The Babcock & Wilcox Company

Mcdermott Technology, Inc.

Charles A Hill

Richard W Goettler

Eric A Barringer

Thomas A Johnson

Ronald G Komoroski

Greg A Gunter

Richard A Wagner

James P Price, Jr

A ceramic fiber composite structure particularly suitable for use as a hot gas cleanup ceramic fiber composite filter and method of making same from ceramic composite material has a structure which provides for increased strength and toughness in high temperature environments. The ceramic fiber composite structure or filter is made by a process in which a continuous ceramic fiber is intimately surrounded by discontinuous chopped ceramic fibers during manufacture to produce a ceramic fiber composite preform which is then bonded using various ceramic binders. The ceramic fiber composite preform is then fired to create a bond phase at the fiber contact points. Parameters such as fiber tension, spacing, and the relative proportions of the continuous ceramic fiber and chopped ceramic fibers can be varied as the continuous ceramic fiber and chopped ceramic fiber are simultaneously formed on the porous vacuum mandrel to obtain a desired distribution of the continuous ceramic fiber and the chopped ceramic fiber in the ceramic fiber composite structure or filter.

Method of making a continuous ceramic fiber composite hot gas filter

A thermally bonded fibrous product is composed of a sintered blend of ceramic fibers, low-grade silica material and boron nitride.

Thermally bonded fibrous product

A thermally bonded fibrous product is composed of a sintered blend of aluminosilicate fibers, silica powder and boron nitride powder.

A fiber-free refractory coating composition consisting essentially of an aluminosilicate mineral selected from the group consisting of kyanite, andalusite, and sillimanite; alumina; colloidal silica; and water. This mixture is characterized by good adhesion to substrate material, and excellent resistance to thermal shock and chemical attack through a wide range of firing temperatures up to 3000.degree. F.

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Lynchburg, VA, United States of America

Charles A Hill