کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438907 | 1398189 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of LaB6 content on the gas evolution and structure of ZrC coating for carbon/carbon composites during ablation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
ZrC coatings with different contents of LaB6 for SiC-coated carbon/carbon composites were fabricated by supersonic atmosphere plasma spraying. The mechanism of gas evolution during oxidation at ultra-high temperatures and the oxide scale structure evolution of the coating after addition of LaB6 with different contents were studied. Results showed that rare earth borate rather than rare earth oxide mainly reduced the melting resistance of the oxide scale. The oxide scale for ZrC coating with 10% LaB6 was unfavorable to the gas escape. After addition of 20% LaB6, the oxide scale was favorable to the gas escape but disadvantageous to the coating applied in the environment containing scouring because of the reduced melting resistance. High content of LaB6 also could cause evident boiling of B2O3, leading to producing big pores in the oxide scale during ablation. Appropriate content of LaB6 for ZrC coating was found to be 15%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 4, March 2017, Pages 3601-3609
Journal: Ceramics International - Volume 43, Issue 4, March 2017, Pages 3601-3609
نویسندگان
Yujun Jia, Hejun Li, Xiyuan Yao, Zhigang Zhao, Jiajia Sun,