Article ID Journal Published Year Pages File Type
10626546 Ceramics International 2005 6 Pages PDF
Abstract
Hot press is firstly used before infiltration and pyrolysis cycles to enhance the densities and the mechanical properties of three-dimensional-braided carbon fibers reinforced SiC composites (3D-braided C/SiC) fabricated via preceramic infiltration-pyrolysis (PIP) process. The influences of temperature, pressure, temperature at which the pressure should be applied, holding time and introduction of inert fillers during the hot-pressing process are especially studied. The results show that the hot-press step used before the PIP cycles is positive to the mechanical properties of the materials. The 1873 K, 1 MPa, 5-min hot-pressing parameters give good properties to the materials. It is beneficial to the properties that hot press is applied after PCS is pyrolyzed to β-SiC completely. Conversely, the introduction of inert filler SiC powders to enhance the properties of the materials is not effective under the above conditions.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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