Method of forming a ductile fiber coating for toughening non-oxi

Details Method of forming a ductile fiber coating for toughening non-oxi Method of forming a ductile fiber coating for toughening non-oxi

1991-03-13

1992-11-10

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

428389, 428384, 427212, 427215, 427217, C04B 3576

Patent

active

051622718

ABSTRACT:
A method of toughening a fiber/matrix ceramic composite consisting of non-oxide based ceramic fibers immersed in a ceramic matrix. The method includes, prior to immersing the fibers in the matrix, applying a metallo-organic solution of a noble metal to the fibers to form a coating of the solution on the fibers, evaporating the solvent from the solution and oxidizing the residual organic compounds whereby the coating becomes a pure noble metal and immersing the coated fibers in the matrix. The applying, evaporating, oxidizing and immersing steps are characterized by a limited raising of the temperature of the fibers. The coating is ductile so as to blunt advancing cracks in the matrix.

REFERENCES:
patent: 4134759 (1979-01-01), Yajima et al.
patent: 4831707 (1989-05-01), Goddard et al.
patent: 4885199 (1989-12-01), Corbin et al.
patent: 4909910 (1990-03-01), Morin
patent: 4933309 (1990-06-01), Luthra

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