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USE OF MONAZITE OR XENOTIME SOLUTION PRECURSORS TO INCREASE THE DENSITY AND SHEAR STRENGTH OF OXIDE COMPOSITES
USE OF MONAZITE OR XENOTIME SOLUTION PRECURSORS TO INCREASE THE DENSITY AND SHEAR STRENGTH OF OXIDE COMPOSITES
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机译:使用独居石或Xenotime溶液前体来增加氧化物复合材料的密度和抗剪强度
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摘要
Aqueous precursor solutions are described that comprise at least one monazite-based material precursor, at least one xenotime-based material precursor or a combination thereof; and a plurality of fine suspended particles of an oxide material. Contemplated oxide composites, as described herein, comprise a plurality of fibers surrounded by at least one monazite or xenotime-based material, wherein the oxide composite has nearly a fully dense matrix. Contemplated embodiments disclosed herein provides a method for producing an oxide composite with nearly fully dense matrix and with all fibers surrounded by a monazite- or xenotime-based material that prevents embrittlement at temperatures at least as high as 1200° C. Oxide composites are described that contain a plurality of fibers, a matrix containing at least one or more oxide materials, and at least one monazite-based material, xenotime-based material or combination thereof, wherein the monazite-based or xenotime-based material is formed from the aqueous precursor solutions disclosed herein. Contemplated methods of production include: a) providing a composite comprising oxide-reinforcing fibers and a porous matrix of oxide materials, and b) infiltrating the porosity in the matrix with a solution that contains precursors for at least one monazite-based material, at least one xenotime-based material or a combination thereof; and c) heat treating the composite to convert the precursors to monazite, xenotime, or combinations thereof.
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