Influence of Hot Pressing Process on the Properties of C_f/SiO₂ Composites

Abstract:

C_f/SiO₂ composites were prepared by slurry impregnation-hot pressing process, and their mechanical properties, microstructure and surface morphologies were then investigated. The results indicated that the composites showed the best mechanical properties, and the tensile strength, bending curvature, compression strength were 58MPa, 170MPa, 256MPa respectively. XRD spectrums showed that fused quartz appeared no crystallization during the process. Also from the TEM analysis, we can see that the C_f/SiO₂ composites exhibited the best compactness. All the tests were carried out on the composites autoclaved at 1400°C for 60min, according to which the best hot pressing process was concluded.

• Periodical: Key Engineering Materials (Volume 697)
• Pages: 203-206
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.697.203
• Online since: July 2016
• Authors: Chang Tao Shao, Qi Hong Wei, Hong Sheng Wang, Chong Hai Wang, Qing Li Zhang, Ying Ying Wang
• Keywords: C_f/SiO₂ Composites, Crystallization, Hot-Pressing, Mechanical Properties, Microstructure

References

[1] Guo J K, Yan T S. Fiber reinforced ceramic composite. In: Guo J K ed. The First China-U. S. Bilateral Seminar on Inorganic Materials Research. Beijing, China: Science Press, 1984. 281-290.

[2] Meyer F P. Effect of various fiber additions on t he properties of slip cast fused silica. Symposium on Electromagnetic Windows, Atlanta, 1980. 170-178.

[3] Zhang D H, Li Y, Gao W, et al. Aerosp Mater Technol (in Chinese), 2001 (6): 1-3.

[4] Liu Yan, Jia Dechang, Meng Qingchang. Aerospace Materials & Technology, 2002, 5: 34.

[5] Wu J H. Study on the silica radome composites reinforced by nitride particle (in Chinese, dissertation). Shanghai: Shanghai Institute of Ceramics, Chinese Academy of Sciences, (1999).

[6] Chen H, Zhang L M, Jia G Y, et al. The preparation of 3-D-silica fiber reinforced silica composites. Key Eng Mater, 2003, 249: 159-162.

DOI: 10.4028/www.scientific.net/kem.249.159

[7] Chen Z F, Cheng L F, Xu Y D, et al. J Aero (in Chinese), 2002, 23 (1): 43-47.

[8] Lyons J S, Starr T L. Strengt h and toughness of slipcast fused composites. J Am Ceram Soc, 1994, 77 (6) : 1673-1675.

[9] Vasilos T, Ertiirk T, Ambati R. Ceram Eng Sci Proc, 1993, 14(9~l0): 995.

[10] Jia D C, Zhou Y, Lei T Q. J Eur Cerma Soc, 2003, 23: 801.

[11] Chen H, Zhang L M, Jia G Y, et al. The preparation of 3-D-silica fiber reinforced silica composites. Key Eng Mater, 2003, 249: 159-162.

DOI: 10.4028/www.scientific.net/kem.249.159

[12] Lyons J S, Starr T L. Strength and toughness of slipcast fused composites. J Am Ceram Soc, 1994, 77 (6): 1673-1675.

[13] Zhou Y. Space thermal protection composites and it s application. In: 10th Annual Commemorative Collection of National Fund for Outstanding Young Scientists: Materials Sciences Volume (in Chinese). Beijing: Department of Materials Sciences, National Scientific Fund Committee, 2004. 97-98.