Oxide Composites of Al2O3 and LaPO4

Some properties of oxide composites based on Al 2 O 3 and LaPO 4 (La-monazite) are examined. A composite consisting of woven Al 2 O 3 fibers with a porous matrix of Al 2 O 3 and LaPO 4 is shown to be damage tolerant and notch insensitive. The feasibility of achieving fiber sliding and pullout in a composite with a fully dense matrix is investigated using a small hot-pressed composite of sapphire fibers and LaPO 4 matrix.