Investigation of Thermal Shock Resistance of Ceramic Materials Under Programmed Heating

AbstractAdvanced ceramic materials offer significant thermodynamic efficiency advantages over metals and alloys because of their higher use temperatures. Using ceramic components results in higher temperature industrial processes which convert fuels to energy more efficiently, reducing environmental emissions. Ceramics have always offered high temperature strength and superior corrosion and erosion resistance. However, brittleness, poor thermal shock resistance and catastrophic failure have slowed industrial adoptions of ceramics in environmental applications.This paper will focus on environmental applications of three new advanced ceramic materials that are overcoming these barriers to industrial utilization through improved toughness, reliability, and thermal shock performance. PRD-66, a layered oxide ceramic with outstanding thermal shock resistance and high use temperature with utility in catalyst support, insulation, and hot gas filtration applications, is discussed. Tough silicon carbide fiber reinforced silicon carbide (SiC/SiC) and carbon fiber reinforced silicon carbide (C/SiC) ceramic composites made by chemical vapor infiltration, and silicon carbide particulate reinforced alumina (SiCp/A12O3) composites made through Lanxide Corporation's DIMOX™ directed metal oxidation process are described. Applications of these materials to pollution reduction and energy efficiency in medical and municipal waste incineration, heat management, aluminum remelting, pyrolysis, coal combustion and gasification, catalytic pollution control, and hot gas filtration, will be discussed.

Download Full-text

Thermal shock resistance of ceramic materials in melt immersion tests

Journal of the European Ceramic Society ◽

10.1016/0955-2219(89)90040-x ◽

1989 ◽

Vol 5 (6) ◽

pp. 365-370 ◽

Cited By ~ 5

Author(s):

W. Dienst ◽

H. Scholz ◽

H. Zimmermann

Keyword(s):

Thermal Shock ◽

Thermal Shock Resistance ◽

Ceramic Materials ◽

Shock Resistance

Download Full-text

Estimation of Thermal Shock Resistance by Infrared Radiation Heating and Water Flow Cooling Techniques

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.317-318.339 ◽

2006 ◽

Vol 317-318 ◽

pp. 339-342

Author(s):

Sawao Honda ◽

Hiroaki Tanaka ◽

Hideo Awaji

Keyword(s):

Thermal Shock ◽

Thermal Shock Resistance ◽

Rapid Heating ◽

Ceramic Materials ◽

Shock Resistance ◽

Testing Techniques ◽

Experimental Values ◽

Definition Of ◽

Increasing Temperature ◽

Good Agreement

Thermal shock is a mechanism often leading to failure of ceramic materials that may occur during rapid heating or cooling. These tests were performed in order to compare the thermal shock resistance of ceramic materials by cooling with that of the heating method and hence to evaluate parameters such as thermal shock strength (R1c) and thermal shock fracture toughness (R2c). During the present study, thermal shock resistance of alumina and mullite ceramics was estimated experimentally and theoretically using the thermal shock parameters. The critical thermal stress at the onset of thermal shock fracture was calculated using fracture time, which is measured by an acoustic emission. Results show that thermal shock parameters of alumina specimens decreased with increasing temperature of fracture point. This effect can be attributed to the temperature dependence of the thermal properties. The experimental values of thermal shock parameters evaluated by IRH and WFC techniques were in good agreement at the temperature of fracture point. The thermal shock parameters enabled the definition of a unified thermal shock resistance of ceramics, which is independent of the nature of the testing techniques.

Download Full-text

Normalized evaluation of thermal shock resistance for ceramic materials

Journal of Advanced Ceramics ◽

10.1007/s40145-014-0118-9 ◽

2014 ◽

Vol 3 (3) ◽

pp. 250-258 ◽

Cited By ~ 11

Author(s):

Kai Li ◽

Dalei Wang ◽

Han Chen ◽

Lucun Guo

Keyword(s):

Thermal Shock ◽

Thermal Shock Resistance ◽

Ceramic Materials ◽

Shock Resistance

Download Full-text

Effect of the cooling medium temperature on the thermal shock resistance of ceramic materials

Materials Letters ◽

10.1016/j.matlet.2014.09.137 ◽

2015 ◽

Vol 138 ◽

pp. 216-218 ◽

Cited By ~ 20

Author(s):

Weiguo Li ◽

Ruzhuan Wang ◽

Dingyu Li ◽

Xueliang Shen ◽

Haibo Kou ◽

...

Keyword(s):

Thermal Shock ◽

Thermal Shock Resistance ◽

Ceramic Materials ◽

Medium Temperature ◽

Cooling Medium ◽

Shock Resistance

Download Full-text

Evaluation of Thermal Shock Resistance for Ceramic Materials by Young’s Modulus

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.766.170 ◽

2018 ◽

Vol 766 ◽

pp. 170-174

Author(s):

Jun Arikawa ◽

Takeshi Shiono

Keyword(s):

Thermal Shock ◽

Young’S Modulus ◽

Temperature Difference ◽

Thermal Shock Resistance ◽

Fracture Stress ◽

Young's Modulus ◽

Ceramic Materials ◽

Thermal Shock Test ◽

Shock Test ◽

Shock Resistance

When a sudden temperature difference is applied to a brittle material such as ceramics, some cracks will occur in the material and it may fracture in some case. The generated cracks as a fracture origin may cause the strength reduction, so the evaluation of thermal shock resistance is very important for ceramic materials. In the conventional evaluation of the thermal shock resistance (thermal shock fracture temperature, ΔTC), the fracture stress is measured after thermal shock test as a function of temperature difference. For this method, however, many specimens are required to estimate fracture stress by bending test and the variation of the stress is large. In the present study, we tried to specify the temperature of crack initiation by measuring Young's modulus and fracture stress before and after a thermal shock test with different temperature difference. Polycrystalline alumina with high purity was used for evaluation of thermal shock resistance. The Young's modulus of all specimens was measured by resonance method. The specimen at the prescribed temperature between 200°C and 600°C, it was quickly put into water to apply thermal shock. The Young's modulus of specimens after the test was measured and the change in Young's modulus before and after thermal shock test was evaluated. Further, the specimen after the evaluation was measured the fracture strength. As a result, it was found that Young's modulus is possible to estimate thermal shock resistance. Further it is also possible to evaluate thermal shock behaviors using only one specimen.

Download Full-text