Fracture mechanisms for SiC fibers and SiC/SiC composites under stress-rupture conditions at high temperatures

Abstract

The successful application of SiC/SiC ceramic matrix composites as high-temperature structural materials depends strongly on maximizing the fracture or rupture life of the load-bearing fiber and matrix constituents.

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

“…In more recent times, this same relationship has been shown to apply to creep of ceramic materials as well [4,46,[187][188][189][190]. The Monkman-…”

“…DiCarlo et al successfully predicted the creep lifetime of various oxide and non-oxide composites using the Monkman-Grant relationship based on data from single filament creep test results [46,187,188]. In 2004, they did so for SiC/SiC minicomposites [46] reinforced with various types of first and second generation SiC fibers, including HiNicalon T M .…”

“…In 2004, they did so for SiC/SiC minicomposites [46] reinforced with various types of first and second generation SiC fibers, including HiNicalon T M . Data was used from creep tests of these CMCs at 1200 -1400…”

“…• C data. Data is from the current work and reproduced from Steffens [1] and Shillig [23] Because the performance of CMCs is predominantly dependent on the performance of their fiber reinforcements, it would seem to follow that if Hi-Nicalon CMCs [46,94,195,196], however these studies were conducted at temperatures of 1100 -1400…”

“…CMCs reinforced with Hi-Nicalon Data is from the current work and reproduced from DiCarlo et al [46], Zhu et al [191,197], and Hurst et al [196] The Monkman-Grant relationship for Hi-Nicalon…”