Complex sentence: Silicon carbide fibers are produced via pyrolysis of organic polymers, and therefore their corrosion properties are similar to those of the silicon carbide produced for LPI-matrices: the fibers are more sensitive to bases and oxidizing media than pure silicon carbide.
Split into simpler sentences: Silicon carbide fibers are produced via pyrolysis of organic polymers, and therefore their corrosion properties are similar to those of the silicon carbide foun in LPI-matrices. These fibers are thus more sensitive to bases and oxidizing media than pure silicon carbide.