Some properties of silicon carbide composites fabricated with chopped Si-Al-C fibres
by Kiyoshi Itatani, Tsuyoshi Tanaka, Ian J. Davies, Mamoru Aizawa, Isao Okada, Hiroshi Suemasu, Akira Nozue
International Journal of Materials and Product Technology (IJMPT), Vol. 16, No. 1/2/3, 2001

Abstract: Silicon carbide (SiC) ceramics reinforced with 10∼50 mass% of chopped Si-Al-C fibre (average length; 394µm) and 5 mol% of A1₄C₃ as a sintering aid were fabricated by hot pressing at 1800°C for 30 min under a pressure of 31 MPa. The hot-pressed SiC compact with 40 mass% of chopped Si-Al-C fibre addition showed a maximum relative density (96.8%) among the specimens examined and a Vickers hardness (H_v) of 28.3 GPa. The highest fracture toughness (K_IC) (3.9 MPa • m^1/2) was achieved at 30 mass% of Si-Al-C fibre addition. These H_v and K_IC values were higher than those (H_v ;17.0 GPa and K_IC 2.1 MPa • m^1/2

Online publication date: Fri, 01-Oct-2004

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