Development of High-Temperature, Interlaminar Tension (ILT) Test Methodology for Ceramic Matrix Composites (CMCs)

Abstract This paper was to present how an affordable, high-temperature, interlaminar tension (ILT) strength testing method was explored and developed for ceramic matrix composites (CMCs), leading to development of a diametral-compression test methodology. The test methodology was first delved and verified at ambient temperature by employing a model, 2D-woven polymer matrix composite (PMC) with various test-specimen configurations. The test method was then applied to and confirmed with two different gas-turbine grade CMCs of 2D MI SiC/SiC and 2D N720/alumina oxide/oxide at both ambient and elevated temperatures. Life prediction testing was also conducted at 1316oC for the MI SiC/SiC to validate the effectiveness of test method for a long-term life prediction testing. All of the results on strength and life prediction testing indicated an applicability and feasibility as an appropriate high-temperature ILT test methodology in CMCs with provisions of simplicity, affordability, and technical soundness.