کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10626188 | 989643 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tungsten carbide (WC) nanopowders synthesized via novel core-shell structured precursors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
WC powders with a size in the range of 20-60 nm were prepared through carbothermal reduction of a novel core-shell structured precursor in vacuum. The samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). The thermolysis process of the precursor has been investigated by themogravimetric analysis and differential thermal analysis (TG-DSC). The results revealed that the single phase WC nanopowders were synthesized at 980 °C for 1 h. Spectra of XPS indicate that the surface of the specimen mainly consists of W, C and O three species elements only. The effects of experimental parameters and reaction mechanism have been explored. Mainly due to the homogeneous chemical composition of the precursor, the synthesizing temperature was greatly lower than the conventional method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 39, Issue 3, April 2013, Pages 2877-2881
Journal: Ceramics International - Volume 39, Issue 3, April 2013, Pages 2877-2881
نویسندگان
Hua Lin, Bowan Tao, Jie Xiong, Qing Li, Yanrong Li,