New Approach for Macro Porous RB‐SiC Derived from SiC/Novolac‐type Phenolic Composite |
| |
Authors: | Akihiro Shimamura Manabu Fukushima Mikinori Hotta Tatsuki Ohji Naoki Kondo |
| |
Affiliation: | National Institute of Advanced Industrial Science and Technology, Nagoya, Japan |
| |
Abstract: | A novel fabrication route to make macroporous silicon carbide (SiC) has been proposed in this study. The route is composed of the following two steps: the fabrication of porous α‐SiC/novolac‐type phenolic composite using hexamethylenetetramine (HMT) as a curing/blowing agent for the novolac monomer and a conventional reaction‐bonded (RB) sintering of the composite. The α‐SiC/novolac‐type phenolic composite was carbonized at 800°C for 2 h in N2 gas and then reacted with the molten silicon at 1450°C for 30 min under vacuum, resulting in the macroporous RB‐SiC with an open porosity of 48% and relatively large pore size of ~110 μm. The compressive strength of the macroporous RB‐SiC was 113 MPa, which is relatively high compared to those reported for macroporous SiC of equivalent porosities and pore sizes. |
| |
Keywords: | |
|
|