Mechanical properties of nano-grain SiO2 glass prepared by spark plasma sintering

Zhenhua He; Hirokazu Katsui; Takashi Goto

doi:10.1016/j.jeurceramsoc.2016.09.020

Mechanical properties of nano-grain SiO₂ glass prepared by spark plasma sintering

Zhenhua He, Hirokazu Katsui, Takashi Goto

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

6 Citations (Scopus)

Abstract

Silicon carbide (SiC) layers were deposited on silica (SiO₂) glass powder by rotary chemical vapor deposition (RCVD) to form SiO₂ glass (core)/SiC (shell) powder; this powder was consolidated by spark plasma sintering (SPS). SiO₂ glass powder with a particle size of 250 nm was coated with 5–10-nm-thick SiC layers. The resultant SiO₂ glass (core)/SiC (shell) powder was consolidated to form a nano-grain SiO₂ glass composite at a relative density above 90% by SPS in the sintering temperature range of 1573–1823 K. The Vickers hardness and fracture toughness of the SiO₂ glass composite at 1723 K were found to be 14.2 GPa and 5.4 MPa m^1/2, respectively.

Original language	English
Pages (from-to)	721-725
Number of pages	5
Journal	Journal of the European Ceramic Society
Volume	37
Issue number	2
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2016.09.020
Publication status	Published - 2017 Feb 1

Keywords

High fracture toughness
High hardness
Rotary chemical vapor deposition
SiC-coated SiO glass powder
Spark plasma sintering

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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title = "Mechanical properties of nano-grain SiO2 glass prepared by spark plasma sintering",

abstract = "Silicon carbide (SiC) layers were deposited on silica (SiO2) glass powder by rotary chemical vapor deposition (RCVD) to form SiO2 glass (core)/SiC (shell) powder; this powder was consolidated by spark plasma sintering (SPS). SiO2 glass powder with a particle size of 250 nm was coated with 5–10-nm-thick SiC layers. The resultant SiO2 glass (core)/SiC (shell) powder was consolidated to form a nano-grain SiO2 glass composite at a relative density above 90% by SPS in the sintering temperature range of 1573–1823 K. The Vickers hardness and fracture toughness of the SiO2 glass composite at 1723 K were found to be 14.2 GPa and 5.4 MPa m1/2, respectively.",

keywords = "High fracture toughness, High hardness, Rotary chemical vapor deposition, SiC-coated SiO glass powder, Spark plasma sintering",

author = "Zhenhua He and Hirokazu Katsui and Takashi Goto",

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AU - He, Zhenhua

AU - Katsui, Hirokazu

AU - Goto, Takashi

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Y1 - 2017/2/1

N2 - Silicon carbide (SiC) layers were deposited on silica (SiO2) glass powder by rotary chemical vapor deposition (RCVD) to form SiO2 glass (core)/SiC (shell) powder; this powder was consolidated by spark plasma sintering (SPS). SiO2 glass powder with a particle size of 250 nm was coated with 5–10-nm-thick SiC layers. The resultant SiO2 glass (core)/SiC (shell) powder was consolidated to form a nano-grain SiO2 glass composite at a relative density above 90% by SPS in the sintering temperature range of 1573–1823 K. The Vickers hardness and fracture toughness of the SiO2 glass composite at 1723 K were found to be 14.2 GPa and 5.4 MPa m1/2, respectively.

AB - Silicon carbide (SiC) layers were deposited on silica (SiO2) glass powder by rotary chemical vapor deposition (RCVD) to form SiO2 glass (core)/SiC (shell) powder; this powder was consolidated by spark plasma sintering (SPS). SiO2 glass powder with a particle size of 250 nm was coated with 5–10-nm-thick SiC layers. The resultant SiO2 glass (core)/SiC (shell) powder was consolidated to form a nano-grain SiO2 glass composite at a relative density above 90% by SPS in the sintering temperature range of 1573–1823 K. The Vickers hardness and fracture toughness of the SiO2 glass composite at 1723 K were found to be 14.2 GPa and 5.4 MPa m1/2, respectively.

KW - High fracture toughness

KW - High hardness

KW - Rotary chemical vapor deposition

KW - SiC-coated SiO glass powder

KW - Spark plasma sintering

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