Isotropic pyrocarbon deposited at 1250°C by means of thermal gradient chemical vapor deposition

Abstract Isotropic pyrocarbon was fabricated at 1250 °C via thermal gradient chemical vapor deposition. The density of the deposit was measured using Archimedes methods and the microstructure was examined by polarized light microscope and scanning electron microscope. The results showed that the density of the deposit was about 1.85 g/cm 3 and it was constituted of spherical pyrocarbon grains which was about 0.6–0.8 μm in diameter and compacted densely and there are some microcracks in the deposit.