DIFFERENT FIBERS EXPOSED TO TEMPERATURES UP TO 1000°C

摘要

E-glass, Carbon, Basalt and SiC fibers were exposed to high temperature in air environment. Samples were placed in a furnace at different temperatures (up to 1000°C) to determine the thermal effect in the tensile strength using the single-fiber testing method. Weibull statistics were made for all fibers and exposure temperatures. The characterization of the microstructure was conducted by scanning electron microscopy, x-ray diffraction and thermo-gravimetric analysis. Results showed important aspects that may be considered when these fibers are reinforcing ceramic composites under high temperature oxidation environments. It was found that for all fibers the tensile strength was significantly affected by the exposure temperature.