Properties of Si 3N 4-BN composite ceramics by spark plasma sintering

Hailong Qiu; Juan Zhang; Hongmin Zhu

Properties of Si ₃N ₄-BN composite ceramics by spark plasma sintering

Hailong Qiu, Juan Zhang, Hongmin Zhu

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

Abstract

Dense Si ₃ N ₄ - BN compsite ceramics were fabrica-ted by spark plasma-sintering at 1 500, 1 600 and 1 650 °C under 50 MP a for 5 min using Si ₃N ₄ and BN powders as starting materials and 2 mass% Al ₂0 ₃ and 6 mass% Y ₂0 ₃ as sintering additives. The volume fracion ofBN n Si ₃N ₄ -BN composite powders was chosen as 10%, 20%, and 30%, respectively. The results of XRD and SEM show hat a-Si ₃N ₄ completely urns nto sintered at 1 650 °C; the addition of BN hinders the growth of Si ₃N ₄ grains, refining he structure; Vickers hardness and fracture toughness of the composite ceramics decrease with the increase of BN content.

Original language	English
Pages (from-to)	36-39
Number of pages	4
Journal	China's Refractories
Volume	21
Issue number	1
Publication status	Published - 2012 Aug 6
Externally published	Yes

Keywords

Mechanical properties
Silicon nitride;Boron nitride;Composite ceramics
Spark plasma sintering

ASJC Scopus subject areas

Ceramics and Composites

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title = "Properties of Si 3N 4-BN composite ceramics by spark plasma sintering",

abstract = "Dense Si 3 N 4 - BN compsite ceramics were fabrica-ted by spark plasma-sintering at 1 500, 1 600 and 1 650 °C under 50 MP a for 5 min using Si 3N 4 and BN powders as starting materials and 2 mass% Al 20 3 and 6 mass% Y 20 3 as sintering additives. The volume fracion ofBN n Si 3N 4 -BN composite powders was chosen as 10%, 20%, and 30%, respectively. The results of XRD and SEM show hat a-Si 3N 4 completely urns nto sintered at 1 650 °C; the addition of BN hinders the growth of Si 3N 4 grains, refining he structure; Vickers hardness and fracture toughness of the composite ceramics decrease with the increase of BN content.",

keywords = "Mechanical properties, Silicon nitride;Boron nitride;Composite ceramics, Spark plasma sintering",

author = "Hailong Qiu and Juan Zhang and Hongmin Zhu",

year = "2012",

month = aug,

day = "6",

language = "English",

volume = "21",

pages = "36--39",

journal = "China's Refractories",

issn = "1004-4493",

publisher = "The Editorial Committee of China's Refractories",

number = "1",

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TY - JOUR

T1 - Properties of Si 3N 4-BN composite ceramics by spark plasma sintering

AU - Qiu, Hailong

AU - Zhang, Juan

AU - Zhu, Hongmin

PY - 2012/8/6

Y1 - 2012/8/6

N2 - Dense Si 3 N 4 - BN compsite ceramics were fabrica-ted by spark plasma-sintering at 1 500, 1 600 and 1 650 °C under 50 MP a for 5 min using Si 3N 4 and BN powders as starting materials and 2 mass% Al 20 3 and 6 mass% Y 20 3 as sintering additives. The volume fracion ofBN n Si 3N 4 -BN composite powders was chosen as 10%, 20%, and 30%, respectively. The results of XRD and SEM show hat a-Si 3N 4 completely urns nto sintered at 1 650 °C; the addition of BN hinders the growth of Si 3N 4 grains, refining he structure; Vickers hardness and fracture toughness of the composite ceramics decrease with the increase of BN content.

AB - Dense Si 3 N 4 - BN compsite ceramics were fabrica-ted by spark plasma-sintering at 1 500, 1 600 and 1 650 °C under 50 MP a for 5 min using Si 3N 4 and BN powders as starting materials and 2 mass% Al 20 3 and 6 mass% Y 20 3 as sintering additives. The volume fracion ofBN n Si 3N 4 -BN composite powders was chosen as 10%, 20%, and 30%, respectively. The results of XRD and SEM show hat a-Si 3N 4 completely urns nto sintered at 1 650 °C; the addition of BN hinders the growth of Si 3N 4 grains, refining he structure; Vickers hardness and fracture toughness of the composite ceramics decrease with the increase of BN content.

KW - Mechanical properties

KW - Silicon nitride;Boron nitride;Composite ceramics

KW - Spark plasma sintering

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