Utilizing two-point correlation method for microstructure and mechanical evaluation of silicon nitride ceramics

Abstract

In this article, the impact of microstructure on the mechanical properties of silicon nitride materials obtained by the liquid-phase sintering method was investigated. Using image analysis based on the two-point correlation method, the relationship between the autocorrelation length (ACL) parameter and the homogeneity of the microstructure and its impact on mechanical properties were examined. It was shown that lower ACL values, indicating greater microstructure homogeneity, correlate with better mechanical properties, such as bending strength, hardness and fracture toughness. The two-point correlation analysis demonstrated advantages over traditional microstructural analysis methods, offering efficiency, precision and automation capabilities, which are crucial for quality control in the industry.