کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448639 988679 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Through-thickness determination of phase composition and residual stresses in thermal barrier coatings using high-energy X-rays
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Through-thickness determination of phase composition and residual stresses in thermal barrier coatings using high-energy X-rays
چکیده انگلیسی

High-energy X-rays were used to determine the local phase composition and residual stresses through the thickness of as-sprayed and heat-treated plasma-sprayed thermal barrier coatings consisting of a NiCoCrAlY bond coat and an yttria-stabilized zirconia (YSZ) topcoat produced with through-thickness segmentation cracks. The as-sprayed residual stresses reflected the combined influence of quenching stresses from the plasma spray process, thermal expansion mismatch between the topcoat, bond coat and substrate, and stress relief from the segmentation cracks. Heat treatments led to the formation of a thermally grown oxide (TGO) which was in compression in the plane, as well as relief of quenching stresses and development of a stress gradient in the YSZ topcoat. The high-energy X-ray technique used in this study revealed the effects that TGO and segmentation cracks have on the in-plane stress state of the entire coating.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 58, Issue 3, February 2010, Pages 943–951
نویسندگان
, , ,