Room temperature tensile and flexural strength of ceramics in AlN-SiC system

Abstract

Listen

Translate article

Tensile and bend strength were obtained for four compositions in the aluminum nitride-silicon carbide system: AlN, 75%AlN-25%SiC particulate, 50%AlN-50%SiC solid solution and SiC. Room temperature tensile strength, four-point bend strength, and the Weibull parameters for each of the tested materials are presented. Optical and SEM fractography were employed to identify failure initiating flaws for the fractured tensile specimens. The four-point bend strength is predicted using the Weibull tensile parameters and compared to measured values. Accuracy of the predicted results are rationalized based on observed microstructures and failure initiating flaws.