Highly texturing β-sialon via strong magnetic field alignment

Xinwen Zhu, Tohru S. Suzuki, Tetsuo Uchikoshi, Yoshio Sakka

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15 Citations (Scopus)

Abstract

This paper reports the texturing behavior of β-sialon by strong magnetic field alignment (SMFA) during slip casting, followed by reaction pressureless sintering, using either α or β-Si3N 4, Al2O3, and AlN as the starting materials. It is found that the β-Si3N4 crystal exhibits a substantially stronger orientation ability than the α-Si3N 4 crystal regardless of the Si3N4 raw powders in the magnetic field of 12 T. The β-raw powder produces a highly a, b-axis-oriented β-Si3N4 green body with a Lotgering orientation factor of up to 0.97. During sintering, the β-raw powder allows the a, b-axis-oriented β-sialon to retain the Lotgering orientation factor similar to and even higher than that of β-Si3N4 in the green body. In contrast, the α-raw powder leads to a faster transformation rate of α/β-Si3N4 to β-sialon but a substantially lower texture in β-sialon. The results indicate that the use of the β-raw powder is more efficient for producing highly textured β-sialon via SMFA than that of the α-raw powder as well as the prolonged sintering.

Original languageEnglish
Pages (from-to)620-623
Number of pages4
JournalJournal of the American Ceramic Society
Volume91
Issue number2
DOIs
Publication statusPublished - 2008 Feb 1

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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