Fabrication of Silicon Nitride-Based Nano/Nano-Composite

Abstract:

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Silicon nitride/boron nitride nano/nano-composites were prepared by high energy ball milling and spark plasma sintering. The milling promoted the amorphization of starting powders with the presence of many homogeneous distributed nanocrystalline â-Si3N4 particles; most of the BN particles were transformed into nano-size and embedded in the amorphous phase. This, combined with low sintering temperature and rapid densification rate, leads to a uniform nano/nano composite microstructure. The nano-sized BN grains with an average diameter of about 10 nm were homogeneously dispersed in nano-sized (about 70 nm) Si3N4 grain boundaries. The obtained nano/nano composite shows high hardness, high strength, high superplasticity, good heat/corrosion resistance and good tribological properties.

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Periodical:

Edited by:

Takashi Goto, Yi-Bing Cheng and Takashi Akatsu

Pages:

65-69

DOI:

10.4028/www.scientific.net/KEM.484.65

Citation:

X. Xu et al., "Fabrication of Silicon Nitride-Based Nano/Nano-Composite", Key Engineering Materials, Vol. 484, pp. 65-69, 2011

Online since:

July 2011

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$35.00

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