Refractory metal core

Refractory metal core

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 comprises at least one oxide and a silicon containing material. In a second embodiment...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SNYDER, JACOB, SHAH, DILIP M, SEETHARAMAN, VENKAT, BOSE, SUDHANGSHU, GUPTA, DINESH, PERSKY, JOSHUA, MURRAY, STEPHEN D, BALES, DANIEL A, COTNOIR, GLENN, SANTELER, KEITH, BEALS, JAMES T, PAULONIS, DANIEL F, VERNER, CARL, WIEDEMER, JOHN, MARCIN, JOHN J
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CASTING
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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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 comprises at least one oxide and a silicon containing material. In a second embodiment, the coating comprises an oxide selected from the group consisting of calcia, magnesia, alumina, zirconia, chromia, yttria, silica, hafnia, and mixtures thereof. In a third embodiment, the coating comprises a nitride selected from the group consisting of silicon nitride, sialon, titanium nitride, and mixtures thereof. Other coating embodiments are described in the disclosure.