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Self-reinforced Y-α-sialon ceramics with barium.aluminosilicate as an additive

Published online by Cambridge University Press:  03 March 2011

Feng Ye ,
Mikio Iwasa ,
Caili Su  and
Sheng Chen
Feng Ye*
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
Mikio Iwasa
Affiliation:
National Institute of Advanced Industrial Science and Technology, AIST Kansai, Ikeda, Osaka 563–8577, Japan
Caili Su
Affiliation:
National Institute of Advanced Industrial Science and Technology, AIST Kansai, Ikeda, Osaka 563–8577, Japan
Sheng Chen
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
*
a)Address all correspondence to this author.
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Abstract

Y-α-sialons (Y0.333Si10Al2ON15) were prepared by hot pressing using 5 wt.% BaAl2Si2O8 as an additive. The results showed that barium aluminosilicate not only.served as a liquid-phase sintering aid to promote densification, but also facilitated the.development of elongated α-sialon grains. The obtained self-toughened α-sialon was.both hard and tough. The Vickers hardness, flexural strength, and fracture toughness.are 18.9 GPa, 802 MPa, and 6.0 Mpam1/2, respectively. Post heat treatment could.promote the growth of elongated α-sialon grains, hence further increasing its.toughness.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 10 , October 2003 , pp. 2446 - 2450
Copyright
Copyright © Materials Research Society 2003

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