United Technologies Corporation

Kirk C Newton

John Joseph Marcin

Mario P Bochiechio

Michael A Kmetz

James Thompson Beals

Alan David Cetel

Douglas Michael Berczik

A chemical vapor deposition (CVD) reactor includes a double wall vacuum processing chamber with an inner wall and an outer wall and fluid passages between the walls. A layer of thermal insulation covers the outer wall. A layer of high temperature thermal insulation covers the inner wall. Heating elements are positioned in the interior of the processing chamber to heat a substrate mounted in the chamber. A gas inlet structure is positioned through the inner and outer walls of the chamber and oriented to direct a flow of reactant gas against the substrate to form a CVD coating on the substrate. A gas outlet structure connected to a vacuum and effluent management system is positioned through the inner and outer walls of the chamber. Fluid inlet and outlet structures positioned to circulate heated thermal transfer fluid through the passages between the inner and outer walls maintain a controlled isothermal inner wall temperature above a condensation temperature of reactant gas and effluent reacted gas byproducts from condensing on the inner walls and insulation in the chamber.

Isothermal warm wall CVD reactor

A method for desulfurizing a metal alloy comprises heating the metal alloy to a molten state. A gaseous desulfurizing compound is bubbled through the molten alloy to form a solid sulfur-containing waste phase and a molten reduced-sulfur alloy phase. The solid waste phase and the molten reduced-sulfur alloy phase are separated. The gaseous desulfurizing compound includes a constituent element selected from the group: alkali metals, alkaline earth metals, and rare earth metals.

Gaseous based desulfurization of alloys

A casting system includes a core and a shell positioned relative to the core. A barrier coating is applied on at least one of the core and the shell, and may be applied to both the core and the shell. The barrier coating limits reaction between the casting system and a casting alloy.

Casting system for investment casting process

A ceramic composite article includes ceramic carbide fibers and a ceramic matrix in which the ceramic carbide fibers are embedded. The ceramic matrix includes a laminar structure with at least one layer of a first ceramic material and at least one layer of a second, different ceramic material.

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Enfield, CT, United States of America

Kirk C Newton