کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1690579 1011266 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Isothermal oxidation behaviour of EB-PVD MCrAlY bond coat
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Isothermal oxidation behaviour of EB-PVD MCrAlY bond coat
چکیده انگلیسی

The isothermal oxidation behaviour of EB-PVD NiCoCrAlY bond coat on nickel based superalloy at different treatment conditions were studied at 1100 °C up to 100 h. The reaction products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDS). It is found that after 10 h oxidation, while a protective alumina layer was developed on pre-oxidized specimens, a mixed oxide layer was observed on non-pre-oxidized specimens. Only after 50 h, spallation was observed on pre-oxidized specimens but did occur after 10 h for a non-pre-oxidized one, in both cases it is believed that the diffusion of the substrate element Ti to the surface of the bond coat deteriorates the adhesion of protective oxide to the bond coat and hence leads to spallation. Oxide rich in Ti was found to be located on the top of column grains rather than in the column grain boundaries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 81, Issue 8, 30 March 2007, Pages 947–952
نویسندگان
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