Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Hydrogen Embrittlement and Surface Properties of Pd-coated Zr-based Amorphous Alloys

Pd 코팅된 Zr기 비정질 합금의 수소취성 및 표면특성

  • Seok, Song (Advanced Functional Materials Research Center, Korea Institute of Science and Technology(KIST)) ;
  • Lee, Dock-Young (Advanced Functional Materials Research Center, Korea Institute of Science and Technology(KIST)) ;
  • Kim, Ki-Bae (Advanced Functional Materials Research Center, Korea Institute of Science and Technology(KIST))
  • 석송 (한국과학기술연구원 기능금속연구센터) ;
  • 이덕영 (한국과학기술연구원 기능금속연구센터) ;
  • 김기배 (한국과학기술연구원 기능금속연구센터)
  • Published : 2007.06.15
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Abstract

[ $Zr_{50}-Ni_{27}-Nb_{18}-Co_5$ ] amorphous alloys ribbon was prepared by a single-roller melt-spinning technique. In order to improve the hydrogen kinetics Pd-coating were carried out on each side of the amorphous ribbon. Pd prevents oxidation of Zr and catalyses the dissociation of molecular hydrogen to atomic hydrogen. In this work, the hydrogen embrittlement and surface properties on Zr-based amorphous alloys were investigated. The Zr-based amorphous alloys were characterized by X-ray diffractometry(XRD) and differential scanning calorimetry(DSC). The morphology of surface and roughness was observed by using scanning electron microscopy(SEM) and atomic force microscopy (AFM). A lattice parameter of both Pd and Zr-based amorphous alloy was increased after hydrogen permeation at 473 K. After hydrogen permeation at 473 K, some cracks were observed on the surface of Pd, which was the cause for the hydrogen embrittlement. The crystallization temperature of Zr-based amorphous alloy was decreased due to the permeated hydrogen.

Keywords

References

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