Preparation and properties of carbon fiber reinforced ZrC-ZrB_2 based composites via reactive melt infiltration

摘要

Carbon fiber reinforced ZrC-ZrB_2 based (C/C-ZrC-ZrB_2) composites, which were prepared by reactive infiltration of zirconium into a porous C/C-B_4C preform, had the density of 3.07 g/cm~3, the open porosity of 9.1% and the flexural strength of 147 MPa. ZrB_2 matrix was surrounded by or adjoined to the ZrC one and Zr-ZrC eutectic including residual α-Zr dispersed among the reaction-formed ceramics. The amount of ZrC-ZrB_2 matrix in the composites was ～30.2 vol.%. The mass loss rate and the linear recession rate under an oxyacetylene torch were 0.0039 g/s and 0.01 mm/s, respectively.