Spherical fused silica compositions for injection molded ceramic cores and methods of making parts using such compositions
AssigneeChromalloy Gas Turbine Corporation
InventorsGerald C. Dodds, Mark S. Haber, Zachary E. Baierl
Life of this patent
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Abstract
A single crystal ceramic core composition has an inorganic portion and an organic portion. The inorganic portion makes up about 85% by weight of the total weight of the ceramic core composition, and the organic portion makes up about 15% by weight of the total weight of the ceramic core composition. The inorganic portion includes about 94 to 98% by weight spherical fused silica, and about 2 to 6% by weight zircon flour. The organic portion includes about 84 to 88% by weight binder, about 1 to 2% by weight dye, about 6 to 12% by weight surfactant, and about 1 to 5% by weight polymeric fiber.
Claims17
A single crystal ceramic core composition, comprising:
- an inorganic portion comprising about 85% by weight of the total weight of the ceramic core composition, the inorganic portion comprising:
- about 94 to 98% by weight spherical fused silica;
- and
- about 2 to 6% by weight zircon;
- and
- an organic portion comprising about 15% by weight of the total weight of the ceramic core composition, the organic portion comprising:
- about 84 to 88% by weight binder;
- about 1 to 2% by weight dye;
- about 6 to 12% by weight surfactant;
- and
- about 1 to 5% by weight polymeric fiber.
A single crystal ceramic core composition, comprising:
- an inorganic portion comprising about 85% by weight of the total weight of the ceramic core composition, the inorganic portion comprising:
- about 94 to 98% by weight spherical fused silica;
- and
- about 2 to 6% by weight zircon;
- and
- an organic portion comprising about 15% by weight of the total weight of the ceramic core composition, the organic portion comprising:
- about 84 to 88% by weight binder;
- and
- about 12 to 16% by weight surfactant and dye.
Dependencies are inferred from the claim text.