New Approach for Macro Porous RB‐SiC Derived from SiC/Novolac‐type Phenolic Composite. Issue 2 (30th October 2015)

• Record Type: Journal Article
• Authors: Shimamura, Akihiro; Fukushima, Manabu; Hotta, Mikinori; Ohji, Tatsuki; Kondo, Naoki
• Is Part Of: Journal of the American Ceramic Society. Volume 99:Issue 2(2016)
• Page Start: 440
• Page End: 444
• Publication Date: 2015-10-30
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13978
• Languages: English
• ISSNs: 0002-7820

Abstract

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.