Hamilton Sundstrand Corporation

Goodrich Corporation

Jecee Jarman

Zachary Allen Ray Le Duc

Lauren Bartolo

Charles Hauser

A method is provided for forming a carbon/carbon (C/C) disk with boron nitride (BN) doping. Borazine is generated using a set of borazine precursors. Starting carbon fibers are coated or impregnated with the borazine in an inert atmosphere. The starting carbon fibers are needled into layered fabric and the layered fabric is needled into boards from which a preform is cut, the needling and cutting performed in the inert atmosphere. The borazine in the preform is stabilized to convert the borazine to polyborazylene. The polyborazylene in the preform is cured. The polyborazylene in the preform is then crystalized to form BN particulates. The preform with the BN particulates is carbonized and then densified with pyrolytic carbon.

Infiltrating boron nitride into a carbon-carbon substrate

In accordance with at least one aspect of this disclosure, a system includes, a cylinder barrel configured to rotate within a pump housing of a pump operatively connected to a driving member of the pump via a first shaft. A piston is seated within a bore defined in the cylinder barrel. The piston is operatively connected to the driving member of the pump via a second shaft. The first shaft and the second shaft each include a ball end configured to seat within the driving member. In embodiments, the ball end of at least the second shaft is of silicon nitride.

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Pueblo, CO, United States of America

Jecee Jarman