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摘要:
Using state-of-the-art atomic scale super energy dispersive X-ray spectroscopy and high angle annular dark field imaging this study reveals the elemental partitioning preference between the gamma' and gamma phases in a Co-Al-W-Ti-Ta superalloy and the site preference of its alloying elements in the ordered L1(2) gamma' phase. A semi-quantitative analysis of atomic column compositions in the ordered L1(2) gamma' structure is provided. Co atoms were found to occupy the {1/2, 1/2, 0} face-center positions whereas Al, W, Ti and Ta atoms prefer to occupy the {0, 0, 0} cube corner positions in the L1(2) gamma phase. These findings agree well with predictions from first principles simulations in the literature.
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来源 :
SCIENTIFIC REPORTS
ISSN: 2045-2322
年份: 2017
卷: 7
4 . 6 0 0
JCR@2022
ESI学科: Multidisciplinary;
ESI高被引阀值:283
中科院分区:3
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