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Journal of Ceramic Science and Technology

The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of  the relationships between processing, microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials. The papers may have either theoretical or experimental background. A high quality of publications will be guaranteed by a thorough double blind peer review process.

The Journal is published by Göller Verlag GmbH on behalf of the Deutsche Keramische Gesellschaft (DKG). Edited by Yu-Ping Zeng, Shanghai Institute of Ceramics, Chinese Academy of Sciences, China.

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Preparation of SiC Ceramics by Laminated Object Manufacturing and Pressureless Sintering

H. Zhong1,2, X. Yao1, Y. Zhu1, J. Zhang1, D. Jiang1, J. Chen1, Z. Chen1, X. Liu1, Z. Huang1

1 State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2 Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

received November 11, 2014, received in revised form January 24, 2015, accepted Febuary 20, 2015

Vol. 6, No. 2, Pages 133-140   DOI: 10.4416/JCST2014-00049

Abstract

In this paper, laminated object manufacturing (LOM) and pressureless sintering were applied to obtain complex-shaped SiC ceramic articles. The SiC green tapes measuring 0.15 mm in thickness used for LOM were prepared by means of organic-solvent-based tape casting. The influences of the binder content, plasticizer/binder ratio and solid loading on the tape properties were investigated and optimized. The binder removal and pressureless sintering processes were studied and optimized to obtain high-quality SiC samples. The relationships between the mechanical properties of the sintered body and the solid loading of green tape were studied. The final part with a relative density of 98.16 % can be obtained with a bending strength, hardness, toughness and elastic modulus of 402 ± 23 MPa, 19.86 ± 0.71 GPa, 3.32 ± 0.29 MPa m1/2 and 393 ± 41 GPa respectively. The result shows that LOM is suitable for the manufacture of SiC products with complex shape and beneficial for the design and small batch fabrication of complex-shaped ceramic parts.

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Keywords

LOM, SiC, tape casting, binder removal, pressureless sintering, mechanical properties

References

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