کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8029147 | 1517643 | 2013 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nb4Fe4Si7 coatings to protect niobium and niobium silicide composites against high temperature oxidation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The aims of this study were to develop Nb4Fe4Si7 coating for Nb-silicide composite and to assess their oxidation resistance. The Nb4Fe4Si7 was first manufactured as single phase and its oxidation behaviour was characterised from 1100 to 1300 °C. Its oxidation resistance at 1300 °C in air was high because of the formation of a duplex protective oxide layer of Fe2O3 and SiO2. Halide activated pack-cementation was successful to deposit the Nb4Fe4Si7 compound as outer layer of the coating both on pure niobium and Nb-silicide composite. In both cases, the master alloy 10%FeSi2 + 10%NbSi2 + 80%Nb4Fe4Si7 can be employed. Oxidation tests performed both cyclically and isothermally at 1100 °C demonstrated that the oxidation resistance of coated Nb-silicide composite was not as good as that observed on the single phase Nb4Fe4Si7 compound. Nevertheless lifetime as long as 500 1 h-cycle at 1100 °C was obtained both on pure niobium and Nb-silicide composite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 235, 25 November 2013, Pages 144-154
Journal: Surface and Coatings Technology - Volume 235, 25 November 2013, Pages 144-154
نویسندگان
S. Knittel, S. Mathieu, M. Vilasi,