کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7887865 1509792 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication and mechanical properties of boron nitride nanotube reinforced silicon nitride ceramics
ترجمه فارسی عنوان
ساخت و خواص مکانیکی سرامیک سیلیکون نیترید تقویت شده نانوبلور بور نیترید
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
In this study, silicon nitride (Si3N4) ceramics added with and without boron nitride nanotubes (BNNTs) were fabricated by hot-pressing method. The influence of sintering temperature and BNNTs content on the microstructures and mechanical properties of Si3N4 ceramics were investigated. It was found that both flexural strength and fracture toughness of Si3N4 were improved when sintering temperature increases. Moreover, α-Si3N4 phase could transform into β-Si3N4 phase completely when sintering temperature rises to 1800 °C and above. BNNTs can enhance the fracture toughness of Si3N4 dramatically, which increases from 7.2 MPa m1/2 (no BNNTs) to 10.4 MPa m1/2 (0.8 wt% BNNTs). However, excessive addition of BNNTs would reduce the fracture toughness of Si3N4. Meanwhile, the flexural strength and relative density of Si3N4 decreased slightly when BNNTs were added. The related toughening mechanism was also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 6, 15 April 2018, Pages 6456-6460
نویسندگان
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