Gas pressure sintered silicon nitrides

Material type Reaction bonded silicon nitride (RBSN) Sintered RBSN (SRBSN) Sintered silicon nitride (SSN) Gas pressure sintered silicon nitride (GPSN) Hot-pressed silicon nitride (HPSN) Sinter HIP silicon nitride (Sinter-HIPSN) HIP-ed silicon nitride HIP-SN... 

Urashima, K., Tajima, Y, and Watanabe, M. (1992) R-curveand Fatigue behavior of Gas Pressure Sintered Silicon Nitride, in Fracture Mechanics of Ceramics, vol. 9 (ed. R.C. Bradt), Plenum Press, New York, USA, pp. 235-310. 

Figure 16.13 Relationship between thermal conductivity and four-point bending strength of various types of high-thermal conductivity Si3N4 fabricated by different routes. GPSN = gas-pressure-sintered silicon nitride SRBSN = sintered reaction-bonded silicon nitride [62].

Since the 1970s, the search for improved materials has led to a better understanding of the role of additives in the densification and microstructural development of silicon nitride-based ceramics and the consequences for final properties [1, 6]. Improvements in powder manufacture and forming techniques and the development of alternative firing processes has led to a complete family of materials including RBSN, HPSN, sintered silicon nitride (SSN), sintered reaction-bonded silicon nitride (SRBSN), gas-pressure sintered silicon nitride (GPSSN), hot isostatically pressed silicon nitride (HIPSN) and silicon nitride alloys or solid solutions termed SiAlONs, based on their elemental components. 

Tiegs, T. N., et al.. Effects of Processing Parameters on Densification and Mechanical Properties of Gas-Pressure Sintered Silicon Nitride, in Ceramic Engineering and Science Proc., Am. Ceram. Soc. Publishers, pp. 677-685 (1994)... 

N. Hirosaki, M. Ando, Y. Akimune and M. Mitomo, Gas-Pressure Sintering of P-Silicon nitride Containing Y2O3 and Nd203 , J. of Ceram. Soc. of Japan, 100, 1992, 817-820. 

M. Mitomo, M. Tsutsumi, H. Tanaka, S. Uenosono and F. Saito, Grain Growth During Gas-Pressure Sintering of P-Silicon Nitride , J. Am. Ceram. Soc., 73, 1990, 2441-45. 

Figure 8.9 Microstructures of silicon nitrides, (a) a-powder with 2 wt% 3-seed crystals, tape-cast and gas-pressure-sintered at 1850°C for 6 h (b) a-powder without 3-seed crystals, hot-pressed at 1750°Cfor2 h (c) a-powderwithout...

SN 88 This is a commercial gas-pressure-sintered grade of silicon nitride produced by NGK Insulators, Ltd, Nagoya, Japan, for the hot-stage components of ceramic gas turbines. This grade of silicon nitride was extensively studied by Wiederhom et al. [20, 24, 30], by Lofaj et al. [15, 25-27, 34—37], and by Wereszczak et al. [38]. 

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