scholarly journals Young’s modulus evaluation and thermal shock behavior of a porous SiC/cordierite composite material

2015 ◽  
Vol 47 (3) ◽  
pp. 289-297
Author(s):  
M. Posarac-Markovic ◽  
J. Majstorovic ◽  
A. Devecerski ◽  
B. Matovic ◽  
T. Volkov-Husovic
Keyword(s):  
Composite Material ◽  
Thermal Shock ◽  
Young Modulus ◽  
Graphical Modeling ◽  
Graphite Content ◽  
Water Quench ◽  
Thermal Shock Behavior ◽  
Number Of Cycles ◽  
Porous Sic ◽  
Quench Test

Porous SiC/Cordierite Composite Material with graphite content (10%) was synthesized. Evaluation of Young modulus of elasticity and thermal shock behavior of these samples was presented. Thermal shock behavior was monitored using water quench test, and non destructive methods such are UPVT and image analysis were also used for accompaniment the level of destruction of the samples during water quench test. Based on the level of destruction graphical modeling of critical number of cycles was given. This approach was implemented on discussion of the influence of the graphite content on thermal stability behavior of the samples.

scholarly journals Influence of the damage level during quenching on thermal shock behavior of low cement castable

2010 ◽  
Vol 42 (2) ◽  
pp. 211-219 ◽  
Author(s):  
S. Martinovic ◽  
J. Majstorovic ◽  
V. Vidojkovic ◽  
T. Volkov-Husovic
Keyword(s):  
Image Analysis ◽  
Thermal Shock ◽  
Young Modulus ◽  
High Alumina ◽  
Strength Deterioration ◽  
Damage Level ◽  
Ultrasonic Measurements ◽  
Water Quench ◽  
Thermal Shock Behavior ◽  
Quench Test

In the recent decades, the use of unshaped monolithic refractories has been increasing greatly because of their significant advantages over other shaped refractory bricks of the same class. A low cement high alumina castable was synthetised and sintered at 1300?C in order to investigate thermal and mechanical properties, as well as thermal shock behavior. The water quench test was applied as an experimental method for thermal stability testing. Modification of the water quench test was performed by additional monitoring of the samples behavior during the water quench test such as implementation of image analysis and ultrasonic measurements. The image analysis program was applied on samples in order to measure the level of surface damage before and during the water quench test. Ultrasonic measurements were performed with the aim to measure the Young modulus of elasticity during the testing. Strength deterioration of the samples was calculated by the model based on ultrasonic velocity changes during the water quench test. The influence of monitoring the damage level before and during the quench experiment and its influence on thermal shock behavior will be discussed.

Thermal shock behavior of alumina based refractories: fracture resistance parameters and water quench test

1999 ◽  
Vol 38 (5) ◽  
pp. 372-378 ◽  
Author(s):  
T Volkov-Husović ◽  
R.M Jančić ◽  
M Cvetković ◽  
D Mitraković ◽  
Z Popović
Keyword(s):  
Thermal Shock ◽  
Fracture Resistance ◽  
Water Quench ◽  
Thermal Shock Behavior ◽  
Quench Test

scholarly journals Thermal shock resistance of ceramic fibre composites characterized by non-destructive methods

2008 ◽  
Vol 2 (2) ◽  
pp. 115-119 ◽  
Author(s):  
M. Dimitrijevic ◽  
M. Posarac ◽  
R. Jancic-Heinemman ◽  
J. Majstorovic ◽  
T. Volkov-Husovic ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Young Modulus ◽  
Test Surface ◽  
Composite Ceramics ◽  
Fibre Composites ◽  
Water Quench ◽  
Before And After ◽  
Shock Resistance ◽  
Non Destructive ◽  
Quench Test

Alumina based ceramic fibres and alumina based ceramic were used to produce composite material. Behaviour of composite ceramics after thermal shock treatments was investigated. Thermal shock of the samples was evaluated using water quench test. Surface deterioration level of samples was monitored by image analysis before and after a number of quenching cycles. Ultrasonic measurements were done on samples after quench tests. Dynamic Young modulus of elasticity and strength degradation were calculated using measured values of ultrasonic velocities. Strengths deterioration was calculated using the non-destructive measurements and correlated to degradation of surface area and number of quenches. The addition of small amount of ceramic fibres improves the strengths and diminishes the loss of mechanical properties of samples during thermal shock experiments.

scholarly journals Anisotropy analysis of low cement concrete by ultrasonic measurements and image analysis

2016 ◽  
Vol 48 (1) ◽  
pp. 57-70 ◽  
Author(s):  
Sanja Martinovic ◽  
Milica Vlahovic ◽  
Jelena Majstorovic ◽  
Tatjana Volkov-Husovic
Keyword(s):  
Image Analysis ◽  
Thermal Shock ◽  
High Alumina ◽  
Cement Concrete ◽  
Structural Anisotropy ◽  
Ultrasonic Measurements ◽  
Water Quench ◽  
Different Temperatures ◽  
Shock Resistance ◽  
Quench Test

The analized material was high alumina low cement castable sintered at three different temperatures. Influence of initial material anisotropy on the thermal shock resistance as well as changes of anisotropy level during the thermal shock were studied. Water quench test was used as an experimental method for the thermal stability testing. Surface anisotropy was analysed by image analysis and structural anisotropy using ultrasonic measurements. The results pointed out that the highest homogeinity and the lowest surface and structural anisotropy was for the samples sintered at 1600?C. Surface anistoropy had prevailing infuence on behavior of material during the thermal shock, but the structural anisotropy should not be neglected.

Thermal Shock Behavior of NITE-Porous SiC Ceramics

2009 ◽  
pp. 89-94
Author(s):  
Yi-Hyun Park ◽  
Joon-Soo Park ◽  
Tatsuya Hinoki ◽  
Akira Kohyama
Keyword(s):  
Thermal Shock ◽  
Sic Ceramics ◽  
Thermal Shock Behavior ◽  
Porous Sic

Water Quench Test for Thermal Shock Resistance of Porous Ceramics

2003 ◽  
Vol 2003 (0) ◽  
pp. 701-702
Author(s):  
Akihiko SUZUKI ◽  
Toshio SAKUMA ◽  
Nagatoshi OKABE ◽  
Masahiro ASAYAMA ◽  
Takuma MAKINO ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Porous Ceramics ◽  
Water Quench ◽  
Shock Resistance ◽  
Quench Test

Preparation of Yttria with Elongated Grains and Micro-Pores

2011 ◽  
Vol 197-198 ◽  
pp. 425-428
Author(s):  
Wen Bin Dai ◽  
Xin Li Wang ◽  
Peng Zhao ◽  
Jing Kun Yu
Keyword(s):  
Solid Solution ◽  
Thermal Shock ◽  
Grain Growth ◽  
Thermal Shock Resistance ◽  
Soaking Time ◽  
Water Quench ◽  
Shock Resistance ◽  
Quench Test

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.

scholarly journals The effect of Y2O3 addition on thermal shock behavior of magnesium aluminate spinel

2009 ◽  
Vol 41 (1) ◽  
pp. 75-81 ◽  
Author(s):  
Milica Posarac ◽  
A. Devecerski ◽  
T. Volkov-Husovic ◽  
B. Matovic ◽  
D.M. Minic
Keyword(s):  
Thermal Shock ◽  
Young Modulus ◽  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Ultrasonic Determination ◽  
Spinel Mgal2o4 ◽  
Thermal Shock Behavior ◽  
Y2o3 Addition ◽  
New Phase

The effect of yttria additive on the thermal shock behavior of magnesium aluminate spinel has been investigated. As a starting material we used spinel (MgAl2O4) obtained by the modified glycine nitrate procedure (MGNP). Sintered products were characterized in terms of phase analysis, densities, thermal shock, monitoring the damaged surface area in the refractory specimen during thermal shock and ultrasonic determination of the Dynamic Young modulus of elasticity. It was found that a new phase between yttria and alumina is formed, which improved thermal shock properties of the spinel refractories. Also densification of samples is enhanced by yttria addition.

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