کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1635030 1007010 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of nanosized tungsten carbide from phenol formaldehyde resin coated precursors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis of nanosized tungsten carbide from phenol formaldehyde resin coated precursors
چکیده انگلیسی
Nanosized tungsten carbide was synthesized from phenol formaldehyde resin (PF) coated tungsten precursors. The process has three steps in which nanosized tungsten particles were first coated with PF, then the precursors were carburized at 950°C, and finally the carburized powders were treated in flowing wet hydrogen atmosphere at 940°C to remove the uncombined carbon. The obtained powders were characterized using X-ray diffraction analysis (XRD), field-emission scanning electron microscopy (FESEM), small angle X-ray scattering (SAXS), and combustion-gas-volume method. The results indicated that single-phase WC could be synthesized using excessive PF as carburizer at a much lower temperature compared with using mixed carbon black. After wet hydrogen treating, the mean size of the obtained WC particles was 94.5 nm and the total carbon content was 6.18 wt.%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Rare Metals - Volume 27, Issue 2, April 2008, Pages 201-204
نویسندگان
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