کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1660027 1517691 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tribological and mechanical properties of HFCVD diamond-coated WC-Co substrates with different Cr interlayers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Tribological and mechanical properties of HFCVD diamond-coated WC-Co substrates with different Cr interlayers
چکیده انگلیسی

Chromium interlayers between WC-Co substrates and diamond coating by hot filament chemical vapor deposition (HFCVD) process were produced by two different techniques: using pack chromization and bipolar symmetry pulsed DC reactive magnetron sputtering processes. Both chromium surfaces were found partially transformed into carbide compound layers by energy dispersive X-ray spectrometer (EDS) and X-ray diffractometer (XRD). Daimler–Benz Rockwell-C indentation tests were conducted to evaluate the adhesion properties of diamond coatings with interlayers created by these two techniques. Delamination outside the indentation zones was also observed by a scanning electron microscopy (SEM). Wear resistance of both coatings were investigated by pin-on-disk wear tests. Rather low wear volumes revealed their excellent anti-wear behavior. Good diamond adhesion on chromized interlayers has been attributed to chromium carbide formation on pack chromized film surfaces as well as on PVD ones during the HFCVD process. It is concluded that the adhesion properties and tribological performance of CVD diamond coatings are significantly improved by the proposed two chromium interlayers. However, chromium interlayer produced by pack chromization is more beneficial to the adhesion of diamond coating than that, by PVD process. One reason is the former interlayer's role as a diffusion barrier of cobalt binder, the other is the low cost of the facilities for the pack chromization technique.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 203, Issues 5–7, 25 December 2008, Pages 704–708
نویسندگان
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