کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1658010 1517656 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxidation resistance of γ-TiAl based alloy Ti–45Al–8Nb coated with intermetallic Ti–Al–Cr–Y layers and EB-PVD zirconia topcoats at 950 °C in air
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Oxidation resistance of γ-TiAl based alloy Ti–45Al–8Nb coated with intermetallic Ti–Al–Cr–Y layers and EB-PVD zirconia topcoats at 950 °C in air
چکیده انگلیسی

Samples of a high niobium bearing γ-TiAl based alloy were coated with intermetallic Ti–52Al–15Cr–0.4Y (in at.%) layers produced by magnetron sputtering. On some of the specimens thermal barrier coatings of 7 wt.% yttria partially stabilised zirconia were deposited using electron-beam physical vapour deposition. The oxidation behaviour of the coated Ti–45Al–8Nb (at.%) alloy with and without thermal protection was investigated at 950 °C under cyclic oxidation conditions in air. The 20 μm thick Ti–Al–Cr–Y layer exhibited excellent oxidation resistance at this exposure temperature associated with the formation of a thin continuous alumina scale. Lifetimes exceeding 1000 cycles of 1 h dwell time at 950 °C were determined for the TBC system consisting of zirconia topcoat and Ti–Al–Cr–Y bond coat.


► EB-PVD TBC system was applied on gamma titanium aluminides.
► Bond coat used was 20 μm thick Ti–Al–Cr–Y layers produced by magnetron sputtering.
► Lifetimes of the TBC system exceeding 1000 cycles at 950 °C were determined.
► High oxidation resistance of the bond coat at 950 °C in air
► Good adhesion of the YSZ topcoat to the thermally grown oxide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 222, 15 May 2013, Pages 128–134
نویسندگان
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