Process for dense 2D SiC fiber-SiC matrix composites

Abstract

A new process using SiC fiber fabrics and SiC tapes to produce dense 2D SiC fiber-SiC (SiC/SiC) composites is demonstrated. The strategy for fabricating the SiC/SiC composites involves: (i) alternately stacking the SiC fiber fabrics and SiC tapes at room temperature, (ii) pyrolyzing of the stacked composites, and (iii) hot-pressing the pyrolyzed composites. By controlling the hot-pressing temperature, it is possible to obtain dense 2D SiC/SiC composites with relative densities of > 98 %. The 2D SiC/SiC composites show no degradation of the SiC fibers and a higher mechanical strength.

Joining of silicon carbide ceramics using a silicon carbide tape

“…SiC tape with a thickness of 170 μm and a width of 150 mm was prepared from a mixture of 96.00 wt% β‐SiC, 2.56 wt% Al 2 O 3 , 1.04 wt% Y 2 O 3 , and 0.4 wt% MgO. The details of the tape casting process are described in a previous paper . The chemical composition of the tape selected in this study was the same as the base SiC material.…”

Characterization of MeV Ion-Irradiated SiC_f/SiC Composites Prepared with Different Methods

“…The pyrolyzed compact was hot-pressed at 1750 o C for 1-4 h under a pressure of 15 MPa in an argon atmosphere. Details of this process were described previously [5]. Tyranno-SA TM was used as a reinforcing substrate.…”