Effect of additive on the microstructure and mechanical properties of in situ SiC-BN composites

Zhihua Yang; Dechang Jia; Yu Zhou; Ling Lin

Effect of additive on the microstructure and mechanical properties of in situ SiC-BN composites

Zhihua Yang^*
, Dechang Jia
, Yu Zhou
, Ling Lin

^*Corresponding author for this work

Harbin Institute of Technology

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

Abstract

The effect of the addition of Al₂O₃ and Y ₂O₃ additives on the microstructure and mechanical properties of in situ SiC-BN composites has been investigated. When additives (10 wt%) were added, the in situ reaction among Si₃N₄, B₄C and C started at 1400°C, and completed at 1700°C. However the reaction couldn't entirely completed even the temperature up to 1900°C without Al₂O₃-Y₂O₃ additives. Al₂O₃-Y₂O₃ could react and form liquid yttrium aluminium garnet, and the additive formed a Y-Al-Si-O liquid phase with SiO₂ present in surface of Si₃N₄ or SiC raw powders. The liquid phase could accelerate the in situ reaction, and improve the density of composites. When the composites have the same content of SiC and BN, the densities and mechanical properties of the composites with additive were higher than the composites without additive.

Original language	English
Pages (from-to)	546-547
Number of pages	2
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	34
Issue number	SUPPL. 1 PART 1
State	Published - Jun 2005

Keywords

Additive
Boron nitride
Microstructure
Silicon carbide

Cite this

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title = "Effect of additive on the microstructure and mechanical properties of in situ SiC-BN composites",

abstract = "The effect of the addition of Al2O3 and Y 2O3 additives on the microstructure and mechanical properties of in situ SiC-BN composites has been investigated. When additives (10 wt\%) were added, the in situ reaction among Si3N4, B4C and C started at 1400°C, and completed at 1700°C. However the reaction couldn't entirely completed even the temperature up to 1900°C without Al2O3-Y2O3 additives. Al2O3-Y2O3 could react and form liquid yttrium aluminium garnet, and the additive formed a Y-Al-Si-O liquid phase with SiO2 present in surface of Si3N4 or SiC raw powders. The liquid phase could accelerate the in situ reaction, and improve the density of composites. When the composites have the same content of SiC and BN, the densities and mechanical properties of the composites with additive were higher than the composites without additive.",

keywords = "Additive, Boron nitride, Microstructure, Silicon carbide",

author = "Zhihua Yang and Dechang Jia and Yu Zhou and Ling Lin",

year = "2005",

month = jun,

language = "英语",

volume = "34",

pages = "546--547",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

issn = "1002-185X",

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number = "SUPPL. 1 PART 1",

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TY - JOUR

T1 - Effect of additive on the microstructure and mechanical properties of in situ SiC-BN composites

AU - Yang, Zhihua

AU - Jia, Dechang

AU - Zhou, Yu

AU - Lin, Ling

PY - 2005/6

Y1 - 2005/6

N2 - The effect of the addition of Al2O3 and Y 2O3 additives on the microstructure and mechanical properties of in situ SiC-BN composites has been investigated. When additives (10 wt%) were added, the in situ reaction among Si3N4, B4C and C started at 1400°C, and completed at 1700°C. However the reaction couldn't entirely completed even the temperature up to 1900°C without Al2O3-Y2O3 additives. Al2O3-Y2O3 could react and form liquid yttrium aluminium garnet, and the additive formed a Y-Al-Si-O liquid phase with SiO2 present in surface of Si3N4 or SiC raw powders. The liquid phase could accelerate the in situ reaction, and improve the density of composites. When the composites have the same content of SiC and BN, the densities and mechanical properties of the composites with additive were higher than the composites without additive.

AB - The effect of the addition of Al2O3 and Y 2O3 additives on the microstructure and mechanical properties of in situ SiC-BN composites has been investigated. When additives (10 wt%) were added, the in situ reaction among Si3N4, B4C and C started at 1400°C, and completed at 1700°C. However the reaction couldn't entirely completed even the temperature up to 1900°C without Al2O3-Y2O3 additives. Al2O3-Y2O3 could react and form liquid yttrium aluminium garnet, and the additive formed a Y-Al-Si-O liquid phase with SiO2 present in surface of Si3N4 or SiC raw powders. The liquid phase could accelerate the in situ reaction, and improve the density of composites. When the composites have the same content of SiC and BN, the densities and mechanical properties of the composites with additive were higher than the composites without additive.

KW - Additive

KW - Boron nitride

KW - Microstructure

KW - Silicon carbide

UR - https://www.scopus.com/pages/publications/33845340809

M3 - 文章

AN - SCOPUS:33845340809

SN - 1002-185X

VL - 34

SP - 546

EP - 547

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - SUPPL. 1 PART 1

ER -

Effect of additive on the microstructure and mechanical properties of in situ SiC-BN composites

Abstract

Keywords

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