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

Creep behavior in interlaminar shear of a Hi-NicalonTM/ SiC-B4C composite at 1200∘C in air and in steam

“…Numerous recent studies investigated mechanical behavior of high-performance SiC/SiC composites at elevated temperature [17][18][19][20][21][22][23][24][25][26][27]. Efforts to assess the life-limiting behaviors of SiC/SiC CMCs have been focused mainly on the fiber-dominated properties.…”

“…All tests were performed at 1200 • C using the experimental set-up detailed elsewhere [25]. 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.…”

“…2a and 2b, 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 [25] for extensometer information). For strain measurement, the extensometer rods were placed as close to the notch tips of the specimen as possible.…”

Creep of Hi-Nicalon S Ceramic Fiber Tows at 800 deg C in Air and in Silicic Acid-Saturated Steam

“…As such, many efforts have been and continue to be made to overcome the oxidation problem. This has lead to the development of self-healing matrix materials [85][86][87][88][89][90][91], fiber coatings that shield the fiber from the oxidizing environment [47,92], and improvements in SiC fibers to reduce oxygen content and achieve near-stoichiometric fibers [19,20,93].…”

A residual strength model for the fatigue strengthening behavior of 2D needled CMCs

“…The prediction of fatigue damage and fatigue life for composites has been the subject of many investigations during recent years [8][9][10][11][12]. According to Liu [13], the fatigue life models are divided into three classes: residual strength-based model, stiffness degradation-based model, damage tolerance model.…”