کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1526763 1511849 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of hot corrosion behaviour of HVOF sprayed NiCrAl coating on superalloys at 900 °C
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Evaluation of hot corrosion behaviour of HVOF sprayed NiCrAl coating on superalloys at 900 °C
چکیده انگلیسی

In the present investigation, NiCrAl coating was deposited on Ni- and Fe-based superalloy substrates by using high velocity oxy-fuel (HVOF) process to study the hot corrosion behaviour in molten salt (Na2SO4–60% V2O5) environment at 900 °C under cyclic conditions. The mass gain measurements were performed after each cycle to establish the kinetics of corrosion using thermogravimetric technique. X-ray diffraction (XRD), scanning electron microscopy/energy dispersive spectroscopic analysis (SEM/EDS) and X-ray mapping techniques were used to analyse the corrosion products. The bare superalloys experienced higher weight gain. The NiCrAl-coated Superni 750 alloy (SN 750) provided a better protection among the coated superalloys investigated. The formation of oxides and spinels of nickel, chromium and aluminum may be contributing better resistance to hot corrosion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 111, Issues 2–3, 15 October 2008, Pages 524–533
نویسندگان
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