کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1603925 1515996 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Grain and phase boundary segregation in WC–Co with TiC, ZrC, NbC or TaC additions
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Grain and phase boundary segregation in WC–Co with TiC, ZrC, NbC or TaC additions
چکیده انگلیسی

The microstructure of interfaces in WC–Co based cemented carbides with TiC, ZrC, NbC or TaC additions was analysed using energy dispersive X-ray analysis in a transmission electron microscope and using atom probe tomography. Segregation to WC/WC grain boundaries and WC/(M,W)C phase boundaries corresponding to between 0.4 and 1.2 atomic layers of close packed monolayers of Co was observed in all the materials. In addition to Co, Ti, Zr and Nb, but not Ta, segregate to the WC/WC grain boundaries. Segregation was also observed for B, P, Fe and Cr, but not Ni, to the boundaries. These are impurities that originate from the material production. Segregation of Ti, Zr, Nb and Ta to WC/binder phase boundaries was observed. If formation of a MC phase at the interface is assumed, the segregation corresponded to a thickness less than a monolayer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 29, Issue 1, January 2011, Pages 38–43
نویسندگان
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