کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7886109 | 1509785 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanostructured SiC prepared by ultra low temperature densification using amorphous/nano-crystalline bimodal Si-Al-C powder
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Mechanical alloying and spark plasma sintering were used to fabricate dense and nanostructured SiC at 1525â¯Â°C under 40â¯MPa pressure. Round-shaped nanopowder (d50: 108â¯nm) consisting of amorphous Si-Al-C and β-SiC crystallites was prepared using high-energy ball-milling. Aluminum was homogeneously distributed in the Si-Al-C powder. The addition of Al during the milling process caused the decrement in the 3C-SiC crystallinity and promoted the generation of stacking faults in 3C-SiC. Dense SiC with the grain size of 132â¯nm was fabricated after a two-step sintering at 1600-1550â¯Â°C. The Al content in the sintered SiC grain was more than 3 times higher than the reported values. Grain boundary diffusion and lattice diffusion were activated due to the high concentration of Al in the powder.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 13, September 2018, Pages 15176-15180
Journal: Ceramics International - Volume 44, Issue 13, September 2018, Pages 15176-15180
نویسندگان
Bola Yoon, Sea-Hoon Lee, Lin Zhao, Heesoo Lee,