Failure Behaviour of Three Dimensional Hi‐Nicalon/Silicon Carbide Composites Fabricated by Chemical Vapour Infiltration

Silicon carbide fiber reinforced silicon carbide composites (SiC/SiC) are the most potential thermal-structure materials to be used in advanced aero-engines, space, and fusion power reactors. Many investigations have been conducted on one dimensional and two-dimensional woven SiC/SiC composite materials [1-6]. Recently, attention has been focused on three-dimensional (3D) woven or braided ceramic matrix composite materials in order to meet mechanical and thermal properties requirements under most complex loads [7-12]. In the present research, the authors prepared 3D textile Hi-Nicalon SiC/SiC composites by chemical vapor infiltration and examined the mechanical properties over the temperature range from room temperature to 1300°C. The aims of the current contribution were to develop an understanding of the architecture on the mechanical properties and the failure behavior of the 3D Hi-Nicalon SiC/SiC composites.