo 5at% alloy is mainly hcp,but that of the other alloys is bcc. The hydrides of all these alloys, however, have a fcc crystal structure. Therefore,it is indicated that the Ti-Mo alloys with hcp and bcc crystal structures form the same hydride structure,but induce different types of dislocation defects during hydrogenation.

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