کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1471332 990347 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Unusual oxidation behaviour of Zr50Cu50 alloy at high temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Unusual oxidation behaviour of Zr50Cu50 alloy at high temperatures
چکیده انگلیسی
The oxidation of Zr50Cu50 alloy at 500-700 °C is characterized by preferential oxidation of zirconium, while the excess of copper is accumulated at the alloy-oxide interface forming the Zr14Cu51 phase. The strong reaction at 800 and 850 °C resulted in the total corrosion of the specimens in 21 and 15 h, respectively. The oxidation at elevated temperatures showed an anomalous decrease of the oxygen consumption rate in the temperature range 930-1000 °C, corresponding to the preferentially oriented crystallites of ZrO2 in the oxide scale at 900 and 1000 °C. The oxide layer consists of ZrO2 and CuO in the whole temperature interval of the oxidation. The reaction kinetics obeys a parabolic rate law. An activation energy of 92.0 ± 0.3 kJ/mol has been estimated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Corrosion Science - Volume 50, Issue 3, March 2008, Pages 818-822
نویسندگان
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