US 7,575,039 B2
	Refractory metal core coatings
James T. Beals, West Hartford, Conn. (US); Joshua Persky, Manchester, Conn. (US); Dilip M. Shah, Glastonbury, Conn. (US); Venkat Seetharaman, Rocky Hill, Conn. (US); Sudhangshu Bose, Manchester, Conn. (US); Jacob Snyder, Southington, Conn. (US); Keith Santeler, Middletown, Conn. (US); Carl Verner, Windsor, Conn. (US); Stephen D. Murray, Marlborough, Conn. (US); John Marcin, Marlborough, Conn. (US); Dinesh Gupta, South Windsor, Conn. (US); Daniel A. Bales, Avon, Conn. (US); Daniel Francis Paulonis, Higganum, Conn. (US); Glenn Cotnoir, Thompson, Conn. (US); and John Wiedemer, Glastonbury, Conn. (US)
Assigned to United Technologies Corporation, Hartford, Conn. (US)
Filed on Oct. 15, 2003, as Appl. No. 10/685,631.
Prior Publication US 2009/0114797 A1, May 07, 2009
Int. Cl. B22C 9/10 (2006.01)

U.S. Cl. 164—369

8 Claims

6. A casting system including a refractory metal core, said refractory metal core having means for providing oxidation resistance during shell fire and protection against reaction/dissolution during casting, said oxidation resistance and protection means comprising a coating contacting said refractory metal core, said coating comprising a nitride selected from the group consisting of silicon nitride, sialon, and mixtures thereof.