Chakrabarti, Omprakash and Mallick, D and Maiti, Himadri Sekhar and Majumdar, R (2006) Microcellular Si/SiC ceramics by replication of Indian dicotyledonous woods. Transactions of the Indian Ceramic Society, 65 (1). pp. 23-28. ISSN 0371-750X

[img] PDF - Published Version
Restricted to Registered users only

Download (1477Kb) | Request a copy


Three dicotyledonous woods of local origin (mango (Mangifera indica), jackfruit (Artocarpus integrifolia) and teak (Tectona grandis)) were transformed by pyrolysis into carbonaceous preforms and subsequently converted into microcellular Si/SiC ceramics by liquid Si-infiltration under vacuum. The pyrolyzed mango, jackfruit and teak were characterized in terms of pyrolysis weight loss, shrinkages, bulk density and microstructures. The end ceramics were found to be 91-98% dense with respect to theoretical densities (T.D.) with porosities in the range of 0.1-4.8%. SEM (in back scattered electron (BSE) mode) imaging confirmed the preservation of microcellular tissue anatomy of the precursor wood structure in the morphologies of the final ceramics. The microcellular Si/SiC ceramics from mango, jackfruit and teak exhibited excellent oxidation resistance during heating to 1350oC in flowing air, showing a marginal weight gain at the highest temperature. Si/SiC-mango was also characterized in terms of flexural strength, Young’s modulus and hardness. These biostructural microcellular Si/SiC ceramics possess application potential in various structural ceramic sectors (e.g. mechanical pump seals, wear inserts, kiln support structures, heat exchangers etc).

Item Type: Article
Subjects: Engineering Materials
Divisions: Non-Oxide Ceramics & Composites
Depositing User: Bidhan Chaudhuri
Date Deposited: 05 Mar 2012 08:33
Last Modified: 13 Apr 2015 07:31

Actions (login required)

View Item View Item