کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1463784 | 989651 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: In situ synthesis of nano size silicon carbide and fabrication of CSiC composites during the siliconization process of mesocarbon microbeads preforms In situ synthesis of nano size silicon carbide and fabrication of CSiC composites during the siliconization process of mesocarbon microbeads preforms](/preview/png/1463784.png)
CSiC composites with carbon-based mesocarbon microbeads (MCMBs) preforms are a new type of high-performance and high-temperature structural materials for aerospace applications. In the present study, MCMB-SiC composites were fabricated by liquid silicon infiltration (LSI). Physical and mechanical properties such as density, porosity and bending strength were measured before and after siliconization. The results show the CSiC composites have excellent bending strength, density and porosity of 210 MPa, 2.41 g/cm3 and 0.62%, respectively. The chemical analysis shows that the composite is composed of 89% SiC, 2% Si and 9% C. The microstructural results also show the existence of two different areas of SiC, one zone of coarse micron size SiC at SiCSi interface and the other zone consists of fine nano-SiC particles at SiCC interfaces. The formation mechanism governing the siliconization of porous MCMB preform was also investigated.
Journal: Ceramics International - Volume 38, Issue 6, August 2012, Pages 5081–5087