Study on the Gel Casting Process of Silicon Carbide

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Silicon carbide possess high performances such as high hardness and strength, oxidation and high temperature resistance, high thermal conductivity and low thermal expansion coefficient. Widely used methods of molding green body for sintered pressureless bonded silicon carbide comprise dry pressing molding and casting molding. The former fails in preparation of complex shapes, while those prepared by casting molding are prone to have defects such as nonuniformity of density and easy cracking. Gel-casting is a net-shape modeling technology caused by the polymerization of organic monomer (acrylamide). The green bodies molded by gel-casting have uniform structure, high density, high strength and machinability. In this study, gel casting molding and pressureless sintering were used to prepare silicon carbide. The effect of the parameters of gel casting and sintering on the microstructure of the obtained silicon carbide was examined

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Periodical:

Edited by:

Wei Pan, Jianghong Gong

Pages:

138-142

DOI:

10.4028/www.scientific.net/KEM.697.138

Citation:

H. Li et al., "Study on the Gel Casting Process of Silicon Carbide", Key Engineering Materials, Vol. 697, pp. 138-142, 2016

Online since:

July 2016

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$38.00

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[1] Z Ioue, Uemura and Y Inomata. Sintering of silicon carbide I-theory. J. Mater. Sci. 16 (1981) 2297.

[2] Ometete O, Janney M A, Strehlow R A. Gelcasting-A new ceramic process. J. Am. Ceram. Soc. (1991)70-78.

[3] Prochazka S, Scanlan R M. Effect of boron and carbon on sintering of SiC. J. Am. Ceram. Soc. (1975) 58.

[4] Popper P. Special Ceramics. Heywood, London: (1960).

[5] E. Tobin, M. Magida, S. Kishner, et al. Design, fabrication and test of a meter-class reaction bonded SiC mirror. In: SPIE 1995 Inter. Symposium on Silicon Carbide Materials for Optics and Precision Structures. San Diego, California, USA, (1995).

DOI: 10.1117/12.225291

[6] Grande T , Sommerset H , Hagen E, et al. Effect of weight losson liquid-phase-sintered silicon carbide. J A m Ceram Soc, 80(1997) 1047.

DOI: 10.1111/j.1151-2916.1997.tb02945.x

[7] Tamari N, Tanaka T, Tanaka K, et al. Effect of spark plasma sintering on densification and mechanical properties of silicon carbide. J Ceram Soc J pn, 103(1995)40.

[8] Francois G, Allemand A, Lulewicz, et al. Densification of SiC by SPS-effects of time, temperature and pressure. J Eur Ceram Soc , 27( 2007)2725.

[9] Tamari N T , Tanaka, K, et al. Effect of Spark Plasma Sintering on Densification and Mechanical Properties of Silicon Carbide. Journal of Ceramic Society of Japan, 103, (1995)740-742.

DOI: 10.2109/jcersj.103.740

[10] Tamari N, Kondo h I, Tanaka T, et al. Fabrication of Silicon Carbide Ceramics Added with Boron and Carbon by Spark Plasma sintering and Their Mechanical Properties, Journal of the Japan Society of Powder Metallurgy, 47(2004)322-326.

[11] S. Prochazka. Ceramics for High-performance Applications, (1974)239-252.

[12] Dmori M, Jakei H. Preparation of pressureless sintering SiC-Y2O3-Al2O3, J. Mater. Soc., 23 (1988) 3741-3749.

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