کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1660640 1008408 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of rare earths in borax salt bath immersion vanadium carbide coating process on steel substrate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Effects of rare earths in borax salt bath immersion vanadium carbide coating process on steel substrate
چکیده انگلیسی

Various amounts of FeSiRe23, which were used as reducing agents, were added into typical borax salt bath used in thermal diffusion (TD) process to explore the effects of rare earths on borax salt bath vanadizing process and microstructure and properties of vanadium carbide coating. The effect results of rare earths on coating thicknesses at different process conditions showed that the right amount of rare earths could greatly accelerate vanadizing rate and that the accelerating effect worked mainly at the initial stage of TD process and decreased with increasing thickness of vanadium carbide layer. Moreover, the comparison of diffusion activation energies at various temperatures revealed that rare earths have optimal accelerating effect at 950 °C or so. The effect results of rare earths on coating microstructure and properties showed that the addition of rare earths into the borax salt bath can decrease grain size and improve fragility of vanadium carbide coating but decrease coating microhardness. And the electron probe microanalysis (EPMA) revealed that the addition of rare earths could decrease carbon concentration in the coating.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 202, Issue 19, 25 June 2008, Pages 4788–4792
نویسندگان
, , ,