Effect of Aluminium on High-Energy Ball Milling and Spark Plasma Sintering of Silicon Nitride

Toshiyasu Nishimura; Xin Xu; Naoto Hirosaki; K. Kimoto; Yoo Yamamoto; Hiroaki Tanaka

doi:10.4028/www.scientific.net/KEM.287.156

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 287Effect of Aluminium on High-Energy Ball Milling...

Effect of Aluminium on High-Energy Ball Milling and Spark Plasma Sintering of Silicon Nitride

Abstract:

A commercial silicon nitride powder with oxide sintering additives was ground with high-energy ball mill to obtain nano-sized powder. Metallic aluminium powder was added as a grinding additive. Effect of high-energy ball milling was evaluated by X-ray diffraction analysis. After milling, height of background increased and peak height of silicon nitride decreased in XRD chart, which suggested that vitrification and/or decrease in grain size of silicon nitride occurred. The milled powders were sintered by spark plasma sintering system. Aluminium nitride was formed during sintering by reaction of aluminium and atmospheric nitrogen. Dense nano-ceramics, which were composed of silicon nitride and sialon, were obtained by sintering at 1550 oC.

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Periodical:

Key Engineering Materials (Volume 287)

Pages:

156-159

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.287.156

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Online since:

June 2005

Authors:

Toshiyasu Nishimura, Xin Xu, Naoto Hirosaki, K. Kimoto, Yoo Yamamoto, Hiroaki Tanaka

Keywords:

Aluminum (Al), High-Energy Ball Milling (HEM), Spark Plasma Sintering (SPS)

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