Texturing Ca-α-sialon via strong magnetic field alignment

Xinwen Zhu, Tohru Suzuki, Tetsuo Uchikoshi, Yoshio Sakka

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper reports a dense textured single Ca-α-sialon fabricated by strong magnetic field alignment (SMFA) during non-aqueous slip casting of α-Si 3 N 4 , CaCO 3 , Al 2 O 3 and AIN starting powders, followed by reaction pres-sureless sintering at 1800°C, XRD analysis reveals that the orientation of the α-Si 3 N 4 crystals occurs with the c-axis perpendicular to the magnetic field during slip casting. It is shown that the formation of the single Ca-α-sialon is complete within 5 min and nearly complete densification is achieved within 60 min. SEM observation reveals that the textured Ca-α-sialon is featured by the long-axis (c-axis) of large elongated grains perpendicular to the magnetic field. The texturing mechanism is attributed to the heterogeneous nucleation and epitaxially elongated growth on the initially oriented α-Si 3 N 4 seeds. The prolonged sintering leads to a higher orientation as a result of the promoted grain growth.

Original languageEnglish
Pages (from-to)701-705
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume115
Issue number1347
DOIs
Publication statusPublished - 2007 Jan 1
Externally publishedYes

Fingerprint

sialon
Texturing
slip casting
alignment
Magnetic fields
sintering
Casting
Sintering
magnetic fields
densification
Grain growth
Densification
Crystal orientation
Powders
Seed
seeds
Nucleation
nucleation
Crystals
Scanning electron microscopy

Keywords

  • Ca-α-sialon
  • Pressurelss sintering
  • Slip casting
  • Strong magnetic field
  • Texture

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Texturing Ca-α-sialon via strong magnetic field alignment. / Zhu, Xinwen; Suzuki, Tohru; Uchikoshi, Tetsuo; Sakka, Yoshio.

In: Journal of the Ceramic Society of Japan, Vol. 115, No. 1347, 01.01.2007, p. 701-705.

Research output: Contribution to journalArticle

Zhu, Xinwen ; Suzuki, Tohru ; Uchikoshi, Tetsuo ; Sakka, Yoshio. / Texturing Ca-α-sialon via strong magnetic field alignment. In: Journal of the Ceramic Society of Japan. 2007 ; Vol. 115, No. 1347. pp. 701-705.
@article{b0a436e085144d7996fc4b792c044f97,
title = "Texturing Ca-α-sialon via strong magnetic field alignment",
abstract = "This paper reports a dense textured single Ca-α-sialon fabricated by strong magnetic field alignment (SMFA) during non-aqueous slip casting of α-Si 3 N 4 , CaCO 3 , Al 2 O 3 and AIN starting powders, followed by reaction pres-sureless sintering at 1800°C, XRD analysis reveals that the orientation of the α-Si 3 N 4 crystals occurs with the c-axis perpendicular to the magnetic field during slip casting. It is shown that the formation of the single Ca-α-sialon is complete within 5 min and nearly complete densification is achieved within 60 min. SEM observation reveals that the textured Ca-α-sialon is featured by the long-axis (c-axis) of large elongated grains perpendicular to the magnetic field. The texturing mechanism is attributed to the heterogeneous nucleation and epitaxially elongated growth on the initially oriented α-Si 3 N 4 seeds. The prolonged sintering leads to a higher orientation as a result of the promoted grain growth.",
keywords = "Ca-α-sialon, Pressurelss sintering, Slip casting, Strong magnetic field, Texture",
author = "Xinwen Zhu and Tohru Suzuki and Tetsuo Uchikoshi and Yoshio Sakka",
year = "2007",
month = "1",
day = "1",
doi = "10.2109/jcersj2.115.701",
language = "English",
volume = "115",
pages = "701--705",
journal = "Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan",
issn = "1882-0743",
publisher = "Ceramic Society of Japan/Nippon Seramikkusu Kyokai",
number = "1347",

}

TY - JOUR

T1 - Texturing Ca-α-sialon via strong magnetic field alignment

AU - Zhu, Xinwen

AU - Suzuki, Tohru

AU - Uchikoshi, Tetsuo

AU - Sakka, Yoshio

PY - 2007/1/1

Y1 - 2007/1/1

N2 - This paper reports a dense textured single Ca-α-sialon fabricated by strong magnetic field alignment (SMFA) during non-aqueous slip casting of α-Si 3 N 4 , CaCO 3 , Al 2 O 3 and AIN starting powders, followed by reaction pres-sureless sintering at 1800°C, XRD analysis reveals that the orientation of the α-Si 3 N 4 crystals occurs with the c-axis perpendicular to the magnetic field during slip casting. It is shown that the formation of the single Ca-α-sialon is complete within 5 min and nearly complete densification is achieved within 60 min. SEM observation reveals that the textured Ca-α-sialon is featured by the long-axis (c-axis) of large elongated grains perpendicular to the magnetic field. The texturing mechanism is attributed to the heterogeneous nucleation and epitaxially elongated growth on the initially oriented α-Si 3 N 4 seeds. The prolonged sintering leads to a higher orientation as a result of the promoted grain growth.

AB - This paper reports a dense textured single Ca-α-sialon fabricated by strong magnetic field alignment (SMFA) during non-aqueous slip casting of α-Si 3 N 4 , CaCO 3 , Al 2 O 3 and AIN starting powders, followed by reaction pres-sureless sintering at 1800°C, XRD analysis reveals that the orientation of the α-Si 3 N 4 crystals occurs with the c-axis perpendicular to the magnetic field during slip casting. It is shown that the formation of the single Ca-α-sialon is complete within 5 min and nearly complete densification is achieved within 60 min. SEM observation reveals that the textured Ca-α-sialon is featured by the long-axis (c-axis) of large elongated grains perpendicular to the magnetic field. The texturing mechanism is attributed to the heterogeneous nucleation and epitaxially elongated growth on the initially oriented α-Si 3 N 4 seeds. The prolonged sintering leads to a higher orientation as a result of the promoted grain growth.

KW - Ca-α-sialon

KW - Pressurelss sintering

KW - Slip casting

KW - Strong magnetic field

KW - Texture

UR - http://www.scopus.com/inward/record.url?scp=44849107686&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44849107686&partnerID=8YFLogxK

U2 - 10.2109/jcersj2.115.701

DO - 10.2109/jcersj2.115.701

M3 - Article

AN - SCOPUS:44849107686

VL - 115

SP - 701

EP - 705

JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan

JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan

SN - 1882-0743

IS - 1347

ER -