Synthesis of Mo–Si–B nanocomposite powders by mechanical alloying and subsequent heat treatment

سال انتشار: 1389
محل انتشار: دومین کنفرانس بین المللی کامپوزیت
کد COI اختصاصی: COMPOSIT02_154
زبان مقاله: انگلیسی
تعداد مشاهده: 1446

نویسندگان

PhD student

Associated Professor Department of Material Engineering, Isfahan University of Technology,

چکیده

In this study, Mo–Si–B nanocomposite alloy was synthesized by using a combination of mechanical alloying (MA) and heat treatment. A double-step MA process was carried out in a high energy planetary ball mill. In the first step, Mo-17%mol Si was milled for different milling times. In the second step, B was added to the mechanically alloyed Mo-Si mixtures in order to achieve Mo-12.5Si- 25B, and these new mixtures were milled for 20h. Mechanically alloyed (MAed) powders were annealed in an atmosphere-controlled furnace at 1100°C for 1h. The structural evolutions of MAed and/or annealed powders were evaluated by SEM, optical microscopy, and X-ray diffraction. The lattice parameter of Mo and Mo alloy were estimated using Nelson-Riley function. The results showed that solid solution of α-Mo and small amounts of MoSi2 were formed after double step mechanical alloying. However, α-Mo-Mo5SiB2-MoSi2-Mo3Si composite was successfully formed when the MAed powders were annealed. Molybdenum crystallite size in this composite was in the range of 35-50 nm

کلیدواژه ها

Mechanical alloying; Mo-Si-B; Heat treatment; Nanocomposite

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.