Effect of applied pressure and sintering aid on phase separation and crystallization behavior of amorphous Si3N4-BN composite powder

Hironori Kugimoto; Masato Uehara; Naoya Enomoto; Junichi Hojo

doi:10.2497/jjspm.49.491

Effect of applied pressure and sintering aid on phase separation and crystallization behavior of amorphous Si₃N₄-BN composite powder

Hironori Kugimoto, Masato Uehara, Naoya Enomoto, Junichi Hojo

Applied Fine Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Si₃N₄-BN nanocomposites are formed via phase separation and crystallization of amorphous Si₃N₄-BN composite powder during sintering. Amorphous Si₃N₄-BN composite powders were prepared by a vapor phase reaction method. To clarify the effect of applied pressure and sintering aid on the phase separation and crystallization behavior, the composite powders were hot-pressed and pressurelessly sintered with and without Y₂O₃-Al₂O₃ sintering aid. Si₃N₄ crystallized into α-phase at 1600°C without sintering aid, and into β-phase at 1400°C with sintering aid. It was found that the crystallization of Si₃N₄ and BN was promoted by applied pressure and sintering aid. On the other hand, the phase separation of BN from Si₃N₄ occurred around 1400°C regardless of applied pressure and sintering aid.

Original language	English
Pages (from-to)	491-495
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	49
Issue number	6
DOIs	https://doi.org/10.2497/jjspm.49.491
Publication status	Published - Jun 2002

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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Effect of applied pressure and sintering aid on phase separation and crystallization behavior of amorphous Si₃N₄-BN composite powder. / Kugimoto, Hironori; Uehara, Masato; Enomoto, Naoya; Hojo, Junichi.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 49, No. 6, 06.2002, p. 491-495.

Research output: Contribution to journal › Article › peer-review

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title = "Effect of applied pressure and sintering aid on phase separation and crystallization behavior of amorphous Si3N4-BN composite powder",

abstract = "Si3N4-BN nanocomposites are formed via phase separation and crystallization of amorphous Si3N4-BN composite powder during sintering. Amorphous Si3N4-BN composite powders were prepared by a vapor phase reaction method. To clarify the effect of applied pressure and sintering aid on the phase separation and crystallization behavior, the composite powders were hot-pressed and pressurelessly sintered with and without Y2O3-Al2O3 sintering aid. Si3N4 crystallized into α-phase at 1600°C without sintering aid, and into β-phase at 1400°C with sintering aid. It was found that the crystallization of Si3N4 and BN was promoted by applied pressure and sintering aid. On the other hand, the phase separation of BN from Si3N4 occurred around 1400°C regardless of applied pressure and sintering aid.",

author = "Hironori Kugimoto and Masato Uehara and Naoya Enomoto and Junichi Hojo",

year = "2002",

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T1 - Effect of applied pressure and sintering aid on phase separation and crystallization behavior of amorphous Si3N4-BN composite powder

AU - Kugimoto, Hironori

AU - Uehara, Masato

AU - Enomoto, Naoya

AU - Hojo, Junichi

PY - 2002/6

Y1 - 2002/6

N2 - Si3N4-BN nanocomposites are formed via phase separation and crystallization of amorphous Si3N4-BN composite powder during sintering. Amorphous Si3N4-BN composite powders were prepared by a vapor phase reaction method. To clarify the effect of applied pressure and sintering aid on the phase separation and crystallization behavior, the composite powders were hot-pressed and pressurelessly sintered with and without Y2O3-Al2O3 sintering aid. Si3N4 crystallized into α-phase at 1600°C without sintering aid, and into β-phase at 1400°C with sintering aid. It was found that the crystallization of Si3N4 and BN was promoted by applied pressure and sintering aid. On the other hand, the phase separation of BN from Si3N4 occurred around 1400°C regardless of applied pressure and sintering aid.

AB - Si3N4-BN nanocomposites are formed via phase separation and crystallization of amorphous Si3N4-BN composite powder during sintering. Amorphous Si3N4-BN composite powders were prepared by a vapor phase reaction method. To clarify the effect of applied pressure and sintering aid on the phase separation and crystallization behavior, the composite powders were hot-pressed and pressurelessly sintered with and without Y2O3-Al2O3 sintering aid. Si3N4 crystallized into α-phase at 1600°C without sintering aid, and into β-phase at 1400°C with sintering aid. It was found that the crystallization of Si3N4 and BN was promoted by applied pressure and sintering aid. On the other hand, the phase separation of BN from Si3N4 occurred around 1400°C regardless of applied pressure and sintering aid.

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