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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 5    October 2003

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Synthesis and characterization of metastable Ag-B solid solutions
ZHANG Jiang(张 弜)1, LI Zong-quan(李宗全)1,2, SHA Jian(沙 健)3

1. Department of Materials Science and Engineering,
Zhejiang University, Hangzhou 310027, China;
2. State Key Laboratory of Silicon Materials,
Zhejiang University, Hangzhou 310027, China;
3. Department of Physics, Zhejiang University, Hangzhou 310027, China

Abstract:Mechanical alloying (MA) was applied to Ag-B immiscible binary systems by ball milling elemental Ag and B powders. The microstructural characterization of the milled powders was carried out by XRD and TEM. The results show that face-centered-cubic (FCC) Ag-B solid solutions are formed and that the maximum ratio of B to Ag is 4∶1. The structure evolution of Ag-B solid solution during ball milling indicates that the formation of Ag-B solid solution may be divided into two stages, which are mainly substitutional and interstitial solutions separately. The decomposition of the as-milled granules under the irradiation of electron beam is observed by TEM, which reveals that the solid solutions are metastable.

 

Key words: mechanical alloying; Ag-B solid solution; metastable.

ISSN 1672-7029
CN 43-1423/U

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