Thermal Shock in Ceramics
Thermal shock occurs when rapid temperature changes create stress that exceeds the material's tensile strength. The first Hasselman parameter (R) gives the maximum temperature difference a material can withstand without fracture initiation.
Key Factors
- Higher tensile strength: Can withstand more thermal stress
- Lower thermal expansion: Less stress for the same temperature change
- Higher thermal conductivity: Heat distributes faster, reducing gradients
- Lower elastic modulus: More flexibility to absorb thermal strain