Influence of Adding β-SiС on the Performance of α-SiС Pressureless Sintering Ceramics

Abstract:

βThe B₄C and phenolic resin were used as sintering additives to study the different β-SiC（cubic silicon carbide) addition to the performance of α-SiC pressureless sintering ceramics in this paper, and the optimum sintering temperature and the best β-SiC addition amount were determined. By XRD, SEM,density testing and other tests showed that, all the β-SiC transform 6Hα-SiC during the sintering process ,the ceramics have a Vickers hardness of 18.04 GPa,a frature toughness of 4.51MPa ,a density of 3.13g/cm³ by adding 15wt% β-SiC powders.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 765-769
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.765
• Online since: June 2012
• Authors: Li Rong Deng, Shu He Lu, Xue Ying Wang, Jia Bo Wang, Ying Bo Liu, Xiao Gang Wang, Xin Ling Yang
• Keywords: Pressureless Sintering, β-SiC

References

[1] S. G. Lee, M. Mitomo, Relationship between microstructure and fracture toughness of toughened silicon carbide ceramics, J. Am. Ceram. Soc. 84(2001): 1347-1353.

DOI: 10.1111/j.1151-2916.2001.tb00840.x

[2] W. J. Moberlychan, J. J. Cao, L. C. DeJonghe, The roles of amorphous grain boundaries and the β-α transformation in toughening SiC, Acta. Mater. 46(1998): 1625-1635.

DOI: 10.1016/s1359-6454(97)00343-1

[3] M. Castillo-Rodriguez, A. Munoz, A. Dominguez-Rodriguez, Correlation between microstructure and creep behavior in liquid-phasesintered alpha-silicon carbide. J Am Ceram Soc; 89 (2006): 960.

DOI: 10.1111/j.1551-2916.2005.00819.x

[4] X.Z. Guo, X.Y. Zhu, L.J. Zhang, etc, pressureless sintering of silicon carbide nanocomposite ceramics. Journal of The Chinese Ceramic Society, 38(2010): 258-266.

[5] W. Chen, L. Z. Cao, X. J. Zhang, etc, Discussion on pressureless sintering of SiC ceramic, Ordnance Material Science and Engineering, 27(2004): 35-37.