کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1473703 | 991056 | 2015 | 10 صفحه PDF | دانلود رایگان |
Open cell Si3N4 foams were fabricated by an emulsification process and subsequent sintering. Emulsification took place in an aqueous environment by using octane as alkane phase and a surfactant as stabilizer. Effects of different octane concentrations (50 vol% and 70 vol%) and stirring velocities (700 rpm and 1000 rpm) on porosity and pore size distribution were investigated. The shaped foams were pressureless sintered at 1600 °C inside a modified SPS set-up. Si3N4 foams decorated with SiC nanowires and with an average cell size of 8–41 μm and total porosity of 80–86 vol% were obtained. The compressive strength ranged from 2.0 MPa up to 9.9 MPa. Both the foaming and sintering processes contributed to the development of different microstructures.
Journal: Journal of the European Ceramic Society - Volume 35, Issue 12, October 2015, Pages 3263–3272