CORRELATION OF PHYSICAL PROPERTIES OF CERAMIC MATERIALS WITH RESISTANCE TO FRACTURE BY THERMAL SHOCK

摘要

An analysis is made to determine which properties of materials affect the resistance to fracture by thermal stresses. From this analysis, a parameter is evaluated that is correlated with the resistance of ceramic materials to fracture by thermal shock as experimentally determined.nResistance to fracture by thermal shock is shown to be depen¬dent upon the following material properties: thermal conductivity, tensile strength, thermal expansion, and ductility modulus (ratio of stress to strain at failure). For qualitative prediction of resist¬ance of materials to fracture by thermal shock, the parameter may be expressed as the product of thermal conductivity and tensile strength divided by the product of linear coefficient of thermal expansion and ductility modulus of the specimen.