Method of producing structure for producing casting, and structure such as mold
US-2015361619-A1 · Dec 17, 2015 · US
Spherical Fused Silica Compositions for Injection Molded Ceramic Cores and Methods of Making Parts Using Such Compositions
US2023339013A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023339013-A1 |
| Application number | US-202217660038-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 21, 2022 |
| Priority date | Apr 21, 2022 |
| Publication date | Oct 26, 2023 |
| Grant date | — |
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Abstract
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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.
First claim
Opening claim text (preview).
What is claimed is: 1 . 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. 2 . The ceramic core composition of claim 1 , wherein: the inorganic portion of the ceramic core composition comprises: about 95 to 97% by weight spherical fused silica; and about 3 to 5% by weight zircon; and the organic portion of the ceramic core composition comprises: about 86 to 87% by weight binder; about 1.2 to 1.6% by weight dye; about 8 to 10% by weight surfactant; and about 2 to 4% by weight polymeric fiber. 3 . The ceramic core composition of claim 2 , wherein the spherical fused silica comprises a plurality of particles, the plurality of particles having the following particle size distribution: size of particle % of particles (in microns) about 0-3 <1.16 about 0-1.5 1.16-1.64 about 0-1.8 1.64-2.31 about 1.4-2.4 2.31-3.27 about 1.6-2.6 3.27-4.62 about 2.0-3.0 4.62-6.54 about 2.9-3.9 6.54-9.25 about 4.4-5.4 9.25-13.08 about 6.6-7.6 13.08-18.50 about 9.2-10.2 18.50-26.16 about 12.7-13.7 26.16-37.0 about 16.9-17.9 37.0-52.33 about 16.7-17.7 52.33-74.0 about 9.6-10.6 74.0-104.7 about 3.9-4.9 104.7-148.0 about 1.4-2.4 148.0-209.3 about 1.4-2.4 209.3-296.0 about 0-2 >296.0. 4 . The ceramic core composition of claim 1 , wherein the spherical fused silica comprises a plurality of particles, the plurality of particles having the following particle size distribution: size of particle % of particles (in microns) about 0-3 <1.16 about 0-1.5 1.16-1.64 about 0-1.8 1.64-2.31 about 1.4-2.4 2.31-3.27 about 1.6-2.6 3.27-4.62 about 2.0-3.0 4.62-6.54 about 2.9-3.9 6.54-9.25 about 4.4-5.4 9.25-13.08 about 6.6-7.6 13.08-18.50 about 9.2-10.2 18.50-26.16 about 12.7-13.7 26.16-37.0 about 16.9-17.9 37.0-52.33 about 16.7-17.7 52.33-74.0 about 9.6-10.6 74.0-104.7 about 3.9-4.9 104.7-148.0 about 1.4-2.4 148.0-209.3 about 1.4-2.4 209.3-296.0 about 0-2 >296.0. 5 . The ceramic core composition of claim 4 , wherein the binder is a thermoplastic material. 6 . The ceramic core composition of claim 5 , wherein the thermoplastic material is a paraffin-based wax. 7 . The ceramic core composition of claim 5 , wherein the surfactant comprises an effective amount of sodium stearate, an effective amount of aluminum stearate, and an effective amount of oleic acid. 8 . The ceramic core composition of claim 7 , wherein the polymeric fiber comprises rayon fiber. 9 . The ceramic core composition of claim 1 , wherein the spherical fused silica comprises a plurality of particles, the plural
Assignees
Inventors
Classifications
- B22C1/00Primary
Compositions of refractory mould or core materials; Grain structures thereof (refractory materials in general C04B35/00); Chemical or physical features in the formation or manufacture of moulds · CPC title
based on silica · CPC title
Polymers (C04B35/636 takes precedence) · CPC title
Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F}) · CPC title
Cores; Manufacture or installation of cores {(breaker cores B22C9/084)} · CPC title
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- What does patent US2023339013A1 cover?
- 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 …
- Who is the assignee on this patent?
- Chromalloy Gas Turbine Llc
- What technology area does this patent fall under?
- Primary CPC classification B22C1/00. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Oct 26 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).