United Technologies Corporation

Venkat Seetharaman

James Thompson Beals

Dilip M Shah

Daniel A Bales

Carl R Verner

Dinesh K Gupta

Keith A Santeler

Sudhangshu Bose

Stephen Douglas Murray

Daniel F Paulonis

John J Marcin

Joshua E Persky

Glenn A Cotnoir

Jacob A Snyder

John D Wiedemer

Stephen D Murray

Keith Santeler

A refractory metal core for use in a casting system has a coating for providing oxidation resistance during shell fire and protection against reaction/dissolution during casting. In a first embodiment, the coating includes at least one oxide and a silicon containing material. In a second embodiment, the coating includes an oxide selected from the group of calcia, magnesia, alumina, zirconia, chromia, yttria, silica, hafnia, and mixtures thereof. In a third embodiment, the coating includes a nitride selected from the group of silicon nitride, sialon, titanium nitride, and mixtures thereof. Other coating embodiments are described in the disclosure.

Refractory metal core coatings

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Rocky Hill, CT, United States of America

Venkat Seetharaman