Mechanical property characterization of fiber-reinforced SiC matrix composites.

摘要

Mechanical properties of Nicalon-fiber-reinforced silicon carbide (SiC) matrix composites fabricated by a forced chemical vapor infiltration (CVI) process have been measured and compared with properties of composites fabricated by a conventional isothermal process. The mechanical properties are nearly identical for composites fabricated by the two processes provided that hot-face temperatures <1200(degree)C are used for the forced CVI process. Composites reinforced with more stable Tyranno fibers were fabricated by forced CVI and exhibited room temperature mechanical properties similar to those of Nicalon-reinforced composites and improved high-temperature strengths. 18 refs., 4 figs., 3 tabs. (ERA citation 15:035054)