کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9804162 | 1516479 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation of fine skeletal Co-Ag by chemical leaching of Al-Co-Ag ternary alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Formation of fine skeletal Co-Ag by chemical leaching of Al-Co-Ag ternary alloys Formation of fine skeletal Co-Ag by chemical leaching of Al-Co-Ag ternary alloys](/preview/png/9804162.png)
چکیده انگلیسی
The formation of skeletal silver-cobalt structures was attempted by means of chemical leaching of Al atoms from various ternary Al-Ag-Co alloys which were prepared by rapid solidification or mechanical alloying. Almost all Al atoms were removed for rapidly solidified alloys and their crystallographic structure was changed from fcc of Al into fcc of Ag during chemical leaching. The microstructures of the leached specimens were observed by transmission electron microscopy. TEM observation showed that the leached specimens had a skeletal structure composed of finely distributed particles and fine pores. The particles were classified into two groups by size. The first one was rather large and about 30Â nm in size. The other was fine and a few nanometers. No detectable diffraction peaks corresponding to the Co phase were observed but they were detected after annealing at 1073Â K for 3.6Â ks. The saturation magnetization of the leached specimens gradually increased with increasing temperature and approached to the maximum. A part of this variation was due to the precipitation of Co from the supersaturated Ag(fcc) phase. The chemical leaching of Al-Co-Ag alloys might open the possibility to form a skeletal material with a metastable state in which a few cobalt atoms dissolved into the silver phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 387, Issues 1â2, 25 January 2005, Pages 187-192
Journal: Journal of Alloys and Compounds - Volume 387, Issues 1â2, 25 January 2005, Pages 187-192
نویسندگان
I. Yamauchi, H. Kawamura, K. Nakano, T. Tanaka,