Slip cast nitride-bonded silicon carbide bodies

Ramachandra Rao, R and Kannan, TS (2002) Slip cast nitride-bonded silicon carbide bodies. Materials Chemistry, 75. pp. 270-275.

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The dispersion behaviour of SiC, Si and their mixtures, in deionised water, was studied as a function of pH by sedimentation, viscosity, rheology and zeta potential measurements. Slips of SiC + Si mixtures (3:1, 1:1 and 1:3 weight ratios) with 1wt.% of Fe2O3 (with respect to Si), conditioned in the pH range 8–9.5 were slip cast to 56–65% dense green bodies. These on nitridation under 0.18MPa pressure of high-purity nitrogen at 1400–1450 ◦C for 2–4 h resulted in nitride-bonded SiC bodies having 30–76 vol.% of Si3N4 bond,densities of 2.1–2.4 g cm−3 and 3-point flexural strengths of 60–220MPa. The phase analyses of the products were carried out by XRD and microstructure by SEM studies. © 2002 Published by Elsevier Science B.V.

Item Type: Article
Uncontrolled Keywords: Slip casting; Nitridation; Nitride-bonded silicon carbide; SiC–Si3N4
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Ms Indrani V
Date Deposited: 02 Jan 2014 10:24
Last Modified: 03 Jan 2014 08:33

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