Affiliation:
1. LNEG - Laboratório Nacional de Energia e Geologia
2. T.U. Lisbon
3. IUT du Limousin
4. Rauschert Portuguesa Ltd.
Abstract
The aim of this work was to analyse the fracture behaviour of commercial dense cordierite bodies sintered in an electrical furnace in static air at 1250°C, 1275°C and 1300°C for 30 min using different cycling schedules in order to obtain tougher materials at minimum energy costs. Using a stereomicroscope and a scanning electron microscope, fracture surfaces of as-sintered bars tested under four-point bending at room temperature were examined at different magnification levels in order to determine the origin of fracture in each sintered bar. Once the fracture origin was identified, it was possible to measure its size, and based on ASTM C1322-96a standard, we were able to estimate the fracture toughness of the sintered parts. Fracture toughness was found to increase with increasing of sintering temperature from 1.8 MPa∙m½ to 3.1 MPa∙m½ by rising the temperature from 1250°C to 1300°C as the fracture process is strongly influenced by the microstructure of the material.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference10 articles.
1. F.A. Costa Oliveira, J. Cruz Fernandes, Mechanical and thermal behaviour of Cordierite-. Zirconia composites, Ceram. Int. 28 (2002) 79-91.
2. A. Yamuna, R. Johnson, Y.R. Mahajan, M. Latithambika, Kaolin-based cordierite for pollution control, J. Eur. Ceram. Soc. 24 (2004) 65-73.
3. S.H. Knickerbocker, A.H. Kumar, L.W. Herron, Cordierite Glass – Ceramics for Ceramic Packaging, Am. Ceram. Soc. Bull. 72 (1993) 90-95.
4. R.J. Beaks, R.L. Cook, Low-Expansion Cordierite Porcelains, J. Am. Ceram. Soc. 35 (1952) 53-57.
5. R. Novakovic, B. Radnovic, Z. Sotojiljkovic, V. Mikijelj, M. Susic, M.M. Ristic, Interceram vol. 35 (1986), 53-54.
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