Synthesis of (Ca,Mg)-α-sialon from slag by self-propagating high-temperature synthesis

Weiwu Chen; Peiling Wang; Dianying Chen; Baolin Zhang; Jiuxin Jiang; Yibing Cheng; Dongsheng Yan

doi:10.1039/B200540A

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Weiwu Chen,^a Peiling Wang,^a Dianying Chen,^a Baolin Zhang,^a Jiuxin Jiang,^a Yibing Cheng^b and Dongsheng Yan^a

Author affiliations

^a The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, CAS, Shanghai, People's Republic of China

^b School of Physics and Materials Engineering, Monash University, Clayton, Victoria, Australia

Abstract

The synthesis of (Ca,Mg)-α-sialon powders using slag as a starting material by self-propagating high-temperature synthesis (SHS) is reported for the first time. The only crystalline phase detected in the synthesized products was α-sialon. The characters of the synthesized powders were observed and compared with that of conventionally hot-pressed materials. More metal cations were absorbed into the α-sialon structure of the SHS synthesized powders. Fully densified sialon ceramics can be obtained using the SHS powders by hot-pressing. The hardness and fracture toughness of the hot-pressed α-sialon ceramics reached 16 GPa and 5.1 MPa m^−1/2 respectively.

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Article information

DOI: https://doi.org/10.1039/B200540A
Article type: Paper
Submitted: 15 Jan 2002
Accepted: 13 Feb 2002
First published: 01 Mar 2002

Download Citation

J. Mater. Chem., 2002,12, 1199-1202

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