CMC-Processing from Powders by Hot-Pressing

Dong, Shao Ming; Ding, Yu Sheng; Wang, Zhen; Zhou, Qing; Zhang, Xiang Yu; Jiang, Dong Liang; Kohyama, Akira

doi:10.4028/www.scientific.net/AST.50.75

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HomeAdvances in Science and TechnologyAdvanced Inorganic Fibrous Composites VCMC-Processing from Powders by Hot-Pressing

CMC-Processing from Powders by Hot-Pressing

Abstract:

Hot pressing is an effective way to densify powder compacts, especially during the inclusion of a second phase, such as particles, whiskers or fibers. In the present study, SiC/SiC and C/SiC composites were prepared by hot pressing via liquid phase sintering. Nano-SiC powder was used for matrix formation with sintering additives. The effects of preparation conditions such as sintering temperature, pressure and matrix composition, on the microstructural evolution and mechanical behaviors were discussed. Using micro-SiC powder and nano-SiC powder for matrix formation, the interaction between fiber and matrix was characterized. Because the matrix compositions can be easily modified in the CMC-processing from powders by hot pressing, the SiC-BN matrix was also studied in the present experiment. The inclusion of BN can either improve the machinability or provide oxidation resistance to the composite. BN was derived through an in-situ reaction between boron acid and urea by hot-pressing. Boric acid and urea were solved into the ethanol and mixed with nano-SiC particles, and then infiltrated into the fiber bundles. Correlations among microstructures, properties and compositions will be discussed.

Info:

Periodical:

Advances in Science and Technology (Volume 50)

Main Theme:

Advanced Inorganic Fibrous Composites V

Edited by:

P. VINCENZINI and M. SINGH

Pages:

75-82

DOI:

https://doi.org/10.4028/www.scientific.net/AST.50.75

Citation:

S. M. Dong et al., "CMC-Processing from Powders by Hot-Pressing", Advances in Science and Technology, Vol. 50, pp. 75-82, 2006

Online since:

October 2006

Authors:

Shao Ming Dong, Yu Sheng Ding, Zhen Wang, Qing Zhou, Xiang Yu Zhang, Dong Liang Jiang, Akira Kohyama

Keywords:

Ceramic Matrix Composite (CMC), Hot-Pressing, Mechanical Behavior, Microstructural Evolution

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$38.00

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References

[1] T. Ishikawa, Y. Kohtoku, K. Kumagawa, T. Yamamura and T. Nagasawa: Nature 391 (1998), 773.

DOI: https://doi.org/10.1038/35820

[2] S. M. Dong, G. Chollon, C. Labrugere, M. Lahaye, A. Guette, R. Naslain, and D. L. Jiang: J. Mater. Sci. 36 (2001), 2371.

DOI: https://doi.org/10.1023/a:1017988827616

[3] L. Porte and A. Sartre: J. Mater Sci. 24, 271 (1989).

[4] C. Laffon, A. M. Flank, P. Lagarde, M. Laridjani, R. Hagege, P. Olry, J. Cotteret, J. Dixmier, J. L. Miquel, H. Hammel, and A. P. Legrand: J. Mater. Sci. 24 (1989), 1503.

DOI: https://doi.org/10.1007/bf00553188

[5] S. M. Dong, Y. Katoh, and A. Kohyama: J. Am. Ceram. Soc. 86 (2003), 26.

[6] Y. Katoh, S. M. Dong, and A. Kohyama: Ceram. Trans. 144 (2002), 77.

[7] R. Naslain, A. Guette, F. Rebillat, R. Pailler, F. Langlais and X. Bourrat: J. Solid State Chem. 177 (2004), 449.

[8] S. Labruquere, H. Blanchard, R. Paillar, and R. Naslain: J. Eur. Ceram. Soc. 22 (2002), 1011.

[9] F. Lamouroux, S. Bertrand, R. Pailler, R. Naslain, and M. Cataldi: Compos. Sci. Technol. 59 (1999), 1073.

[10] Y. S. Ding, S. M. Dong, Q. Zhou, Z. R. Huang and D. L. Jiang: J. Am. Ceram. Soc. 89 (2006), 1447.

[11] T. Radsick, B. Saruhan, and H. Schneider: J. Eur. Ceram. Soc. 20 (2000), 545.

Paper TitlePages

Tensile Properties and Water Absorption Behavior of Bamboo Fiber Reinforced Composites

Authors: Hyo Jin Kim, Do Won Seo, Jae Kyoo Lim, Toru Fujii

417

Preparation and Mechanical Properties of C/C-SiC Composites

Authors: Dong Mei Zhu, Hong Na Du, Fa Luo, Wan Cheng Zhou

Abstract: Porous C/C composite with certain porosity prepared by Chemical vapor infiltration (CVI) was chosen as the preforms to develop the C/C-SiC composites through precursor infiltration and pyrolysis(PIP), using PCS (polycarbosilane) as the precursor and divinylbenzene as solvent and cross-linking reagent for PCS. The effect of the infiltration solution with different PCS/DVB ratio on the final density, microstructure, and mechanical properties of composites was investigated and the proper PCS/DVB ratio to prepare the C/C-SiC composites was suggested. The experimental results showed that the final densities and the mechanical properties of the composites were close related to the PCS/DVB ratio. Higher PCS/DVB ratio resulted in higher final density and better mechanical properties, but not the highest PCS/DVB ratio could get the best mechanical properties. The main reason is that too high PCS/DVB ratio will make the infiltration process become difficult and lead to the formation of lots of pores in the final composite, at last lowers the mechanical properties. It is believed that the 50% PCS content is proper to prepare the C/C-SiC composites. The composite from 50% PCS infiltration solution could get the final density of1.696g/cm3, the flexural strength of 171Mpa, and shearing strength of 21.6Mpa, which are the best mechanical results among the obtained materials.

1501

Investigation of Mechanical Property and Thermal Shock Behavior of Machinable B₄C/BN Ceramics Composites

Authors: Tao Jiang, Hai Yun Jin, Zhi Hao Jin, Jian Feng Yang, Guan Jun Qiao

Abstract: The machinable B4C/BN ceramics composites were fabricated by hot-pressing sintering process at 1850oC for 1h under the pressure of 30MPa. The mechanical property, thermal shock behavior and machinability of the B4C/BN ceramics composites were investigated in this article. The experimental results showed that the fracture strength and fracture toughness of the B4C/BN nanocomposites were significantly improved in comparison with the B4C/BN microcomposites. The Vickers hardness of the B4C/BN nanocomposites and B4C/BN microcomposites decreased gradually with the increasing content of h-BN, while the machinability of the B4C/BN nanocomposites and B4C/BN microcomposites were significantly improved. The B4C/BN ceramics composites with the h-BN content more than 20wt% exhibited excellent machinability. The thermal shock resistances of the B4C/BN ceramics composites were better than that of the B4C monolith, and the thermal shock resistance of the B4C/BN nanocomposites was much better than that of the B4C/BN microcomposites. The thermal shock temperature difference (-Tc) of B4C monolith was about 300oC, while the -Tc of the B4C/BN microcomposites was about 500oC, the -Tc of the B4C/BN nanocomposites was about 600oC.

In Situ Fabrication and Microstucture of ZrB₂ Particles Reinforced Aluminum Matrix Composites

Authors: Zhu Rui, Yu Tao Zhao, Song Li Zhang, Zhi Hong Jia

Abstract: Abstract：Aluminum matrx composites reinforced by in situ ZrB2 particles are fabricated from A356-AlB-K2ZrF6 system via in-situ melt reaction method, and the morphologies, sizes and distributions of the in situ particles as well as the microstructures, mechanical mechanisms of the composites are investigated by XRD,SEM,TEM and tensile tests. The results indicate that the morphologies of the in situ particles are mainly with ball-shape, the sizes are in nanometer scale and the distributions in the matrix are uniform. The interfaces between the in situ particles and the aluminum matrix are net and no interfacial outgrowth is observed.

122

Investigation of Fiber-Reinforced Modified Epoxy Resin Composites

Authors: A. Quddos, Mohammad Bilal Khan, R.N. Khan, M.K.K. Ghauri

Abstract: The impregnation of the fiber with a resin system, the polymeric matrix with the interface needs to be properly cured so that the dimensional stability of the matrix and the composite is ensured. A modified epoxy resin matrix was obtained with a reactive toughening agent and anhydride as a curing agent. The mechanical properties of the modified epoxy matrix and its fiber reinforced composites were investigated systematically. The polymeric matrix possessed many good properties, including high strength, high elongation at break, low viscosity, long pot life at room temperature, and good water resistance. The special attentions are given to the matrix due to its low out gassing, low water absorption and radiation resistance. In addition, the fiber-reinforced composites showed a high strength conversion ratio of the fiber and good fatigue resistance. The dynamic and static of the composite material were studied by thermo gravimetric analysis (TGA), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscopy (SEM) with EDX. The influences of processing technique such as curing and proper mixing on the mechanical and interfacial properties were determined. The results demonstrated that the modified epoxy resin matrix is very suitable for applications in products fabricated with fiber-reinforced composites.

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