Thermal shock resistance of fibrous monolithic Si3N4/BN ceramics

Young Hag Koh; Hae Won Kim; Hyoun Ee Kim; John W. Halloran

doi:10.1016/S0955-2219(03)00644-7

Thermal shock resistance of fibrous monolithic Si₃N₄/BN ceramics

Young Hag Koh, Hae Won Kim, Hyoun Ee Kim, John W. Halloran

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

28 Citations (Scopus)

Abstract

Thermal shock resistance of fibrous monolithic Si₃N₄/BN ceramic was investigated by measuring the strength retention after varying the temperature difference (ΔT) up to 1400°C and was compared with that of monolithic Si₃N₄. Monolithic Si₃N₄ showed catastrophic drop in flexural strength above Δ T of 1000 °C, while FM showed negligible reduction in flexural strength without critical temperature difference (ΔT_c). Two parameters, such as the resistance to crack initiation (R′) and crack propagation (R?′), were used in order to explain the thermal shock behaviors of fibrous monolith and monolithic Si₃N₄. Furthermore, crack interactions during flexural testing, such as delamination cracks and crack deflection, were characterized and were related to the work-of-fracture (WOF).

Original language	English
Pages (from-to)	2339-2347
Number of pages	9
Journal	Journal of the European Ceramic Society
Volume	24
Issue number	8
DOIs	https://doi.org/10.1016/S0955-2219(03)00644-7
Publication status	Published - 2004 Jul
Externally published	Yes

Keywords

BN
Composites
Fibrous monoliths
SiN
Thermal shock

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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title = "Thermal shock resistance of fibrous monolithic Si3N4/BN ceramics",

abstract = "Thermal shock resistance of fibrous monolithic Si3N4/BN ceramic was investigated by measuring the strength retention after varying the temperature difference (ΔT) up to 1400°C and was compared with that of monolithic Si3N4. Monolithic Si3N4 showed catastrophic drop in flexural strength above Δ T of 1000 °C, while FM showed negligible reduction in flexural strength without critical temperature difference (ΔTc). Two parameters, such as the resistance to crack initiation (R′) and crack propagation (R?′), were used in order to explain the thermal shock behaviors of fibrous monolith and monolithic Si3N4. Furthermore, crack interactions during flexural testing, such as delamination cracks and crack deflection, were characterized and were related to the work-of-fracture (WOF).",

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AU - Koh, Young Hag

AU - Kim, Hae Won

AU - Kim, Hyoun Ee

AU - Halloran, John W.

PY - 2004/7

Y1 - 2004/7

N2 - Thermal shock resistance of fibrous monolithic Si3N4/BN ceramic was investigated by measuring the strength retention after varying the temperature difference (ΔT) up to 1400°C and was compared with that of monolithic Si3N4. Monolithic Si3N4 showed catastrophic drop in flexural strength above Δ T of 1000 °C, while FM showed negligible reduction in flexural strength without critical temperature difference (ΔTc). Two parameters, such as the resistance to crack initiation (R′) and crack propagation (R?′), were used in order to explain the thermal shock behaviors of fibrous monolith and monolithic Si3N4. Furthermore, crack interactions during flexural testing, such as delamination cracks and crack deflection, were characterized and were related to the work-of-fracture (WOF).

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