Creep behavior in interlaminar shear of a Hi-Nicalon™/SiC–B4C composite at 1200 °C in air and in steam

Static fatigue of Hi‐Nicalon™‐S fiber at elevated temperature in air, steam, and silicic acid‐saturated steam

“…SiC‐SiC CMCs must support mechanical loads at high temperatures in combustion environments and in other types of oxidizing environments that typically have steam as one of the components . Recent studies report severe degradation of high‐temperature mechanical performance of SiC‐SiC composites in steam . Hi‐Nicalon™‐S SiC fibers are used in many of these SiC‐SiC CMCs .…”

Creep in Interlaminar Shear of a Nextel™720/aluminosilicate Composite at 1100°C in Air and in Steam

“…For example, Choi et al . obtained ILSS values of 20–30 MPa for Hi‐Nicalon/SiC at 1316°C in air and Ruggles‐Wrenn et al . reported ILSS of 27 MPa for Hi‐Nicalon ™ /SiC‐B 4 C at 1200°C.…”

“…All tests were performed at 1100°C using the experimental setup detailed elsewhere . In all tests, a specimen was heated to test temperature at 1°C/s and held at temperature for additional 30 min prior to testing.…”

“…a and b, respectively. The 13 mm distance between the notches permits the measurement of compressive strain between the notch tips with an MTS high‐temperature extensometer of 12.5‐mm gage length (see Ruggles‐Wrenn et al . for extensometer information).…”

“…In the case of the porous matrix oxide–oxide CMCs, interlaminar shear failure is controlled by the exceptionally weak porous matrix. Recently, Ruggles‐Wrenn et al . studied creep behavior in interlaminar shear of Nextel ™ 720/alumina and Hi‐Nicalon ™ /SiC‐B 4 C composites at 1200°C in air and in steam.…”