Effect of alkaline earth additives on the flexural strength of silicon oxycarbide-bonded silicon carbide ceramics

Jung Hye Eom; Young Wook Kim; Byung Jun Jung

doi:10.1016/j.ceramint.2012.08.064

Effect of alkaline earth additives on the flexural strength of silicon oxycarbide-bonded silicon carbide ceramics

Jung Hye Eom, Young Wook Kim, Byung Jun Jung

Department of Materials Science and Engineering

University of Seoul

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

14 Scopus citations

Abstract

A series of silicon oxycarbide (SiOC)-bonded SiC ceramics were fabricated from SiC-polysiloxane-alkaline earth (AE) alkoxide mixtures at a temperature as low as 800 °C to investigate the compositional effect on the flexural strength of SiOC-bonded SiC ceramics. The addition of AE elements increased the flexural strength of SiOC-bonded SiC ceramics by 14-65% depending on the composition. The flexural strength versus the Ba/(Ba+Si) mole ratio curve had a maximum in that there was a small composition range for which an optimum flexural strength occurred. The best result, a flexural strength of >150 MPa, was obtained when the ratio was ∼0.01.

Original language	English
Pages (from-to)	2083-2091
Number of pages	9
Journal	Ceramics International
Volume	39
Issue number	2
DOIs	https://doi.org/10.1016/j.ceramint.2012.08.064
State	Published - Mar 2013

Keywords

A. Precursors: organic
B. Porosity
D. SiC
Silicon oxycarbide

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10.1016/j.ceramint.2012.08.064

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title = "Effect of alkaline earth additives on the flexural strength of silicon oxycarbide-bonded silicon carbide ceramics",

abstract = "A series of silicon oxycarbide (SiOC)-bonded SiC ceramics were fabricated from SiC-polysiloxane-alkaline earth (AE) alkoxide mixtures at a temperature as low as 800 °C to investigate the compositional effect on the flexural strength of SiOC-bonded SiC ceramics. The addition of AE elements increased the flexural strength of SiOC-bonded SiC ceramics by 14-65% depending on the composition. The flexural strength versus the Ba/(Ba+Si) mole ratio curve had a maximum in that there was a small composition range for which an optimum flexural strength occurred. The best result, a flexural strength of >150 MPa, was obtained when the ratio was ∼0.01.",

keywords = "A. Precursors: organic, B. Porosity, D. SiC, Silicon oxycarbide",

author = "Eom, {Jung Hye} and Kim, {Young Wook} and Jung, {Byung Jun}",

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journal = "Ceramics International",

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T1 - Effect of alkaline earth additives on the flexural strength of silicon oxycarbide-bonded silicon carbide ceramics

AU - Eom, Jung Hye

AU - Kim, Young Wook

AU - Jung, Byung Jun

PY - 2013/3

Y1 - 2013/3

N2 - A series of silicon oxycarbide (SiOC)-bonded SiC ceramics were fabricated from SiC-polysiloxane-alkaline earth (AE) alkoxide mixtures at a temperature as low as 800 °C to investigate the compositional effect on the flexural strength of SiOC-bonded SiC ceramics. The addition of AE elements increased the flexural strength of SiOC-bonded SiC ceramics by 14-65% depending on the composition. The flexural strength versus the Ba/(Ba+Si) mole ratio curve had a maximum in that there was a small composition range for which an optimum flexural strength occurred. The best result, a flexural strength of >150 MPa, was obtained when the ratio was ∼0.01.

AB - A series of silicon oxycarbide (SiOC)-bonded SiC ceramics were fabricated from SiC-polysiloxane-alkaline earth (AE) alkoxide mixtures at a temperature as low as 800 °C to investigate the compositional effect on the flexural strength of SiOC-bonded SiC ceramics. The addition of AE elements increased the flexural strength of SiOC-bonded SiC ceramics by 14-65% depending on the composition. The flexural strength versus the Ba/(Ba+Si) mole ratio curve had a maximum in that there was a small composition range for which an optimum flexural strength occurred. The best result, a flexural strength of >150 MPa, was obtained when the ratio was ∼0.01.

KW - A. Precursors: organic

KW - B. Porosity

KW - D. SiC

KW - Silicon oxycarbide

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DO - 10.1016/j.ceramint.2012.08.064

M3 - Article

AN - SCOPUS:84870302028

SN - 0272-8842

VL - 39

SP - 2083

EP - 2091

JO - Ceramics International

JF - Ceramics International

IS - 2

ER -

Effect of alkaline earth additives on the flexural strength of silicon oxycarbide-bonded silicon carbide ceramics

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Keywords

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