Evaluation of Thermal Shock Resistance of Ceramics. 1st Report. A Novel Quench Test Technique.

The effect of 1mol% calcia additive on sintering of yttria was investigated, and a yttria with elongated grains and micro-pores was developed in present work. The results showed that in calcia added samples heated at 1600°C, calcia contained yttria solid solution grains were formed and distributed among pure yttria grains. With the prolonging soaking time, they were concentrated into rod- or plate-like elongated grains and some of them were embedded into pure coarse yttria grains. Furthermore, in calcia added samples, grain growth was much faster and lots of micro-pores were left in coarse pure yttria grains. Water quench test revealed that thermal shock resistance of calcia added sample was greatly improved by elongated grains and micro-pores.

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Thermal Shock Resistance of Si3N4/hBN Ceramic Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.784.73 ◽

2018 ◽

Vol 784 ◽

pp. 73-78

Author(s):

Alexandra Kovalčíková ◽

Michal Húlan ◽

Richard Sedlák ◽

Martin Fides ◽

Csaba Balázsi ◽

...

Keyword(s):

Critical Temperature ◽

Silicon Nitride ◽

Thermal Shock ◽

Thermal Shock Resistance ◽

Hexagonal Boron Nitride ◽

Hot Isostatic Pressing ◽

Ceramic Composites ◽

Test Method ◽

Shock Resistance ◽

Quench Test

Si3N4/hBN composites were fabricated by hot isostatic pressing at 1700°C/3h with 1, 3 and 5 wt. % micro-sized or nano-sized hexagonal boron nitride particles added to silicon nitride matrix. An indentation quench test method was used for estimation of thermal shock resistance of monolithic Si3N4and Si3N4/hBN composites. Thermal shock resistance of the composites increased with the increase of size and volume of hBN particles. The critical temperature difference for the composites with micro-sized hBN was significantly higher (over 900°C) compared to the monolithic silicon nitride (580°C).

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Prediction of Thermal Shock Resistance of Components Using the Indentation-Quench Test

Ceramic Materials and Components for Engines ◽

10.1002/9783527612765.ch22 ◽

2007 ◽

pp. 127-132 ◽

Cited By ~ 1

Author(s):

M. Collin ◽

D. Rowcliffe

Keyword(s):

Thermal Shock ◽

Thermal Shock Resistance ◽

Shock Resistance ◽

Quench Test

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Thermal shock properties of glass-ceramics synthesized from a glass frit

Science of Sintering ◽

10.2298/sos1702139c ◽

2017 ◽

Vol 49 (2) ◽

pp. 139-147 ◽

Cited By ~ 1

Author(s):

Mira Cocic ◽

Branko Matovic ◽

Milica Posarac ◽

Tatjana Volkov-Husovic ◽

Jelena Majstorovic ◽

...

Keyword(s):

Thermal Shock ◽

Thermal Shock Resistance ◽

Glass Ceramics ◽

Glass Frit ◽

Test Image ◽

X Ray ◽

Ultrasonic Measurements ◽

Water Quench ◽

Shock Resistance ◽

Quench Test

In this study, the behavior of glass-ceramics synthesized from a glass frit of FFW (Final Flotation Waste) originated from the RTB Bor Company was investigated. Thermal shock resistance was monitored in order to assess the possibility of application of such waste material. Thermal shock of the samples was conducted using water quench test. Image analysis and ultrasonic measurements were used as nondestructive methods for quantification of thermal shock damage at the surface and in the bulk of the specimens. Phase composition of samples was determined by X-ray powder diffraction (XRPD). The degradation level of samples was about 43 % after 20 cycles of water quench tests. The results pointed out that glass-ceramic material exhibited good thermal shock resistance.

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