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对不同成分的Cu-Zr合金,在超高真空(UHV)和在氢气氛中200—400℃退火后的光电子能谱(XPS)研究发现,与多数情况下因氧感应致使Zr发生表面分凝相反,富铜样品在氢气氛下退火,Cu发生强烈的表面分凝;扫描电子显微镜得出表面Cu沉积物的显微照片,显然,这是由于Cu上氢化吸附热的影响所形成。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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