کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1485299 1510537 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Moisture behavior and effects on the mechanical properties and the microstructures of SiO2f/Si3N4–BN amorphous composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Moisture behavior and effects on the mechanical properties and the microstructures of SiO2f/Si3N4–BN amorphous composites
چکیده انگلیسی

Water diffusion in fiber reinforced ceramic composites could reduce the flexural strength as a result of weakened fiber/matrix binding. In the paper, the braided silica fiber reinforced silicon nitride and boron nitride amorphous composites (SiO2f/Si3N4–BN) was prepared through repeated infiltration of hybrid preceramic precursor and pyrolysis at high temperature in ammonia atmosphere. The moisture behavior of the SiO2f/Si3N4–BN composites and moist effects on the mechanical properties and the microstructures of composites were studied. The results showed that the water absorption characteristic of amorphous composites could be described by using the Fick’ law. The flexural strength could be adjusted and the maximal value of that reached 161.7 MPa by controlling moderate relative humidity, which is 58.8% higher more than that of the as-received composites. SEM indicated that good mechanical properties is on the ground of the interface structure change between fiber and matrix and more fibers were pulled out which absorbing much more fracture energy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 353, Issues 22–23, 1 July 2007, Pages 2301–2305
نویسندگان
, , , , , ,