ISSN:
0142-2421
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
The near atomic composition and the character of chemical bonds in two non-evaporable gettering alloys have been investigated via core level (Zr 3d; Fe 2p; V 2p; O 1s; C 1s) XPS (hv = 1253.6 eV). The samples have been measured in UHV after in-air fracturing and various annealing steps (up to 850 °C). For T 〉 400 °C a progressive and sizeable decrease of the near surface C content along with an increase in the Zr concentration is observed in both alloys. An annealing-induced Zr enrichment at the surface is found, the metallic atomic concentrations being permanently far from the nominal bulk stoichiometry. The annealing induces a strong evolution in the chemical bonds, the metallic species being completely oxidized in-air fractured samples while progressively emerging a metallic character at increasing temperatures. Surface metallization proceeds faster in Zr2Fe than in the V-containing getter.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/sia.740220171
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