REFRACTORY METAL CORE COATINGS

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,...

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Bibliographische Detailangaben
Hauptverfasser:	MURRAY STEPHEN D, COTNOIR GLENN, BEALS JAMES T, BOSE SUDHANGSHU, SANTELER KEITH, VERNER CARL, WIEDEMER JOHN, SHAH DILIP M, SEETHARAMAN VENKAT, PERSKY JOSHUA, BALES DANIEL A, PAULONIS DANIEL FRANCIS, MARCIN JOHN J, SNYDER JACOB, GUPTA DINESH
Format:	Patent
Sprache:	eng
Schlagworte:	CASTING FOUNDRY MOULDING PERFORMING OPERATIONS POWDER METALLURGY SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER TRANSPORTING WORKING CEMENT, CLAY, OR STONE
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Beschreibung
Zusammenfassung:	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.