Fabrication and characterization of a porous-matrix oxide fibrous monoliths.

摘要

We have fabricated unidirectional fibrous monoliths based on dense ZrSiO(sub 4) cells that are surrounded by a porous, weak ZrSiO(sub 4) cell boundary phase. We coextruded a duplex filament, cut it to short lengths, bundled the lengths and packed them into an extruder, and then extruded a new filament. This filament was cut and packed into a bar die to produce test specimens. After heat treatment, the specimens were tested in four-point flexure and examined by scanning electron microscopy. Load-displacement curves were linear to failure, but some evidence of toughening was observed microscopically.