کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448051 988663 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Erbium and ytterbium solubilities and diffusivities in aluminum as determined by nanoscale characterization of precipitates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Erbium and ytterbium solubilities and diffusivities in aluminum as determined by nanoscale characterization of precipitates
چکیده انگلیسی

Binary aluminum alloys with 0.03–0.06 at.% RE (RE = Yb or Er) were aged to produce coherent, nanosize Al3RE precipitates in an α-Al matrix. The temporal evolution of precipitate radii and matrix concentrations at 300 °C were measured by transmission electron microscopy and local-electrode atom-probe tomography, respectively. The temporal dependence of the matrix concentration of each RE was utilized to determine its solubility in Al. The solubility and the coarsening rate constants were used to determine the diffusivity of each RE in α-Al and the α-Al/Al3RE interfacial free energies at 300 °C. When compared to Sc, both Yb and Er exhibited smaller solubilities but larger diffusivities in α-Al and larger α-Al/Al3RE interfacial energies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 57, Issue 14, August 2009, Pages 4081–4089
نویسندگان
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