Modeling Effects of Temperature, Microstructure, and Residual Stress on Mechanical Properties of Laminated Ceramics

ABSTRACT

The lack of theoretical models for temperature‐dependent mechanical properties, such as hardness and fracture strength, of laminated whisker‐ and particle‐reinforced ceramic composites is a significant concern. In this work, the temperature‐dependent yield and fracture criteria for laminated whisker‐ and particle‐reinforced ceramic matrix composites are discussed. Furthermore, the theoretical models for temperature‐dependent hardness and fracture strength of laminated ceramic matrix composites are proposed. The validity of the developed temperature‐dependent models is supported by the strong correlation between model predictions and both our experimental results and those reported in existing literature. Notably, the identification of primary control mechanisms governing the high‐temperature mechanical properties of laminated ceramics, encompassing the intrinsic properties of monolithic materials, microstructure and its evolution, and interlaminar residual thermal stresses, is well‐established. A key feature of the proposed models in this work is fitting‐free quantitative prediction of hardness and strength of laminated ceramics at high temperatures, grounded in well‐defined physical mechanisms.