Sintering of β-Si3N4 Powder Derived by SHS

Journal of Inorganic Materials

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Sintering of β-Si₃N₄ Powder Derived by SHS

JIANG Jiu-Xin¹; WANG Pei-Ling¹; CHENG Yi-Bing²; CHEN Wei-Wu¹; ZHUANG Han-Rui¹; YAN Dong-Sheng¹

1.State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Science; Shanghai 200050; China; 2.School of Physics and Materials Engineering; Monash University; Clayton; Victoria; 3800; Australia

Received:2003-10-14 Revised:2003-11-28 Published:2004-11-20 Online:2004-11-20

Abstract

Abstract: The sintering of β-Si₃N₄ powder synthesized by self-propagating high-temperature synthesis was studied with the addition of MgO, Al₂O₃, Y₂O₃ as sintering additives. MgO was found to
be the effective sintering aids, and β-Si₃N₄ could be densified at 1600℃ under 20MPa with the addition of 10wt% MgO. XRD results showed that the additives did not react with β-Si3N4,
existing in glassy phase of the sintered sample, with the exception of Al₂O₃, which reacted with β-Si₃N₄ to form β -Sialon phase. The samples with MgO added had better mechanical properties
than that of samples doped with Y₂O₃ and Al₂O₃.

Key words: SHS, β-Si₃N₄, sintering process, sintering aids, mechanical properties

CLC Number:

TQ174

JIANG Jiu-Xin,WANG Pei-Ling,CHENG Yi-Bing,CHEN Wei-Wu,ZHUANG Han-Rui,YAN Dong-Sheng. Sintering of β-Si₃N₄ Powder Derived by SHS[J]. Journal of Inorganic Materials.

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Sintering of β-Si₃N₄ Powder Derived by SHS

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