Highly texturing β-sialon via strong magnetic field alignment

Xinwen Zhu, Tohru Suzuki, Tetsuo Uchikoshi, Yoshio Sakka

Research output: Contribution to journalArticle

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-Si 3 N 4 , Al 2 O 3 , and AlN as the starting materials. It is found that the β-Si 3 N 4 crystal exhibits a substantially stronger orientation ability than the α-Si 3 N 4 crystal regardless of the Si 3 N 4 raw powders in the magnetic field of 12 T. The β-raw powder produces a highly a, b-axis-oriented β-Si 3 N 4 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-Si 3 N 4 in the green body. In contrast, the α-raw powder leads to a faster transformation rate of α/β-Si 3 N 4 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
Externally publishedYes

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Texturing
Powders
Magnetic fields
Sintering
Crystals
Crystal orientation
Casting
Textures

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Highly texturing β-sialon via strong magnetic field alignment. / Zhu, Xinwen; Suzuki, Tohru; Uchikoshi, Tetsuo; Sakka, Yoshio.

In: Journal of the American Ceramic Society, Vol. 91, No. 2, 01.02.2008, p. 620-623.

Research output: Contribution to journalArticle

Zhu, Xinwen ; Suzuki, Tohru ; Uchikoshi, Tetsuo ; Sakka, Yoshio. / Highly texturing β-sialon via strong magnetic field alignment. In: Journal of the American Ceramic Society. 2008 ; Vol. 91, No. 2. pp. 620-623.
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