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Creep-Rupture Behavior Of An Oxide/Oxide Ceramic Matrix Composite At Elevated Temperatures In Air And Steam Environments, Lee B. Harlen
Creep-Rupture Behavior Of An Oxide/Oxide Ceramic Matrix Composite At Elevated Temperatures In Air And Steam Environments, Lee B. Harlen
Theses and Dissertations
Oxide/oxide ceramic matrix composites (CMCs) are being considered for applications such as jet engine combustion chambers and afterburner flaps. Nextel™ 720/A (N720/A), an oxide/oxide CMC with an alumina matrix and no interphase at the fiber-matrix interface, was developed specifically to provide improved long-term properties and performance at 1200°C. This study focused on experimental investigation of creep behavior of N720/A [0/90] at elevated temperatures in laboratory air and in 100% steam environment. Monotonic tensile tests to failure were performed at 23, 1200, and 1330°C. Ultimate tensile strength (UTS) values were established and monotonic stress-strain curves were produced. Creep-rupture tests at 1200°C …