کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5352363 | 1388149 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
WC/Co composite surface structure and nano graphite precipitate induced by high current pulsed electron beam irradiation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
High current pulsed electron beam (HCPEB) irradiation was conducted on a WC-6% Co hard alloy with accelerating voltage of 27 kV and pulse duration of 2.5 μs. The surface phase structure was examined by using glancing-angle X-ray diffraction (GAXRD), scanning electron microscope (SEM) and high resolution transmission electron microscope (HRTEM) methods. The surface tribological properties were measured. It was found that after 20 pulses of HCPEB irradiation, the surface structure of WC/Co hard alloy was modified dramatically and composed of a mixture of nano-grained WC1âx, Co3W9C4, Co3W3C phases and graphite precipitate domains â¼50 nm. The friction coefficient of modified surface decreased to â¼0.38 from 0.6 of the initial state, and the wear rate reduced from 8.4 Ã 10â5 mm3/min to 6.3 Ã 10â6 mm3/min, showing a significant self-lubricating effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 285, Part B, 15 November 2013, Pages 552-556
Journal: Applied Surface Science - Volume 285, Part B, 15 November 2013, Pages 552-556
نویسندگان
S.Z. Hao, Y. Zhang, Y. Xu, N. Gey, T. Grosdidier, C. Dong,