XPS STUDY OF Cu PRECIPITATIONS AT THE SURFACE OF CRYSTALLINE Cu-Zr ALLOYS AFTER ANNEALING IN HYDROGEN | Zendy

Xin-Nan Yu | Zendy

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XPS STUDY OF Cu PRECIPITATIONS AT THE SURFACE OF CRYSTALLINE Cu-Zr ALLOYS AFTER ANNEALING IN HYDROGEN

Author(s) -

Xin-Nan Yu

Publication year - 1991

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.40.1501

Subject(s) - materials science , x ray photoelectron spectroscopy , annealing (glass) , hydrogen , chemisorption , copper , alloy , analytical chemistry (journal) , metallurgy , chemical engineering , chemistry , adsorption , organic chemistry , chromatography , engineering

Crystalline Cu-Zr alloys of various composition were annealed (200-400℃) in ultra-high vacuum and in hydrogen, and their surface composition was analyzed by X-ray photoelec-tron spectroscopy. Contrary to the mostly observed oxygen induced surface segregation of Zr we found strong Cu segregation after annealing Cu-rich sample in hydrogen atmosphere. Scanning electron micrographs show surface Cu precipitates, apparently formed due to the effect of the heat of chemisorption of hydrogen on Cu.

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