کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5437360 1398173 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxidation resistance of tantalum carbide-hafnium carbide solid solutions under the extreme conditions of a plasma jet
ترجمه فارسی عنوان
مقاومت اکسیداسیون محلول جامد کاربید تانتالوم-هافنیم در شرایط شدید جت پلاسما
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
The oxidation behaviors of tantalum carbide (TaC)- hafnium carbide (HfC) solid solutions with five different compositions, pure HfC, HfC-20 vol% TaC (T20H80), HfC- 50 vol% TaC (T50H50), HfC- 80 vol% TaC (T80H20), and pure TaC have been investigated by exposing to a plasma torch which has a temperature of approximately 2800 °C with a gas flow speed greater than 300 m/s for 60 s, 180 s, and 300 s, respectively. The solid solution samples showed significantly improved oxidation resistance compared to the pure carbide samples, and the T50H50 samples exhibited the best oxidation resistance of all samples. The thickness of the oxide scales in T50H50 was reduced more than 90% compared to the pure TaC samples, and more than 85% compared to the pure HfC samples after 300 s oxidation tests. A new Ta2Hf6O17 phase was found to be responsible for the improved oxidation performance exhibited by solid solutions. The oxide scale constitutes of a scaffold-like structure consisting of HfO2 and Ta2Hf6O17 filled with Ta2O5 which was beneficial to the oxidation resistance by limiting the availability of oxygen.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 17, 1 December 2017, Pages 14798-14806
نویسندگان
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