Fabrication and Properties of Porous Carbon Preforms for Making Reaction Formed SiC

This paper describes a proper low cost way to fabricate defects free porous carbon preforms with interconnect pore structure for making reaction formed SiC (RFSC). Taking charcoal , poplar powder, camphene and polymer dispersant together, making slurries by milling under 55 °C for several hours, con...

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Bibliographic Details
Published in:	Key Engineering Materials 2016-07, Vol.697, p.169-172
Main Authors:	Huo, Yan Li, Hu, Chuan Qi, Liu, Hai Lin, Chen, Yu Feng, Chen, Shu Guang, Huang, Xiao Ting, Tang, Jie, Liang, Hai Long
Format:	Article
Language:	eng
Subjects:	Carbon Charcoal Density Flexural strength Poplar Porosity Preforms Silicon carbide
Online Access:	Get full text
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Summary:	This paper describes a proper low cost way to fabricate defects free porous carbon preforms with interconnect pore structure for making reaction formed SiC (RFSC). Taking charcoal , poplar powder, camphene and polymer dispersant together, making slurries by milling under 55 °C for several hours, controlling the content of charcoal and poplar powder, after casting, sublimating and carbonizing, the porous carbon performs with a series density (0.66 g/cm3-0.78 g/cm3) and porosity (62.9 vol.%-68.6 vol.%) were prepared; through the Si infiltrating process under a vacuum condition (~5.0 Pa) at 1500°C for about 0.5 hour, the RFSCs with fine mechanic performance were fabricated, one RFSC sample has the density, Weibull modulus, and the max three points flexural strength is 2.91 g/cm3, 9.5 and 505.0 MPa respectively.
ISSN:	1013-9826 1662-9795 1662-9795