کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1585051 1514912 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural characterization and mechanical properties of SiBONC ceramics derived from polymeric precursors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Structural characterization and mechanical properties of SiBONC ceramics derived from polymeric precursors
چکیده انگلیسی
SiBONC ceramics with specific structural characteristics were designed. Nano-sized amorphous SiBONC ceramic powders were prepared by pyrolysis of polymeric precursors synthesized from chloro-polysiloxane [(SiOClx)n], phenylamine (PhNH2) and boron trichloride (BCl3). Amorphous nano-sized powders were prepared through pyrolysis with designed compositions at Si/B molar ratios of 4:1. The density of the SiBONC ceramics is between 1.95 g/cm3 and 2.15 g/cm3, with the maximum bending strength of 150.50 MPa, Vickers-hardness of 3.78 GPa, fracture toughness of 2.10 MPa m1/2. SiBONC ceramics can keep amorphous state up to 1700 °C, nano-sized β-SiC and bamboo like BN/C filaments can be precipitated from amorphous matrix, which indicates that adulteration of B, C, N can obviously increase crystallization temperature and mechanical property of the SiO2-based ceramics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 432, Issues 1–2, 25 September 2006, Pages 40-46
نویسندگان
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