Temperature dependent fracture toughness of the particulate-reinforced ultra-high-temperature-ceramics considering effects of change in critical flaw size and plastic power

2019 ◽  
Vol 158 ◽  
pp. 28-33 ◽  
Author(s):  
Ruzhuan Wang ◽  
Dingyu Li ◽  
Xiaorong Wang ◽  
Weiguo Li
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Flaw Size ◽  
Temperature Dependent ◽  
Ultra High Temperature Ceramics ◽  
Critical Flaw ◽  
Particulate Reinforced ◽  
Ultra High Temperature

Temperature and Microstructures Dependent Thermal Shock Resistance Models for Ultra-High-Temperature Ceramics Considering Effect of Residual Stress

2013 ◽  
Vol 29 (4) ◽  
pp. 695-702 ◽  
Author(s):  
R. Z. Wang ◽  
S. G. Ai ◽  
W. G. Li ◽  
J. Zheng ◽  
C. Z. Zhang
Keyword(s):  
Residual Stress ◽  
High Temperature ◽  
Thermal Shock ◽  
Fracture Strength ◽  
Thermal Shock Resistance ◽  
Temperature Dependent ◽  
Ultra High Temperature Ceramics ◽  
Micro Cracks ◽  
Shock Resistance ◽  
Ultra High Temperature

ABSTRACTBased on the researches on the temperature and microstructures dependent fracture strength and temperature dependent thermal shock resistance, the new thermal shock resistance models for ultra-high-temperature ceramics were proposed. The effect of density on the fracture strength of material was investigated. A damage term was introduced to reveal the effects of uncertain factors on fracture strength. The roles of residual stress and microstructure sizes at different initial thermal shock temperatures in the thermal shock resistance were studied using the models. The study showed that the models can reveal the relationships among the residual stress, microstructure sizes and the temperature dependent thermal shock resistance well. The better thermal shock resistance is found for ultra-high-temperature ceramics having small SiC grains and relatively large micro-cracks around SiC grains. Large enhancement in thermal shock resistance can be achieved through our studies.

scholarly journals Predicting effective fracture toughness of ZrB2-based ultra-high temperature ceramics by phase-field modeling

2020 ◽  
Vol 192 ◽  
pp. 108713 ◽  
Author(s):  
Arezoo Emdadi ◽  
Jeremy Watts ◽  
William G. Fahrenholtz ◽  
Gregory E. Hilmas ◽  
Mohsen Asle Zaeem
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Phase Field ◽  
Phase Field Modeling ◽  
Ultra High Temperature Ceramics ◽  
Field Modeling ◽  
Ultra High Temperature
Sign in / Sign up

Export Citation Format

Share Document