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

Autor:	Yu Xin-Nan
Rok vydání:	1991
Předmět:	Materials science Hydrogen Scanning electron microscope Annealing (metallurgy) Analytical chemistry General Physics and Astronomy chemistry.chemical_element Oxygen Hydrogen atmosphere Crystallography X-ray photoelectron spectroscopy chemistry Chemisorption Spectroscopy
Zdroj:	Acta Physica Sinica. 40:1501
ISSN:	1000-3290
DOI:	10.7498/aps.40.1501
Popis:	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.
Databáze:	OpenAIRE
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