کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
237482 465709 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interaction of powdery Al, Zr and Ti with atmospheric nitrogen and subsequent nitride formation under the metal powder combustion in air
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Interaction of powdery Al, Zr and Ti with atmospheric nitrogen and subsequent nitride formation under the metal powder combustion in air
چکیده انگلیسی

The combustion process in air for aluminum nanopowders (nAl), micron-sized powders of aluminum (μAl), titanium (μTi) and zirconium (μZr) was accompanied by the predominant reaction of the metals with N2 and the subsequent stabilization of the nitride phases (from 38 wt.% of ZrN for μZr combustion to 72 wt.% of AlN for nAl combustion) in the condensed combustion products (CCP). The combustion process, composition and structure of CCP of nAl, μAl, μTi, and μZr were studied. Scanning electronic microscopy (SEM), X-ray diffraction (XRD), energy dispersive (X-ray) spectroscopy (EDX), and chemical analysis were performed on both initial powders and CCP. The combustion mechanism for the studied metal powders was experimentally proved. The formation of a large amount of non-equilibrium products (AlN, ZrN, TiN) instead of oxides in air is the special feature of the above mentioned experimental conditions. Nitride formation in air was defined by high temperatures and high burning rates during combustion of powdery Al, Ti and Zr.

The experimental data for the process of nitrides formation by Al, Ti, and Zr powders combustion in air are summarized and the phenomenological model for this phenomenon is proposed.Figure optionsDownload as PowerPoint slideHighlights
► Combustion in air for aluminum, titanium and zirconium powders.
► Nitrides were the main final products for Al, Ti and Zr combustion in air.
► Thermodynamical model for nitrides formation by Al, Ti and Zr combustion in air.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 214, Issue 2, 10 December 2011, Pages 229–236
نویسندگان
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