کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450649 988740 2007 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermally grown Al2O3 on a H2-annealed Fe3Al alloy: Stress evolution and film adhesion
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Thermally grown Al2O3 on a H2-annealed Fe3Al alloy: Stress evolution and film adhesion
چکیده انگلیسی

Stress evolution in Al2O3 films grown on a Fe3Al-based alloy, with or without a prior H2-anneal heat treatment, was followed in situ with a synchrotron X-ray source at 1000 and 1100 °C and during cooling. These results are complimented by studies of oxidation kinetics, the scale/alloy interfacial chemistry, and the oxide, alloy and interface microstructures. The H2-anneal reduced the sample sulfur impurity to less than 1 ppm, significantly improved scale adhesion, maintained a planar scale/alloy interface, but did not demonstrably affect the oxidation rate or the growth stress development. On the untreated alloy, interface wrinkling was a major stress relief mechanism, but for the H2-annealed samples it was oxide creep with contribution from alloy grain boundary sliding. The interface strength and the extent of oxide spallation were closely related to the amount of sulfur segregated at the interface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 16, September 2007, Pages 5601–5613
نویسندگان
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