کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1474432 991089 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Arc jet testing and evaluation of Mo–Si–B coated Mo and SiC–ZrB2 ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Arc jet testing and evaluation of Mo–Si–B coated Mo and SiC–ZrB2 ceramics
چکیده انگلیسی

The transition from blunt leading edges to sharp leading edges on re-entry aircrafts is necessary to increase both maneuverability and safety. However, the oxidation resistance of current materials is inadequate for the extreme conditions experienced by sharp leading edge re-entry vehicles. The Mo–Si–B alloy system has been utilized to design a multilayer coating that has the ability to protect from 800 to 1700 °C. Substrates of Mo and ZrB2–50 vol% SiC with a flat profile were coated with the Mo–Si–B based coating and evaluated using arc jet testing performed at NASA Langley Research Center. Heat fluxes of 2.5 to nearly 3.5 MW/m2 and surface temperatures of 1500–1650 °C were achieved during the 20-min tests. The samples presented in this study showed <3% mass loss and retention of sample shape and integrity, demonstrating the robust environmental protection under a simulated hypersonic environment offered by the Mo–Si–B based coating on refractory metals and ceramics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 34, Issue 15, December 2014, Pages 3521–3533
نویسندگان
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