科研之友
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摘要
The microstructural change in the Pd-coated Nb hydrogen permeable membrane proceeding by hydrogen permeability degradation was observed by cross-sectional transmission electron microscopy (TEM). The columnar microstructure of the Pd layer in the as-deposited sample forms voids open to the surface in the initial stage of heating. These voids correspond to the surface pores observed by scanning electron microscopy (SEM). The microstructural and compositional analysis revealed the formation of the inter-metallic compound Pd3Nb during extended heating, which is found to be responsible for the permeability degradation of Pd-coated Nb membrane.
- 出版日期2013-10-5
