Paper Title:
Joining of SiC Ceramic to High Strength Graphite Using Polysiloxane with Active Additive
  Abstract

In order to contribute to the development of the joining technique of Cf/SiC, joining of SiC ceramic to high strength graphite was investigated. This joining has been successfully realized by reaction joining process using a preceramic polymer, polysiloxane, mixed with the active additive Al-Si powder as joining material. The weld strength is strongly affected by the technological parameters and the ingredient ratio (polysiloxane:Al-Si powder). The optimized factors have been obtained by orthogonal experiments, under which the achieved three-point bending strength of the joints is 96.8% of the strength of the welding base material graphite. The microstructure and composition of the weld zone were analyzed by SEM, EDX and XRD. The results show that the joining material has transformed into a densified interlayer with the thickness of about 15μm. Also, diffusion takes place in the interfacial area, which contributes to a sound interfacial bonding. The interlayer is composed of SiC, Al2O3 and Si.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
2092-2095
DOI
10.4028/www.scientific.net/KEM.353-358.2092
Citation
S. J. Li, X. K. Yuan, T. Zhang, Y. W. Mao, L. S. Yan, "Joining of SiC Ceramic to High Strength Graphite Using Polysiloxane with Active Additive", Key Engineering Materials, Vols. 353-358, pp. 2092-2095, 2007
Online since
September 2007
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Price
$32.00
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