کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1475893 991134 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal cycling behaviors of the plasma sprayed thermal barrier coatings of hexaluminates with magnetoplumbite structure
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Thermal cycling behaviors of the plasma sprayed thermal barrier coatings of hexaluminates with magnetoplumbite structure
چکیده انگلیسی

Hexaluminates with magnetoplumbite structure are important high temperature ceramic materials for thermal barrier coatings (TBCs). Four hexaluminate coatings including NdMgAl11O19 (NdMA), SmMgAl11O19 (SmMA), GdMgAl11O19 (GdMA) and SrAl12O19 (SrHA) were prepared by plasma spraying. During plasma spraying, rare earth (RE) hexaluminates are partially decomposed, resulting in the loss of MgO. For RE hexaluminate coatings, the thermal cycling lifetime decreases with the reduction of RE3+ radius, while SrHA has the shortest lifetime. The random arrangement of the platelet-like hexagonal crystals resulted from the recrystallization during thermal cycling may reduce the bond strength of the coatings and make a large contribution to coatings’ failure. The different thermal cycling behaviors of these coatings seem to be dependent on their recrystallization differences to a large extent.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 30, Issue 7, May 2010, Pages 1649–1657
نویسندگان
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