کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5451638 | 1398549 | 2016 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of Core-Shell Structured Cobalt Coated Tungsten Carbide Composite Powders by Intermittent Electrodeposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
شیمی مواد
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Core-shell structured cobalt coated tungsten carbide (WC/Co) composite powders were prepared by intermittent electrodeposition. The influence of process parameters such as current density, single deposition pulse, pH value and surfactants on the formation of WC/Co was investigated and characterized by scanning electron microscopy (SEM), electrochemical station, acidometer and X-ray diffraction (XRD) techniques. The composite powders with 54% cobalt content were fabricated at a current density of 16âA dmâ2, with a load of 10âg dmâ3 WC powders and a stirring speed of 600âr minâ1 at an operation temperature of 40â±â2â°C, and 90% current efficiency was obtained with a single deposition pulse of 1.5âmin and single stirring pulse of 2âmin during 12âmin efficient electrodeposition time. The uniformly distributed WC/Co powders could be obtained in the cobalt electrolyte containing 300âmg dmâ3 PEG-2000. The spherical cobalt grains coated WC particles were prepared in the pH 4â5 electrolyte at the Co deposition rate of 0.58âg minâ1. A practical process for high efficient production of WC/Co powders by electrodeposition was developed in the present work.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 32, Issue 11, November 2016, Pages 1171-1178
Journal: Journal of Materials Science & Technology - Volume 32, Issue 11, November 2016, Pages 1171-1178
نویسندگان
Huan Zhong, Yuejun Ouyang, Gang Yu, Bonian Hu, Dalong Yan,