کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1604438 | 1516008 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and characterization of ultrafine WC-Co by freeze-drying and spark plasma sintering
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
A new process for the production of ultrafine WC-Co cemented carbide was developed by freeze-drying and spark plasma sintering. Ammonium meta-tungstate was mixed with cobalt nitrate in the preliminary liquid solution, using liquid nitrogen as the cryogenic medium. W-Co composite nanopowder in the size range 20-30 nm was obtained after freeze-drying, thermal decomposition and reduction. WC-10%Co cemented carbide was synthesized by spark plasma sintering. The sintered body approached its theoretical density, and the crystal size was about 0.7 μm, with hardness of 1719.3 HV0.5. When the sintering temperature increases, the hardness of the cemented carbide will decrease because of the growth in grain size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 27, Issue 1, January 2009, Pages 101-104
Journal: International Journal of Refractory Metals and Hard Materials - Volume 27, Issue 1, January 2009, Pages 101-104
نویسندگان
Xiaoli Xi, Xiong Pi, Zuoren Nie, Shunlin Song, Xiangyang Xu, Tieyong Zuo,