Superplastic Sinter-Forging of Fine-Grained Si3N4-Si2N2O Composite at Low Temperature

Abstract:

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The Si3N4- Si2N2O composites are fabricated with amorphous nano-sized silicon nitride powders by the liquid phase sintering (LPS) method. XRD analysis shows sintered body consists of β-Si3N4 and Si2N2O. SEM experiment conforms that the average grain size of sintered body is less than 300nm. The complex-shape gears can be formed by a sinter-forging technology when the sintering temperature is 1600°C and the superplastic forging temperature is only 1550°C. Rod-shaped grains aligned along the perpendicular direction of pressure and the mechanical properties increase about 10% after the materials were forged.

Info:

Periodical:

Materials Science Forum (Volumes 551-552)

Edited by:

K.F. Zhang

Pages:

487-490

DOI:

10.4028/www.scientific.net/MSF.551-552.487

Citation:

J. T. Luo and Q. Zhang, "Superplastic Sinter-Forging of Fine-Grained Si3N4-Si2N2O Composite at Low Temperature", Materials Science Forum, Vols. 551-552, pp. 487-490, 2007

Online since:

July 2007

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Price:

$35.00

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